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<!DOCTYPE html> <html lang="en-US"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> <title>Engine knock on cold startup</title> <meta name="description" content="Engine knock on cold startup"> </head> <body> <div id="blogdesc"></div> <!-- Navigation ================================================== --> <div class="thirteen columns"> <nav id="navigation" class="menu"> </nav> <ul id="responsive" class="menu"> </ul> </div> <!-- Container / End --> <!-- Header / End --> <!-- Content Wrapper / Start --> <div id="content-wrapper"> <!-- Titlebar ================================================== --> <section id="titlebar"> <!-- Container --> </section> <div class="container"> <div class="eight columns"> <h2>Engine knock on cold startup </h2> </div> <div class="eight columns"> </div> </div> <!-- Container / End --> <!-- Content ================================================== --> <!-- Container --> <div itemscope="" itemtype="" class="container"> <div class="twelve alt columns"> <article class="post standard post-2637 type-post status-publish format-standard has-post-thumbnail hentry category-blog" id="post-2637"> </article> <div class="post-format"> <div class="circle"><span></span></div> </div> <section class="post-content"> <header class="meta"> </header></section> <h1 class="entry-title" itemprop="name headline">Engine knock on cold startup</h1> <br> <div itemprop="articleBody"> <p> I called a Dodge dealership about this a year ago and the service writer told me its nothing to worry about, that the Hemi engine is noisy anyway and if they were to adjust the noise out it would simply come back in time. a. The wife's libby has a pretty bad knock when cold. Mar 14, 2017 · When you rev up the engine, the pitch and frequency changes. I have went back to the Hybrid Technology - Engine knock at cold startup - RX450H - It almost sounds like somebody is taking a small hammer and banging at the On cold starts it has a bad knocking noise that last from 2-5 seconds I had a lot of start up noise when I used a WIX filter for one oil change. Anyways, on a cold start up in the morning or after the truck sits for more than maybe 8 hours, ( I am in Florida) it sound like a nasty rattle, cam chain, rod knock, sort of sound. Lifter tick is a common occurrence in V-8 engines like the Chevy 5. In the summer in stop and go traffic I get bad rattles. Shift to drive or reverse engine seems to pull hard with foot on brakes, like brakes barley hold it back. 0L Turbo Powertrain Perhaps it is the timing belt tensioner getting funky as opposed to engine knock from lack of Nov 13, 2008 · I have a 2000 with a 3. It will also knock after the truck has been sitting for a half an hour, so it is not really a cold engine knock. Replaced with rebuilt engine $8. The 2011 Buick Regal has 2 problems reported for engine knock at cold startup. Feb 13, 2015 · Diagnose noise when engine is at normal operating temperature (Oil at 160°F (71°C) or above). sometime on a quick rebuild . My 2010 corolla ran very very very low on oil. 0 engine knock at a cold start such as on how cold it is, in our Canadian winters, right after startup, sounds 1 Jun 2018 Though there are a number of potential sources for startup noise, with 2618 alloys, cause them to make some noise when the engine is cold. Cold start - minus 4 c last night and 2 inches of snow (that's cold for here!). Many manufacturers equip diesel engines with glow plugs to aid in starting the engine in cold climates. It improved slightly when I went to a better oil filter (wix/napa gold or toyota would be the ones to use - they have a better quality anti-drainback valve). Upon restarting after the initial start up and the engine is warm it stops completely. Engine knock noise on cold startup 2006 Hyundai Sonata on cold startup the exhaust puffs blue smoke and the car knocks almost like a lifter noise for about 30 seconds or so. VALVE TRAIN If the noise intensity is more than a lightly audible Lash adjusters can make a ticking / tapping noise knock at hot idle under 1200 RPM at engine Dec 09, 2010 · It is cold here in Maine. T-SB-0041-13 March 15, 2013 Page 6 of 16 Brief Engine Knock/Rattle Noise at Cold Startup (1AR/2AR) Repair Procedure (Continued) F. Weird Jan 26, 2012 · A cold noise will have to be left overnight for a cold-start test. This isn't typical lifter or valve tick, but a much more ominous, down low knock. Check Current Price >> Overheated and engine knock If your car has almost a quarter million miles on it it is quite plausible that it needs an engine replacement, Especially if it has been overheated. Aug 14, 2010 · 98 Ford Crown Victoria Police Interceptor. HA after they pulled a head,guess what?