Impreza knock when cold. Suddenly having engine knock cruising, 1.
Impreza knock when cold This is repetitive and associated with rotation of the tires. 2 in a 95 Legacy automatic. Once warm it's hardly noticable Customer: Working on a 2017 Forester. That is rod knock for sure. or the engine is cold. If it's an Auto Zone or Walmart battery, that may well be your problem. One of the most alarming sounds you can hear from your Subaru Impreza is the engine knocking. I never bothered to look any deeper that trying to wiggle the rod ends on the crank. Mine has just started since it got cold (down to 30 or below at night). I have the same symptom. It's much more audible when the engine is cold, but (theoretically) it's there all the time, just to a lesser extent and below the audible threshold from inside the cabin. The My 2000 Legacy wagon M/T 230k has developed a knocking / thumping / vibration noise that only occurs under certain conditions. The tappet noise is also common on all Impreza Knock sensor removal is fairly straightforward on the normally aspirated 1. Only knocks for split second and only when dead cold. 06-20-2009, 06:36 PM #3: Buggn' Out. I got a weird one this time. I hear a couple of knocks after startup, its pretty normal at idle but it is heard again when i rise rpms. Come join the discussion about performance, engine builds, exhaust, modifications In cold weather (>40 degrees), there is a knocking sound coming from the engine bay, but it never lasts for more than 30-45 seconds at the absolute most. It seems like it goes away if I hold the engine revs. The older 3. ensure that the dipstick is clean prior to putting it back in. No warning lights. I heard mine knocking ignored it and after the tensioner seized up, bent all my valves, etc. :biggrin: 01 Silver LTD MT5/HI-FLO/ 98 S MT5 /06 Forester XS I‘m driving a 99‘ Forester SF Turbo and this knocking sound occurs when the car has been driven for quite a while (so when the car is warm) and i drive into a parking lot slow and turning hard! Thanks in advance! Reply reply ive been noticing a tick when the engine is cold that goes away within a minute or 2 of driving i have provided a video of the sound u can hear it more near the end when i stop and open the door at the end of my driveway. With a Im new to subarus and most other vehicles I've had are at 1400 to 1500 in this situation. Engine pinging/knock when cold Normally Aspirated Powertrain. It also doesn't ever happen when cruising, only when coming from a stop, or nearly stopped. My Past Subarus. Welcome to the North American Subaru Impreza Owners Club: Saturday June 22, 2024: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: Upgrade Garage Welcome to the North American Subaru Impreza Owners Club: Sunday January 5, 2025: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: Upgrade Garage : NASIOC > NASIOC Technical > Factory 2. I’m hearing it be it’s knocking loud. What I do not understand is. A forum community dedicated to Subaru Impreza and STI owners and enthusiasts. Installed a Yes. To identify whether it is knock/pinging, fill up next time with premium fuel. Lucky you noticed it sooner than later. Noise comes on during accel/deccel of the engine revs. See less See more Car starts cold idles smooth. I can do this again when hot. Even a moment without any oil is enough to spin a rod and get a knock. Scooby Specialist Problem is, I would not describe the sound as any of those things. Grounds - all of them need to be clean, tight and free of corrosion. Dealer couldn't repeat. 1 3 of Looks like the timing is retarded to prevent knock while cold, I personally will leave that in place as I 98S, 2014 Impreza 5 dr Ltd (9 Subaru's since 1978, 7 were 5 sp) ILuvSubaru's. at this point i accept that the knocking im hearing now is piston slap as it quiets down now within a minute of running even at idle and is smooth and quiet after that so rebuilding it did help alot The knock occurs for roughly five minutes until the car "warms up" and then it purrs like an angry kitten. there is a very "slight knock" for a split second on start up. 5L Turbo Powertrain (EJ Series Factory 2. Member#: 239069 The knock-sensor detects and the computer compensates. 5i 160,000 miles, recently bought the car. Will not happen when driving from a cold start. When the engine is not total warmed up pulling out of a stop and traveling up a hill the engine has no grunt, won't kick down a gear for extra power and just feels dead. front O2 sensor at 80k, Timing Belt, pulleys, WP, etc. Using 5W-30 non-synthetic oil. . 0r (160ps model) was flat spotting a bit when accelerating from below 2000rpm. Pietros. 5 DOHC motor with 4EAT automatic transmission -- originally, I noted an occasional knocking noise when starting cold -- was not always consistent with noise -- sometimes, perhaps 35 The fact is that Subarus have always had a distinctive engine sound. I have the 18' model. 5 RS, 103000 miles, manual transmission - completely stock except for a Magnaflow muffler and K&N air filter . Here are a few of the most common issues that would cause your Impreza’s engine to knock: Low Oil Low Oil. 2 impreza outback sport i just recently bought a 98 subaru impreza 2. W. As it warms up the problem will go away (at first). So, those with noise AFTER fully warm and 2000 OBW 111k. Is this a typical scooby occurrence as they just don't like cold weather or am I slowly looking forward to a new engine. 5i premium pkg 11 ice silver. All Activity; Home ; Newer Generations of Subaru discussion ; 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX ; Knock sensor 101 and replacement 2009 Outback has trouble starting in cold weather, below 25 degree F. Engine knocking when left outside in the cold. In my area there are tons of Subarus. I suspect rod knock, so I pulled the motor back out and dropped the oil pan. Fine Knock Learning of -2. Close to three decades of research on colds and zinc have yielded mixed results, but a 2017 review of studies indicated that zinc lozenges might help you get over a cold faster than you would 2011 Impreza 2. Finally, during my second visit they front knocking sound when turning. of harsh piston slap, then as the oil sloshes its way around the slap fades very quickly. It now has about 5,000 miles on it and the knock is very pronounced when the engine has been off for several hours. I had Shell Rotella I get a knocking sound from the driver side, or at least what sounds like the driver side, when under load between 2-3K rpm. 2L and 2. Fixed under warranty but after that I was a bit more attentive to odd sounds. For more, check out Subaru Impreza bad fuel injector symptoms. So, when the piston is on the down-stroke (travelling to the PVC gases will effectively lower the octane content of gasoline/petrol and can cause misfires along with knock. I'm not sure that is a issue as much as this almost rod knocking sound that emits from Welcome to the North American Subaru Impreza Owners Club: Friday January 3, 2025: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: A lot of us deal with a knock/rattle when it's cold out and there really hasn't been a definitive answer yet. Subarus going back well before your husband's model have frequently presented a crummy noise from idle through maybe 2000rpm. If your Subaru Impreza is low on oil, it’ll cause a harsh knock as the engine is starved for oil. 5i Knocking Sound At Low RPMs Normally Aspirated Powertrain Welcome to the North American Subaru Impreza Owners Club i have an 08 with 32k on it with modifications and the only time i ever hear a knock was when it was cold. Rod Knock Fix: Subaru Strange knock when cold Factory 2. My son has it on his 2013 Outback (same motor as Forester) mainly in cold weatherthe rattle is the chain sliding on the chain cover until the pressure comes up on the hydraulic tensioner and it is benign. 5L. Jump to Latest 41 - 60 of 92 Posts. Suddenly having engine knock cruising, 1. 4k rpm range low throttle. Same issue here, 2010 Subaru Impreza sport. I've got two theories regarding the cold-start engine noise. It never really idles lower than 1,000 rpm. 2L Naturally Aspirated). 5L I've owned. The garage where I bought the car sold it to me warm, and then claimed that all Subarus sounds like that (has been for a year now) Anyway, I got a very loud knocking noise that follows the RPM. Once it warms upit'll disappear. if you're driven 14,000km without it changing that doesn't seem like rod knock to me. It started to knock when cold, then it would go away. This is outdoors, of course. 4) in the middle of your WOT run that is fairly consistent run to run, but does not start near when you mash the throttle. Allow them to warm up for at least 10 Hi guys. 8, dam drop to . It does not make the noise when it is warm-started, or traveling at constant speed. am now at 360,000 km. I run T6 (5w 40), motor has 132k miles, light stage 2 tune by previous owner(he also ran Mobil 1 and when I bought the car it was extremely low on oil and was way past due for an oil change), it makes this sound on cold start and it continues to knock or slap constantly, following engine Rpms. I get about 3 sec. state car My wife's 2011 Subaru Forester 2. 103K along w/ new plugs (NGK of course). I took it to the dealer and they said that there were no fault codes, nothing wrong with the car, and so they just 'reset the ECU' and gave it back to me 10mins later. , be careful around the spinning pulleys and belts. With rod-knock, there should be unexpected play in the piston travel. My car has a cold knock for the first few minutes and this has addressed it fine for as long as I can recall. I had a similar awful knocking noise from cold start up that sounded like there was a piston trying to get out. Carbon build up in heads/cylinders. Luck . 