#8 cylinder was completely scored so now in the Some of the above vehicles may exhibit an engine knock noise that begins in the first 19,000-24,000 km (12,000-15,000 mi) of use. Cold Start Engine Knock I have the same issues. a low down in the engine heavy Dec 13, 2012 · Why does a Toyota Tundra 5. 7 engine knock on cold start up? I have a 2000 tundra and it knocks on startup. I incorrectly used "piston slap" as a blanket term for a knocking noise that occurs in the engine upon dead cold morning starts in colder weather. Check you levels and never trust the oil monkeys at Scarborough Nissan. When this happens, the lifter will tick at start-up until it refills with engine oil. The dealer says THEY ALL DO THAT and that its the valve train getting oil pressure etc. if vehicle has prolonged down time, typically more than 4 hours, vehicle makes a chatter until the timing chain tensioners put tension on the chain. This reoccurs continuously. Currently, it has 95500 miles. The engine runs great and makes good power for what it is. Knock sounds to be in more than one cylinder. Follow the repair procedure below to address this condition. returns). you will need them replaced. In the morning on a cold start, or more prominently after the hot engine has sat for 30 minutes or more, I will here this KNOCK KNOCK KNOCK for about 3-5 seconds upon startup. In this case, the 3. Stopped it and started it again and smooth as a baby. The knock is not prevalent at cold temperatures. Guess Toyota takes you all in the north more seriously, not so in Australia. It did sound like a big end knock but then reading the above I guess it isn't. 6L with 175,000 miles, auto tranny. At cold ambient temps lately (40-50 deg F) it doesn't make sense because pumpability of either should be the same, but I only report what I hear, and the noise is much less pronounced with the 0W oil. This only happens in temperatures below 25 to 30 degrees and lasts for about a minute. Mar 14, 2011 · It's not normal knock - it's pretty damn loud. Immediately following a cold soak startup, some 2009 model year Corolla and Matrix vehicles may exhibit a brief knock/rattle noise from the engine compartment for approximately one second. The knock may be heard inside the passenger compartment or the wheel well area. It has developed a clicking engine noise on a cold start. Apr 13, 2009 · If it's the typical 5. I noticed a knocking coming from the engine (closer to bottom of engine than top) on a cold start. But once the engine is warm the knock goes away. Follow the repair procedure below to address customer concerns. I live in GA so hot is 90 degrees plus. I have a hot season issue too. Now, the latest technical service bulletin is out and it includes 2012 models as well. I noticed a rattling noise ( like marbles) coming from the engine upon startup in the morning only. No knock when I left the driveway. 30 ~ 60 seconds of knock sounds like an eternity. Knock goes away after warm up. 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. I recently bought a CPO 2009 E350 (M272 engine w/updated balance shaft gear). I get this when it is cold outside. Noted below are a 3 of the common causes of ignition-system and fuel-related engine knocking. I shouldnt have used the term "piston slap" when referring to knock at startup in the GEN 1-E engines. Average repair cost is $3,500 at 76,350 miles. The rattle noise happens daily on every cold start and also when the vehicle sits for a while (say 4 to 5 hours). 5L V6, notice a loud rattle the first few seconds after startup. Sitting with engine in drive knocking noise from new engine -seems to knock louder with a/c on like engine is loaded up, shift back to N or P she purs!!! My 1996 has the cold knock with 136k on the clock. I've had it since it was brand new ( had 27 miles on the 5 Sep 2009 Nissan has stated before that a slight tap on cold start up that lasts for only a second is normal and acceptable. There are other TSBs which I wish my local dealer could have done for me, including this engine knocking at cold start. Guess what with the hi-tech brains gm has they determin that it is a bad lifter so they are going to replace the cam and lifters. While it's possible to damage an engine by driving it with too much We often encounter engines that have a cold-start knock or ticking noise. 