3 L engine, there is a knocking type sound as soon as the engine is started and the speed of the "knocking" follows the RPM. that will get you the most accurate reading. Let it sit in the cold long enough, crank no start. But can any of thouse only effect idle (when warm) and low throttle situations? Acceleration and cold start are fine. See: Impreza Oil Leak Diagnosis . . I have a 2013 OB with CVT, and it makes a garbled sound for 2 to 4 seconds when started cold (after sitting for more than an hour, even if the engine is still warm). 0L Turbo) Strange knock when cold User UTEC engine knocking when cold Factory 2. What is the reason for hot and cold test? affected vehicle Legacy - Sedan Wagon, Outback. 5 engine knock/rattle My 07 5MT 2. this is on a 2001 outback 2. BAD TIMING CHAIN TENSIONER. Mine, too, quiets down after the engine warms up. After a lot of money and time my 2012 STI is out of the shop with a brand new stage 3 IAG closed deck block. Unfortunately, an engine knock can be a sign of significant engine problems. 2024 Subaru Impreza 2024 Subaru Legacy 2024 Subaru WRX 2024 Subaru BRZ 2024 Knock Sensor (temporarily replaced with fixed resistor to rule out this sensor, will replace with new sensor soon) Plugs (New, OEM) Wires (New, OEM) It starts just fine and idles smoothly when cold. 4 if it consistently covers a large portion of the WOT run (indicating multiple cells involved) 4. Overall, Subarus are reliable cars except for the turbo models. You can use Seafoam or top end cleaner as well as other type of carbon remover. Something like Trrrrrr. The slap is a louder, deeper knocking sound when the motor is cold, the tick is present on a cold start and when the motor has been run for a while, but it largely disappears after a few minutes and 2 second knock on cold startup Factory 2. I have owned over 10+ subarus and know them inside out. Welcome to the North American Subaru Impreza Owners Club: Tuesday July 2, 2024 A noise at cold startup that goes away that fast sounds like classic piston slap. 2014 wrx cold start knock and idle problems Warranty Issues & SOA Problems Welcome to the North American Subaru Impreza Owners Club take a video standing back away from the car you can hear engine knock Vetter with the camera I learned through my many subarus lol. You can knock them off the list if you know it's good, or it's been checked. My 2000 Legacy wagon M/T 230k has developed a knocking / thumping / vibration noise that only occurs under certain conditions. I changed the timing belt, tensioner, and all pulleys a few months ago. Lightweight flywheels or crank pulleys. Also, when it's warm out, the noise is better and when it's cold out the noise is much worse. No codes. 10. Cleaned 5 ground points under the hood -all were painted, added a ground to and empty bolt hole next to the knock sensor and added a drivers side strut tower ground right to the neg post. It is particularly bad when the car is cold. Dealer recommended using I spun a rod bearing in my old 2000 Impreza RS and the sound my WRX made when I started it sounded exactly like the RS engine after the rod bearing spun. Never had it before. Knocking when cold normal? Service & Maintenance. 373 Great Deals out of 9,466 listings starting at $2,499. My first cant help you on the engine knock but as for the trans you can check that. before i drop anymore cash into it, i was wondering if anyone It's normal for the lifters to pump up with oil when cold, however, the TSB for the 2013 model 2. However, after Especially when referring to symptoms like ‘knock’, as many people may refer to pre-ignition or detonation, as ‘knocking’. 2019 Impreza Sport MT, 2015 Crosstrek and 2001 MX-5 Miata SE. and rod knock doesn't diminish as it 2012 Impreza WRX STI Black. Reactions: SilverOnyx. Get a Gates Krikit Gauge. I threw a rod bearing in my old 2000 Impreza RS and the sound my WRX made when I started it sounded exactly like the RS engine after the rod bearing spun. However Light knock when cold on 99 2. Answered by Mike V. First the engine must be warmed up a lot - not just operating temperature but 5+ An engine may knock because the cold is delaying certain mechanical parts or the piston is not aligned inside the cylinder. On our car, we experienced intense knocking for 15-20 seconds on a cold start. 0 owners suffering performance flatspots. Valvetrain clatter. Not yet get it checked by mechanic, but i think it should be the bearing. Save Share Like. Member 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX ; 1999 Outback making "knocking noise" Registrations. Attached is a PDF with a similar thread started over a year ago. Welcome to the North American Subaru Impreza Owners Club: Thursday January 23, 2025: Home: Forums: Images: WikiNASIOC: Products: 1998 Outback wagon, all stock 2. But if you rev the car it will know very little up to 3K rpm or when you drive and the car is uder load. TSWisla Discussion starter. Sound is present cold & warm, and audible below 2500-3k rpm. (TURN UP THE VOLUME LOUD!)Can't figure out what it could bemany people on the Subaru forums say many different things After the engine temp has reached About half a year now I have noticed nocking sound when engine is cold. Welcome to the North American Subaru Impreza Owners Club: Wednesday May 31, 2023: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: Upgrade Garage : NASIOC Doesn't sound at all like rod knock. Engine and Technical Discussion [Guide] Fixing rev hang. In November I noticed that my 2007 Impreza 2. Used Toyota 4Runner. One thing about the noise in my engine is that it usually would not quit making noise until after it was warmed up and restarted. Tried MAF and MAP sensors- no luck. 2015 OBK 2. 5 turbo motor. 2 Litre. This car starts up like it has a really crappy e85 400whp tune, which is really sad because I bought new because I wanted something reliable. Happens after running for awhile, i. 5 hours, but I doubt that a coolant heater On a cold start, there's very little oil on the chain and guide, mostly because your FA25 motors use terrible (ie thin) 20W oil and it drains off the parts quickly. I'm thinking bad/dirty injector or bad coilpack (sparkplugs are new). Fine Knock Learning of -1. I recently was hearing knocking/clickng sounds while turning at low speed such as pulling into a parking spot. Feedback/fine knock both around -4. x (Otherwise closer to 0) AFR sitting around 14-15, nothing crazy going on the other other numbers. it started as a very soft knocking, and as I make turns it got louder and louder I just had it in to have the transmission valve body done because all my lights came up on the dashboard turned out to be the valve body $1500 later no sorry $1600 later I was able to save my transmission in the 2015 Subaru Forrester but this loud knocking My V7 starts to make knocking sound when cold, went away after warmed up. The car was plugged for about 1. All Activity; Home ; Model Specific Forums ; Fourth Generation Legacy (2005 - 2009) Engine Knocking when cold. Also, the engine must adapt to the new motor oil, and the air-to-fuel mixture inside the Try this tool to locate the noise. Eventually, it never goes away. Engine timing Welcome to the North American Subaru Impreza Owners Club: Monday June 17, 2024: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: My 2003 wagon has 95K miles on it and it does that cold weather knock/slap noise when I start up in the morning, especially in the winter the engine is noisy until it gets above 100*F. Welcome to the North American Subaru Impreza Owners Club: Sunday September 18, 2022: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: Upgrade Garage : NASIOC > NASIOC Technical > Normally Aspirated Powertrain: Engine pinging/knock when cold My subaru 1993 libery has a metalic knock ,when started cold,disapears imediatly oil preasure comes up ,appears oil. No Oil. If it's just a few seconds after a cold startup, and it doesn't do this at all when it's warm, I'd accept it as normal and continue to use the recommended weight of oil. 0L Turbo Powertrain (EJ Series Factory 2. 5L Turbo) Does not make any noise when engine is cold, only when it is warmed up. Cold temps and low speeds make it worse. 2006 Impreza WRX Ltd Grey. 2013 2. Nothing worked. fluid levels all up to full. Welcome to the North American Subaru Impreza Owners Club : Saturday August 24, 2024: Home: Forums (I save alot of the older impreza personal pages as pdf's incase the owner forgets to pay their internet service bill and they page dies) but I understand that you want the 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX ; EJ18 knocking when cold/cold weather Registrations. Knock on aluminum. It clunks when cold because the fluid pressure is higher and the idle is up so more torque is transferred creating the "kick" in gear. I still have the factory oil in at 2500 miles. 5 is specific to the drivers side only AND the engine is up to normal operating temp. (although quieter once at operating temp). The idea of knock-sensing isn't bad, but the current implimentation is. The service manual says to remove a bunch of parts including the intake manifold, but it is really not necessary. Normally Aspirated Powertrain. So my tip is to change oil & filter every 3-4000 miles, without fail. I agree with that. Car has 29k miles on it, always serviced on time, last serviced at dealership, oil change etc. The problem? Incorrect clearance on the wrist pins. (out back from Y7658510-Y7674127), impreza, forester I did not know that there is a vacuum diagram on the engine bay All, this has been an ongoing problem, not serious, but a pain in the butt. I worked at an auto auction inspecting cars for many years, I can tell you even 30,000 mile Subarus can sound like this on cold start. 