2 second knock on cold startup Factory 2. The cause of the problem is the rocker shaft bridge has excessive clearance from the factory, which causes the rocker shaft to rotate and is it normal to get knock on cold start with my sti, rod knock only when car is cold wrx, rod knocks just when cold starting my car, sti cold start knock, sti knock on cold start, subaru engine knock on cold start, subaru sti knock when cold, wrx cold start knock, wrx in super cold weather rear end noise, wrx rod knock Hello, I have the car listed above it is a police interceptor that runs very well, smooth as silk. 8 engine. 3-liter Vortec. I'm not talking about hammering on the motor when cold, but accelerating slow and easy, which is when my PF engine is making racket for several miles. Got in, started her up and knock, knock, knock almost like missing. So, we have 0w-20, as an example - which mitigates the problem. Again, I haven't noticed any unusual noise from my engine at all on cold startup. When you let off the gas, it continues and maybe even gets louder. A few months ago, I began to hear a noise that sounds similar to a diesel engine, which begins a few seconds after starting the cold engine. Never had a problem with cold engine piston slap. This information is relayed to the ECU which then pulls ignition timing to protect the engine. But when I start it up cold it has a knock in the engine. your fuel system needs a cleaning. It sounds like an exhaust leak in the front of the engine towards the bottom by the radiator. even with spread the piston skirt. Some light noise is normal. I primarily make short trips ~9 mi, alternating back-roads and highway. That's why we have multi-viscosity oils. For my 8. 3L 178k miles on it. Will stay fixed immediately. It’s a problem we have seen for over a decade– a piston slap and engine knock on cold start with various General Motors vehicles. It only does it when the engine is cold like after sitting over night, and it lasts for about 2 seconds and sounds like an engine does after you change the oil and start it for the first time (until the oil pump builds up pressure). Once engine is warm there is no noise on startup. 5i engines do have quite a clatter, 29 Sep 2013 I have a 2012 Odyssey LX that is being used as a taxicab. I've read it's normal for that engine but find it hard to believe since it didn't make that noise until 70,000 to 75,000 miles. Hey guys I have a Audi A4, 2005 B7 When from a cold start I get this annoying startup rattle for 1-2 seconds then it's gone. When the engine is cold on start up I get a tapping noise that use to last about 15 seconds, now its up to 30 seconds. Some of the above vehicles may exhibit an engine knock noise that begins in the first 19,000-24,000 km (12,000-15,000 mi) of use. It almost sounds like it is running too lean upon startup, when it is cold. Agh it happened to me this morning. Average failure mileage is 34,450 miles. Immediately following a cold soak startup some 2009 - 2010 model year Corolla and Matrix vehicles may exhibit a brief knock/rattle noise from the engine compartment for approximately one second. Fuel Has a Low Octane Rating. In most cases, an engine knocking sound at start up is caused by hardware inside the cylinder head of the motor that is loose or is 27 Oct 2016 The recommended interval for a valve adjustment for this engine is every The second possible source of a clicking sound on startup is the 2 Jul 2018 Models 2015-2018 Cadillac Escalade, Escalade ESV 2016-2018 Cadillac CTS 2014-2018 Chevrolet Corvette 2014-2018 Chevrolet Silverado 31 Oct 2011 I hear a rattling/knocking noise when you start engine, not right away, but like after 15 seconds and it lasts about 30 seconds then seems to go 26 Jan 2017 Johnznot's new Subaru Outback is making a noise. Given their ECM and their new injectors now capable of spreading the fuel charge over several injection events throughout a single power stroke, the diesel knock is gone except when they are cold and have about 20,000 km on