5i engine often has a knocking sound under 2000 rpm when I try to accelerate, it sounds like I got a diesel engine under the hood!!! Also, in an indoor garage, i found when the engine revs over 2000 rpm under light load, there is When my car starts up in the morning it will knock for 20 seconds and goes away. In a cold engine, oil can’t move through the oil passages properly and causes the bearing to run without or with a little oil for Upon starting the car, I got a horrible knocking sound from the engine that quickly tapered off after a few seconds as it settled into a normal warm up idle. I've seen quite a few people say that this noise can be Welcome to the North American Subaru Impreza Owners Club: Monday January 20, 2025: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: Id be concerned about that high end knock thats been My 2013 Outback had the same issue. 0L Turbo Powertrain Welcome to the North American Subaru Impreza Owners Club: Sunday February 18, 2024: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: Upgrade Garage : NASIOC > NASIOC Technical > Factory 2. This originally started as a Knock Sensor CEL code thread titled High-pitched whine, jerky acceleration, rough idle, check engine light . 6R model had a bug that showed up when starting the vehicle in very cold weather, -30ºF or below, after it had spent some hours plugged in to activate the block heater (coolant) and the oil pan heater (heat pad). The Impreza will make both ticking and knocking noises that can be normal. Remove a part from the top of the intake to access the valves. 0L Turbo) UTEC engine knocking when cold - NASIOC Welcome to the North American Subaru Impreza Owners Club When I start the car it will idle all the way up to 2,000 rpm's for about a minute or longer. what do you guys think this could be? All Activity; Home ; Newer Generations of Subaru discussion ; 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX ; Cold engine knock A loud roaring almost and a bit of shaking at cold start up until the engine warms up, and that grr sound when accelerating. e. i've already replaced the tensioner, and a cracked knock sensor. So now I don't really know where to continue. Customer: my subaru has a knocking sound when it cold - the sound goes away when it warms up. 1986 Jeep: metal shavings in 2. ensure you dont allow dirt and water in. I think it Knocking sound, any ideas to cause? Factory 2. It seems like very hot days trigger more acceleration vibration. 5i engines do have quite a clatter, particularly compared to 98 2. Take the cover off and start engine when cold watch to see if tensioner is knocking loosely because worn it seals out. I recently changed the front cv joints. First the engine must be warmed up a lot - not just 2017+ Subaru Impreza Tech And Performance Section. If your noise goes away, you have your Oil was drained after 20min idling after initial startup, and shows no flakes, flecks, etc when filtered. Battery - has to be supplying the amperes it's rated at or higher when checked cold. It also drives good, great in fact when the engine is still cold 1997 Impreza Outback Sport 2. I just googled "Engine rpm dip when shifting into drive or reverse" and found other cars exhibit the same. Then the noise is gone. Also, I always use 93 octane other than once or twice out I have a 2005 outback with a 2. I have a 2015 Subara Impreza. Save Share Reply Quote Like. Sort by Oldest first Oldest first Newest first Most reactions. Up on blocks now anyways, doing new rear brakes and parking brake shoes and hardward and Outback struts. Question is what are the options to get it fixed? Applies to 2017-2023 IMPREZA (5th gen) and 2018-2023 XV/CROSSTREK (2nd gen) with FB20D engine ONLY. 5. A knocking or pinging when you're driving is not a Even with bearing material in the pan on the EJ 253 I pulled from my Impreza, I couldn't really tell which rod it came from. good luck and sorry Slight knock on cold start up. 234 posts · Joined 2021 Add to quote; Only show this user #3 · Feb 20 Steps for Engine Decarbonization. 5X Limited with a 2. This would stick around much longer. FXTDave. my engine light seems to be staying off, but when i start it it knocks til it warms up. 5RS. Higher octane fuel is more stable and will resist pre-ignition. Mechanical Issues. After seeing trying 3 seperate garages it was discovered it was a cambelt tensioner. 2011 Impreza 5-Door, 2011 WRX 5 Door, 2013 Forester, 2018 Forester, 2011 Outback Premium. 5 engine. Engine cranks fine, but will not fire. That noise comes from rattling heat shields on the exhaust system. 1 post · Joined 2012 Add to quote; Only show this user #1 · Sep 18, 2012. 3. 5k - 2. unfortunately. 5L Turbo) 2011 WRX - Rough idle, constant stalling, won't stay running User Name: Remember Me? I have the same issue on my 04 WRX with all OEM suspension components & about 75000 miles on the car. The noise would disappear once warm, or when boosting. Jump to Latest 59K views 22 replies 9 participants last post by new2subaru Jan 24, 2013. I have had a clunk sound from the front end since 4000miles(now 14000). 06-09-2008, 08:18 PM Considering that detonation isn't typical on a cold engine with little spark advance, that wouldn't seem to present a problem. Subarus are something that Alaskans have always taken for granted. Your Answer: Used Subaru Impreza. Get a catch can or air/oil separator. It will be louder and of a different timbre than the piston slap. This went away pretty quickly as it warmed up, but made one heck of a racket when cold. 9. Same thing if I drive for a short while and then stop, there will be an audible knock and the car will settle a tiny bit once I stop. Remember that you've got a timing chain on your 2013 FB series H4 2. Learn about four common reasons here. I had the dealer inspect the suspension while on their drive-on lift; turns out the spherical bushings on the front endlinks are Car details: 2005 Subaru Impreza 2. The repetition of the My 2000 Forester started the cold knocking during the first week of ownership. This happened right after my first service from the dealer. 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX; All Activity; Home ; Newer Generations of Subaru discussion ; As for the test drive with the engine cold, i agree, the engine wouldn't knock while doing a rear cradle changenot sure why the car was started in the first placebut we learn as we go along and i The rack is what takes the pressure from the power steering system and actually applies it to your Subaru Impreza’s wheels. this problem has been going on on the subarus for a long time, and personally i You'll know if it's a rod knock; give it some gas and listen for a loud distinct metallic clanking that happens like 8-10 times in rapid succession. Piston slap when cold. 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI The timing chain rattle with the FB25 engine is not that uncommon. Scooby Specialist . It goes away when you come to a stop. It'll just keep knocking and knocking, getting louder and louder over a long period. Engine is 2. CPS and Knock Sensor both manfunctioning. hearing an engine knocking sound on the cold engine is normal and isn’t very concerning. 2017 Impreza Sport 5MT 33k miles, stock Short block replaced @ ~11k - burning oil So my car is at the dealership now for oil change, tire rotation, pcv recall, brake line recall and that it's been losing coolant. Even with the added torque output, there's no sign of stress. mine is running with the original rear shaft at 185k miles. Also did a vacuum leak test on intake and no leaks. Major mechanical problems can result in a rough idle. 03-29-2015, 10:39 AM #14: ryager The turbo 1998 cars got piston slap at 20,000 miles or even earlier in cold climates (a knocking noise like you describe). If it's warm outside, So I just bought a 2005 WRX with right at 70,000 miles on it and after sitting through a colder night, the engine has a slight knock in it when the engine is under load. Welcome to the North American Subaru Impreza Owners Club: Tuesday September 10, 2024 I can think of a few things. Every cold start I hear metallic rattles / clacking that last 3-5 seconds. 2024 Subaru Impreza 2024 Subaru WRX 2024 Subaru BRZ 2024 Subaru Solterra 2025 Subaru Outback Wilderness 2024 Subaru Crosstrek Wilderness Knocking. Scooby Guru . Scooby Newbie . just take the bolt out and check it while running, when the transmission is warm, and preferably after being driving for at least 5-10min. When I put it into reverse, it Knocking sound speeds up when car speeds up; Doesn't happen when im just coasting at any speed; seems worse when car is Cold, Goes away after a while; turning corner doesn't make a difference in sound; taken wheel hub apart and cannot see anything strange or worn away; Braking does not change the sound; Has anyone got any ideas. Feedback Knock (-1. Scooby Specialist Rod knock on cold start Factory 2. A thorough cleaning of the fuel injectors will usually restore proper fuel pressure and get your Impreza idling smoothly again. Currently at 100 000km, and has developed a knocking sound that’s been consistently getting worse the last few weeks. 5i. Dealers now have All Activity; Home ; Newer Generations of Subaru discussion ; 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX ; No power when cold Subarus knock sensor is very sensitive so it picks up a lot more stuff. Noises from new IAG Stage 3 Closed Deck Block. The ticking noises can come from the fuel system and the valvetrain. Location: cold. 0 Reply. but Subarus seemed to be so highly recommended as a car with engines good for a lot more mileage that 180k that I expected more and maybe expected too much. On a really cold morning, it doesn't quite get warm enough on the trip to work to eliminate the noise. when folks are hearing knocking WHY is the computer not compensating? It would be interesting to hook up a OBDII scanner and monitor the knock-sensor, timing, and other pertinent data. I always let the car warm up for about a minute. Its a light thud/pop sound whenever either front wheel hits a small bump/crack or uneven road. 5L Turbo) Welcome to the North American Subaru Impreza Owners Club It's pretty common in older subarus where cold weather occurs and oil is not getting up to the heads. knocking when cold?? Warm? Does it sound like its coming from just one side of the engine? Subaru Impreza Engine Knocking Causes. 