them. I do appreciate a normal cold IDI diesel engine is noisy but this is +30% extra. My engine has done 132k and has always had regular oil changes using the correct oil and drives It drove me mad, on a cold start the truck sounded awful. try another toy rep besides the one you are trying to approach and see if you are able to get your problem resolved. Ok, I tried the search and got very little. t out of me. If it's really cold, I will let it run longer to warm the cabin because I hate the cold. 26 Feb 2007 Basically, i am experiencing this knocking sound when i start my engine whe it is cold especially in the morning. Ok, Here's a diagnostic and a how-to for V8 folks that have the following going on with their engines. It doesn’t ever get better on its own, although when your engine is cold, the noise might be lesser. 5k- same thing happening. In cases of false knock, ignition timing is being pulled for no reason, hampering performance. It does do this in even moderate weather after sitting over night. you will get a knock. other possible sources of noise could be the timing chain or minor piston slap when cold. Cold weather will thicken oil in a cold engine. I didn't know what the previous owner used, so I switched to Mobil 1 (car only had 55k on it). It fades away after a few seconds and doesn't do it when the motor is warm, or in the summer on cold start. 5L or 3. Jun 18, 2009 · If the noise is only a lighly audible knock at hot idle under 1,200 rpm, do not attempt to repair this normal engine noise. Sounds to me like a rod knock. The tapping noise the vehicle in 24 Sep 2013 A4 (B6 Platform) Discussion - Engine noise at cold startup - A4 2. at startup after sitting long enough to be a cold start thre was a knocking noise coming Nov 10, 2011 · Well after a little bitching and telling the gm rep that a knock in an engine when cold is BS and even though it goes away when it warms up and gm saying this is a normal issue. Engine knock noise on cold startup these 3. I have gotten used to the high RPM cold engine start, like 1900 rpm's, but the engine rattle that last about one second is pretty loud. You can ask that the service manager be present with the technician at the time of the test. Can this be caused by the oil and/or Nov 17, 2003 · 02 yukon, 5. so it wasn't cold outside, but the engine was obviously cold. The engine may require a cold soak overnight to effectively make a full diagnosis at hot idle, particularly when a VCT phaser is suspected. New CR engines don't knock when cold because their compression is not high enough. Re: Engine knocking on startup. Jun 01, 2018 · A knock sensor is precisely tuned to an engine's harmonics and senses variations which it recognizes as detonation/ knock. Dec 08, 2019 · Diesel knock is a by-product of the raised compression and fuel injection process and is an acceptable result of the ignition sequence. Knock(s) go away after 60 secs of idling. GM replaced the original engine at 15,900 miles for the same reasons (knocking and tapping). Nov 04, 2011 · Q I have a 2006 Honda Accord four-cylinder with 105,000 miles. I usually use my key fob to start the truck and I can always here it for a few seconds almost as if there is no lubriation I had an idiot dealer do my first oil change and they left it a full liter/quart down. Very slight engine knock on 2. Idles in Park or neutral fine. If you put in fuel with an octane rating too low for your vehicle, it can create a knock. 4 Nov 2011 It has developed a clicking engine noise on a cold start. 0 engine knock at a cold start such as in the morning or if the car has sat for at least 8 hours. can this be fixed. I have seen references to Toyota and Lexus V6 cold start engine rattle – 2GR/3GR/4GR The first cold start of the morning some Toyota and Lexus V6 owners, especially those who have the 2. For some reason every time I start up that car after letting it completely cool down (on a cold start) I hear some kind of knocking sound momentarily for one to two seconds then goes away. 0l 7 May 2018 If you have an engine rattling noise, engine knocking, or any kind of engine sound you may be alarmed. « Reply #5 on: December 07, 2004, 05:00:50 AM » Your wrist pins could be a little loose!I also have a 16 valve and they are real cold blooded, I have to turn my heat control all the way off for the engine to warm up and then it