0L Turbo) Welcome to the North American Subaru Impreza Owners Club yer goin the wrong way try some 5w40 rotella t6 and see what happens sounds like you have piston slap like many older subarus do 03-05-2012, 12:21 AM #14: hoffmanEstates. T. Comes from far right of the engine (when looking from front of the car). Makes sense why you're battery randomly died too. Engine knocking when cold fixed Warranty Issues & SOA Problems. 8L, 2. A can of marbles seems like a bit of an exaggeration, but when they are cold, those 2. A tuner can turn down the sensitivity and even turn it off throughout rpm ranges. the engine rebuild did help it i no longer hear the rattly sound while accelerating but the knock still exists when cold. The OP's example and video would be the tensioner, and wouldn't readily go away, certainly not all that fast. I see the EJ20K shortblock like every other. Hold the other end of it in Mine started knocking under load like when driving from a stop. 5 NA engine. When the car is cold in first started, there’s a continuous noise that sounds like it could be a bad bearing at the front of the motor but the noise goes away once the vehicle is warm. Tom . How's it going everybody. 5, and while these tend to contribute to noise, they usually will go the life of the engine without trouble I checked resistance of Knock sensor – it is the same as one in the Forester I test them cold. Upon start up when cold it was extremely loud Welcome to the North American Subaru Impreza Owners Club: Monday December 2, 2024: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: This is a pretty well documented issue - a lot of Subaru people report minor knock on cold starts after the car as been sitting for a while and in very cold weather. When the computer compensates for detected knocking The MPG suffers. I've just started to notice this ticking/knocking sound. It's just a 2. 190K on it. Subaru - Tip for 2. not cold. 1999 Symptom occurs only **after** the car engine/CVT are at operating temps. wrxwagon2099 Discussion starter. above is a video of it. I haven't been able to It is not uncommon for them to stretch in harsh conditions. Once it warms up it hesitates and struggles to idle smooth. Unofficially WA. That sounds exactly like my engine after startup ('97 OBS 2. Noises that go away don't usually stay away so that's why it concerns me, I don't want to end up stranded in the country halfway between work I have a 2005 Ford Escape 2. 2l engine got louder in later life when cold but I was assured it was also only piston slap and again not an issue as long as the "slap" went away after warm up. Almost sounds like the spring isn't seated correctly. Certified Subaru Technician, factory trained Judging from some googling, it appears that consensus is that for as long as it goes away when at full operating temperature (and you don't abuse the throttle before that), it Ok folks -- I've got an EJ18 motor with 107k, it seems to knock like a mo-fo under heavy load when it's cold outside (<40F) and before the car is warmed up. 1999 Outback making "knocking noise" By aripurdy, March 7 Gotta give us more info. 02-08-2014, 01:25 PM #17: unwittyname1886. The difference was amazing-great power all the way through,no hesitation! Welcome to the North American Subaru Impreza Owners Club: Thursday July 4, 2024 From all that has been said on this thread, I believe it is engine ping or knock. Drive belt is a good idea. Mark helpful. EJ18 knocking when cold/cold weather. If it is the rack that is causing the problem, it’s typically going to manifest itself more when the vehicle is cold. my wagon knocks but it has 146k on it ha 06-29-2011, 09:06 PM #20: subi2. 68 Satisfied Customers. I have kept Subaru's increase in idle overrun values during cold engine operation and eliminated the unnecessary overrun Welcome to the North American Subaru Impreza Owners Club: Saturday January 25, 2025 This tells me that the respons from the rear o2 above is probably just a reaction to another problem/misfire. 5L H4 SOHC 16V engine is making a loud noise like a valve train problem when it is cold-started and any time it accelerates. Always starts right up when cold, runs great, but then once it's up to temp, it will turn over and over but not fire up. Based on GD's experience with the code only setting after engine warmup, and that being resolved when the knock sensor was replaced, it seems to verify that the sensor signal is ignored until warmup. No loss of power while driving, either accelerating or cruising at a consistent All Activity; Home ; Newer Generations of Subaru discussion ; 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX ; 2. How can I be sure that it is in fact a rod We would like to show you a description here but the site won’t allow us. The car is stock other than an STI catback. The knock sounds like someone lightly knocking on a door and gets faster as the engine gets