takes about fifteen minutes to get to where I can turn my heater on. 26 Feb 2017 Hello there. oil pressure is good at start. Oct 29, 2012 · Info-Engine Knock on Cold Start #01-06-01-022 Information on Engine Knock 2001-2002 Chevrolet and GMC C/K Pickup and Utility Models with 6. It started it near the end of the summer I would say, starting it in the mornings and taking off, noticed it. A cold knock is usually caused by piston to cylinder wall excessive clearence. Verify oil temperature by using a diagnostic scan tool and monitoring the engine oil temperature (EOT) PID. I would hear a rattling sound on startup. k. Either way, some engines are designed to have some cold start noises and it doesn't appear to hurt them. This ticking sound is caused by the valve lifters, which are filled with oil during engine operation. New to the forum. Has anyone actually found the problem or have a solution. Startup rattle may only occur with cold oil. I don't know how rod bearing replacement would help anything, the cold knock is almost certainly a lack of oil/oil pressure at startup. detonation, pinging) one way or the other," says Kavanagh. 3L cold start, engine knock. Sep 01, 2010 · Cold-start knock isn't normal, but it's common Q My 2002 Chevy Tahoe, with the 5. but when they are cold, those 2. Putting heavier oil will help in the long runs, but most damage and engine wear is at start-up, you are killing your truck with that heavy crap, knock it off dude No but really, a light weight synthetic oil with a good additive package will compensate a lot for the little it lacks in protection on the long runs. Jun 10, 2005 · If the 25160560 was "enhanced", do you know why the 25171377 was necessary at some later time? I don't live in a cold weather area and don't believe the truck has ever exhibited "Cold Engine Knock" but, I wonder about excessive engine wear from the Anti-Drainback Valve problem (coming up on only 37K original miles now). Apr 26, 2006 · It usually only makes the noise until it warms up. Knocking on Startup? I started my 05 wrx today in my garage and I thought I heard a knocking that went away or greatly reduced after a few seconds. It 'seems' to be coming from the engine rather than the pump - as if a pump setting/problem is causing the knock rather than anything physical within the pump. At one point, it sounds like the knocking noise nearly disappears. 1 that gets used mostly during extreme cold/snow, I plan on putting in a block heater of some sort to help it to be warmer Jun 24, 2015 · If you have a 2009-2010 Toyota Corolla with a brief engine rattle noise on cold start up then you will want to replace the intake VVT-i gear per Technical Service Bulletin 0087-09. It sounds like it is a top-end knock. Rotate the crankshaft counterclockwise by 10 and loosen the tension of the chain. The optimum viscosity oil for the engine during its normal operating temperature will be too thick to properly lubricate the engine during its cold start-up. try ethanol treatment to a tank of premium fuel on next fill up. A loud metallic rattle dependant on rpm which changed tone to a deep knock when at idle in gear. Return engine speed to idle (verify knock at the top of the engine. As far as tappet noise goes, I haven't noticed any on my car. I started the truck and let it run for a few min. It now has about 5,000 miles on it and the knock is very pronounced when the engine has been off for several hours. It has a vortec 5. interesting if a relatively simple valve adjustment eliminated the clicking at start-up? 9 Sep 2017 I see lots of issues with the KIA 2. Any strange vibrations or sounds coming from the engine should be reduced after the second startup with this additive in your oil. Bookmark How to Quiet the Lifters on Startup by Dan Ferrell Vehicle lifter noise on start-up may be caused by several factors, depending on the type of oil filter, oil, lubrication system, mileage, mechanical condition and even required adjustments of your vehicle. Nov 28, 2009 · My f-250 Has a cold start engine knock for about 30sec. I haven't brought my car to the dealer yet, but the cold start rattle has significantly reduced since I switched to a 0W-20 from 5W-20. 0L Engine (VIN U - RPO LQ4) Some of the above vehicles may exhibit an engine knock noise that begins in the first several thousand miles/kilometers of use. Does go away. @TOYOTA T-SB-0041-13 March 15, 2013 Page 6 of 16 Brief Engine Knock/Rattle Noise at Cold Startup (1AR/2AR) Repair Procedure (Continued) F. . Nevertheless, there are tales on the Internet from folks who say Engine "knock" cold is present on my C50 limited and disappears after about 2 kilometers or so. That scared the s. When your engine sits, the oil can seep out of the lifters. It sounds bad. Aug 18, 2011 · Noise a VCT knock, the noise should disappear). It will give you a better fuel economy and engine performance as a result. Nov 05, 2019 · The BestLine Premium Synthetic Engine Treatment reduces the engine’s friction and overall wear and tear. 7 limited AC. Jan 25, 2009 · Ok a few months back I bought a 2000 Chevy Silverado LT 4x4. On occasion a cold startup produces engine "knock"which dissapears within 5 minutes. An octane rating is the measure of a fuel type’s ability to resist premature detonation of the air-fuel mixture in the engine. The knock noise is most often noticed during initial start-up and typically disappears within the first 5-30 seconds (may last longer in extreme cold temperatures). I have about 6,700 miles on this engine and this is the second engine in my 2000 Silverado. Also, I have heard that the valve timing relies on oil pressure, so maybe that has something to do with it? Some mornings it is very noticeable. A diesel engine is difficult to start in cold weather due to its lack of an electronic ignition system. to maybe 45sec. I have heard the drone at start up and think that may be normal, but a second opinion (dealer) would be best. 5 to 2 minutes it doesnt do it as often when it is warm outside but when it is cold outside it Sep 09, 2017 · I see lots of issues with the KIA 2. STARTUP RATTLE Some 2004 F150 and 2005 F150, Expedition, Navigator, Super Duty, and Mustang vehicles may have a rattle on startup that lasts 1 to 3 seconds. Sep 22, 2012 · I have been having a problem with my truck, it started out as a small ticking sound on cold start up, and now is a loud ticking/knocking noise that lasts about 3-6mins after a cold start. Engine is very quiet after this initial rattle. Jan 14, 2016 · I used castrol 5w-20 before switching to Mobil 1 5W-20 and the noise was never until oil change. What could this be? - Answered by a verified Ford Mechanic May 21, 2013 · "Type of oil has nothing to do with traditional engine knock (a. 0 that has me a little baffled. Engine knock on cold start? My '01 has a loud knock on start up when cold. An M4A sound file is linked under What. Hard to tell though. But I could not find the exhaust leak and it sure sounded like the tapping was coming from the manifold. 3l engines are equipped with timing chains. This is what rod knock sounds like. 1. Rotate the crankshaft counterclockwise by 10° and loosen the tension of the chain. I just picked up a 96’ ZJ for a project. I recently just changed the oil with 5w-30 which is the 3rd oil change I have done and have used the same brand and viscosity. 7 at start-up?? ls it had a timing chain. Ran very quiet until 6 months ago and I noticed a slight knock at idle which comes and goes about every 5 seconds. 3 cold start ticking noise that goes away after few minutes it's a fuel knock when you start engine when it's cold it runs on cold idle circuit which richens fuel mixture that creates fuel knock they all do it just some more noticeable Jun 24, 2008 · 1990 MX-6 naturally aspirated giving a loud knock on cold startup. I shut the engine off and took my other car to work but this is really bothering me. Engine Tapping I my case, (F-150, 153k miles ), I thought for sure it was an exhaust leak because it would tap loud on cold day startups and then go away after the engine warmed. No problems in the warmer months. Mar 24, 2013 · engine knock commonly atributed to resin and carbon build up. todays fuel uses ethanol blend which can leave build up in fuel delivery systems, combustion chambers and cause excessive wear to spark plugs. I've noticed a pronounced engine knock whenever I fire up the engine on my 2000 4. It will not knock for about 5 seconds then knocks for aobut 5 seconds. Corvette: Why is My Engine Knocking? Remember that sound on those old roller coasters on the climb up? If your 'Vette's engine sounds similar, use this article to help diagnose the issue. The symptoms and conditions when the symptoms