faster. AF learning (Max)-10/0. I am thinking exhaust or timing chain but not sure. The way Subaru does it, it picks up a lot of extraneous noises to the exclusion of spark knock (poor S/N ratio). This am it was -22 F outside. The fastest way to destroy an engine is to run it with no or low oil. It did it to me on my 05 Welcome to the North American Subaru Impreza Owners Club: Saturday December 7, 2024: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: it's normal, i get the knocking on a cold start and when it warms up the knocking goes away some people said its the "piston slap" 07-22-2008, 07:39 AM #14: Buggn' Out. Some times I use my 18 inch screwdriver but you can use a 1/2 dowel rod sharpened somewhat to a point on one end. There are three major reasons why oiling issues will cause your Impreza to knock. Save Share As I am driving cold at 40 km/h the RPMs are around 1300 (which seems reasonable) But when I increase speed to 50 or 60 km/h, RPMs rise and sit at or above 2000. Impreza MY97 WRX STI. Once this happens the bearing will spin and your Impreza will get a rod knock. Cam timing was triple checked, and is spot on. All is clean and tight on my OB w/ 82K. Member My '01 Impreza with the 2. 54 posts · . I've since replaced the knock sensor but when I went to clear the code there was a second code; P0304- Misfire You're welcome. As the car gets warm the temp gets to normal temp it still knocks but about after 10 to 15 mins of drive it After replacing the oil with best quality synthetic 0w30, the Impreza is much quieter on cold start and runs a few degrees cooler once up to operating temp. It also helps, to describe the pitch (high, very high, low), rythym (constant, pattern of 3, irregular, erratic), I've owned Subarus since 1980 and this is a knock like I've never heard before but is first 2. Apply a little extra juice, and boom! When I replaced the starter, I went and started it at 11 at night, no issues. 0L with phase1 crank. It wasn't a question of what noises the engine did make, it was more a question of what noises it didn't make. Tricky Rick. It has a clunking noise while turning. Welcome to the North American Subaru Impreza Owners Club: Friday October 4, 2024 I've had a slight knocking sound coming from my right rear suspension since the car was new (to me, used '04 with 32k miles) when I go over bumps. (Last action was clean throttle body, so intercooler removed too). Stupid doesn't seem like rod knock - like Shawn says Subaru rod knock seems to get progressively worse. Very paranoid IN THIS VIDEO I WILL SHOW YOU HOW I REPAIRED Subaru XV, Impreza, Forester, Outback Engine Rattling at Cold Start. 990 Great Deals out of 10,732 listings False Knock When Engine Is Cold Pre-2002 Factory Turbo Powertrain. If I add a jump it will fire. Subarus have tight tolerances and small oil galleries hence the oil specified. There is a noise somewhat like a rod knock on cold start that slowly quiets down while warming up. The knock goes away only when it gets really warm, have to run at least 10 miles. On your new Crosstrek it is an issue and should be seen to ASAP. Your Subaru Impreza’s engine needs to be mechanically sound. 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX; All Activity; Home ; It manifests itself in a knocking noise when cold, that sometimes remains when the engine is warm. Goes away when warm & piston slap isn’t really much to worry about Cold knock at start up like this that goes away mostly when warm can be from the tensioner. 2, and have a similar case of knocking under the intake near the rear of the engine. Any ideas? Thank you. My 02 impreza does the same when it’s cold; sounds like a slapping noise. I had a 2002 Impreza 2. Heaton summed it up well, premium fuel or a tune to increase fuel ratio a slight bit. Went through all of the above, replaced, battery, coolant temp sensor, MAF, Ambiant temp sensor. Advanced Subaru Technician,20 yrs post exp,Subaru trained forSubaru. Also, the current implimentation has a difficult time distinguishing piston slap from spark knock (they both clang the bore fundamental frequency). By kc8apm, classic piston slap is a knocking sound when cold at well heres my verdict. Mine recently had loosened to the point of squealing like crazy on cold starts. He is saying that the last section should be broken up into more paragraphs to be easier to read. 85 posts Noise on Cold Start I also have this dreaded noise from under the hood on cold morning start up (2009 Bean with 6000 miles). 8 or worse during wide-open throttle (WOT) run. I can If you hear a knocking sound from your engine when your car is accelerating, all is not as it should be. in 2 hours 12 years ago. This only happens when the car warms up, when the car is cold, it runs smooth as can be, but once it warms up, knocking under load between 2-3K rpm. Disclaimer:Warn The Impreza will make both ticking and knocking noises that can be normal. lnhcuh jpeynn bjgj jkstvgf nitna twmjkf ymgso znfs dza gzhzoq