happen, but the root cause is different I guess. The 2008 Toyota Highlander has 6 problems reported for engine knock/rattle noise on cold startup. I have been runnin it on synthetic blend castrol 10w-40 works great engine is smooth but i get this knock when i first turn it on. Dec 30, 2012 · Why does my engine knock when its cold but knock goes away after its warmed up? So its about 30 degrees here where i live and its rare that it gets that low. 5-liter V6 engines installed in various Hondas ® can make a knocking or ticking noise at idle and only when warm. There have been some threads mentioning bad oil Nov 25, 2011 · 5. It seems the oil is a little overfilled this time (maybe 1/4-1/3 of an extra quart). My 2000 Forester started the cold knocking during the first week of ownership. Damaged engines are one of the most . Each day at the first startup, it knocks loud for a second then goes away, almost like a dry start, and every startup after that throughout the day, it doesn't do it until the next morning when I first start it up again. (video) - Hi there, I wonder if anyone can help My 2004 A4 (2. I own a 99 cadillac deville 32 valve northstar engine v8. Once warmed up, or as soon as driving or revving, the noise goes away completely. Once at full operating temp the truck was quiet, id faintley hear the metallic rattle at times but nothing close to when it was cold. I spoke to Toyota and they said a high milage engine can have piston skirt issues Immediately following a cold soak startup, some 2009 – 2013 model year vehicles equipped with the 1AR-FE and 2AR-FE engines may exhibit a brief knock/rattle noise from the engine compartment for approximately one second. When the temperature is below 55 it is louder and will continue until the engine is warm and you shut the engine off. Very loud and doesn't do it all of the time. Hello Guys. Seems normal as I have heard this sound in Intruder engines after cold startup. This caused knock on a cold morning startup for about 5~10 seconds. 3 engine in it, well it seems to knock pretty bad on startup it tends to knock when its cold outside it knocks for about 1. After refilling with oil the rattling has subsided but still continues on a cold start or first startup for the day. increases with RPM hot or cold and is recognized 5. I am taking mine in for a service tomorrow and will mention this. 0l petrol. When i stand outside of the passenger side wheel well when the engine is cold after just starting it, i swear i hear a slight engine knock that goes away when the engine warms up, or at least is barely noticeable. Engine knock when cold Knock occurs after start at idle and acceleration after 8 + hour cold soak in colder temps (30's -40's F). Sounds like a rod bearing or wrist pin slap, don't like the sound at all !! I've got 130,000 miles on the odometer and have always run on 5w-30 full synthetic. Happens on cold start Sounds like a rod knock or bottom-end tapping noise when you put it in gear with your foot on the brake Jan 14, 2016 · Apologies if this has been asked a hundred times already but as per the title I am getting a knock from the engine for a couple of seconds at the most when I start it from cold before it sounds normal. After the car has warmed up, the sound goes away. '99 3rz-fe. May 24, 2017 · Hey yall, My truck has about 900 miles on it now. But I have a question on a Jeep 4. 3-liter V8 engine and 93,000 miles on it, makes a rapping noise just after a cold start. 5degF this AM. By cold, I mean it only happens in the winter months and only for about 1-2 minutes after startup. Hyundai and Kia have been using this engine in various forms for several years so any issues should be well known. I have my fair share of goods and bads when dealing with those "so-called" rep, most of them are quite self-serving and don't deserve their jobs; while some of them (some Hondas, not all of them though) work alongside with their customers to get the issues resolved. Jun 10, 2014 · VCT phasers may knock at hot idle. only at startup, or when it sits outside overnight and it gets cold, then its like extreme engine knock. 97 model F150 Romeo 4. engine knock on cold startup</p> </div> </div> </div> </div> <noscript><style>.lazyload{display:none;}</style></noscript> <!-- Performance optimized by W3 Total Cache. 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