Why does my car make a loud rattle when starting the engine?

“I have this loud rattle as I turn engine on.”source ↗

“Having this rattle like noise when first turn the on after not running for a while an then will startup just perfect but I can’t seem to pinpoint the noise cause it doesn’t happen all the time anybody ever had this noise ?”source ↗

“Start it up, has a rattling noise. Make the noise when idling and when moving. Got louder the past week. Gets louder when revving higher.”source ↗

“nothing obvious once i got in there which was a letdown as it sounds like something you’d see once you get inside.. so i’m not sure.”source ↗

“Cold start tick that completely disappears after 2-5 minutes, 4 oil and filter changes last 3k miles, two engine flushes, Italian tune up over 100 miles, often at 5k rpm, didn’t fix it”source ↗

“4JJ1 whining and rattling, have replaced timing chain and tensioner. Belts are pulled off in video. Hot or cold makes no difference. Runs and drives fine just started making the noise recently. Anyone have any other ideas?”source ↗

“My concern is the deep tapping sound, is that rod knock, piston slap, chain tensioners, or what?”source ↗

“The engine has this ticking that goes faster under load. Is the engine cooked?”source ↗

“It’s started making this noise when I first start it up from cold.”source ↗

“It goes away after about 5 minutes once the car warms up.”source ↗

“I've noticed a quiet ticking sound (sounds like when you spin a ratcheting wrench round) from my engine as it gets up to higher revs, it climbs with the engine sound 7k rpm + then decreases as it goes down.”source ↗

“I am probably going to take it to a mechanic just to make sure but i want to know what it probably is and if its safe to ride around at slower speeds/lower rpms.”source ↗

“I'm wondering if this means I need to replace my tensioner or anything else, TIA”source ↗

“The camry is making a ticking noise, does the car have some serious damage? I'm trying to figure out what's wrong with it.”source ↗

“In the video it is shown that when I rev to around 3k and let go of the gas there’s like a metallic almost knocking sound which makes me think it’s knock but when it’s idling the car sounds fine”source ↗

“sincerely I miss driving my car and don’t wanna sell it plus kinda need it for work :(”source ↗

“Happens when the car sits overnight, on the first startup it started making this weird sound.”source ↗

“When accelerating from a stopped position, the car squeals or squeaks. It does this for a minute or so, then stops.”source ↗

“I hear this ticking sound is this a sound i should be worried of?”source ↗

“for the past like 6 months I’ve heard a rattling/ grinding noise that is especially loud on cold starts, but quiets up after about 2 minutes of driving.”source ↗

“pretty much every time i start it (warm or cold), before it drops to the final idle position around 650rpm it shakes.”source ↗

“The car has no issues driving normally or under load otherwise.”source ↗

“I have an issue and I just can't figure out what exactly happened.”source ↗

“When they get it all back together still made the tick.”source ↗

“It's bizarre that now when you start it up no ticking noise but only an acceleration.”source ↗

“Myself mechanic is scratching our heads.”source ↗

“Super loud knocking that showed up today.”source ↗

“Just shoot me straight I think I know what’s coming for me”source ↗

“this is well beyond the normal volume range.”source ↗

“Sounds like it has no oil in it”source ↗

“I bought this car last week and found out it makes quite terrible noise when cold. After ten minutes of draiving, its silent.”source ↗

“i started having this noise every time I start the car from 1 to 10 Miles I don't know what it is.”source ↗

“I wasn't sure if it was the turbo the ac compressor is out doesn't work.”source ↗

“Trying to diagnose this noise on my 2013 Rav4. I only hear it when I'm in Drive, idling (ex: at a red light). I did check to see if the engine heat shield was loose, it seems secure.”source ↗

“Loud scary underhood noise that is RPM dependant”source ↗

“I’m trying to diagnose a metallic clacking/rattling noise coming from the bottom of my Honda Fit 2007 LX 1.4 i-DSI engine.”source ↗

“this noise is driving me crazy and making me paranoid about rod knock.”source ↗

“it has developed what sounds like a lifter tick from the rear drivers side. Cold start, warm start, doesn’t matter. The thing is, it goes away almost immediately after shifting into gear.”source ↗

“Car vibrates bad, bangs on the plastic underneath i think. Goes away after it warms up. If you push down on the motor it gets louder and if you pull on it it goes away.”source ↗

“I could use help from some professionals, because I am stumped!”source ↗

“In this video, you can hear a rattling noise start suddenly around 2500rpm... It happens in every gear, around that RPM range, and only when I give it some throttle.”source ↗

“At first I thought it was a heat shield rattling but nothing seems loose.”source ↗

“It uses spin on filters already, it's just making a muffled knock sound for a second or two after a cold start while using a micro guard select filter.”source ↗

“Makes this knocking noise at idle.”source ↗

“Goes away once throttle is applied.”source ↗

“Engine codes show cylinder misfire P0302.”source ↗

“Is this the end of the trusty old Nav for me?”source ↗

“shortly after I bought it, it started making this noise on start up. I will note that it only does it when the engines cold, and as you can hear from the video it usually lasts for about 3 seconds or so”source ↗

“Any help I can get on the severity of the situation and the potential cost to fix would be great.”source ↗

“I have asked a couple people and have had very mixed opinions, some people saying it’s just a idle spike and is common in these engines but other people are telling me it’s the timing chain tensioners.”source ↗

“I want to be able to consider the Raptor R but the rattle on startup and long-term reliability just make me nuts.”source ↗

“I had the original v6 Raptor but they tried multiple times with different fixes for the cam phaser rattle.”source ↗

“recently I been hearing this problem a lot where I would turn the car on, and it would rev randomly and sometimes shut off. I’m trying to figure out what it is and if it’s an actual misfiring”source ↗

“So a few months ago my check engine light came on so I went to O'Reilly's and got it scanned. Something with the evap. Rough idle, trouble starting after getting gas and jerky acceleration sometimes.”source ↗

“Any advice would be helpful, I can't afford to take it to a shop right now.”source ↗

“trucks developed a nasty tick about 3 months ago.”source ↗

“dont know if i have a severe rod knock or valvetraij issue or what, or if its something simpler cause these trucks tick from fucking everything”source ↗

“its just a tink tink tink, metallic chatter from the motor, gets worse when hot, ticks a small amount while driving down the road, Ticks the worst when in drive while on the brakes”source ↗

“I have a 2001 Audi A4 1.9 TDI PD130 with 253,000 km (157k miles) and I’m experiencing a few issues that I’d like to see if anyone else has come across.”source ↗

“The car has been hard to start.”source ↗

“While driving, the issue is mainly noticeable in 3rd, 4th and 5th gear. It happens consistently below 2000 RPM.”source ↗

“Today I went to start it and I heard a load pop and then the engine sounded like this.”source ↗

“I felt around and couldn’t feel any air coming out of the headers.”source ↗

“Recently, maybe a couple months ago I’ve been having these metallic humming/settling noises regardless of temperature that lasts a couple of seconds. Only happens during the first start of the day or if it’s been sitting out for a while.”source ↗

“I should add that in the winter upon the first start there is a metallic grinding or scrapping noise which lasts a couple seconds then goes away, not sure if it’s related or separate”source ↗

“No idea what’s going on here. Just finished charging the battery, which reports at least 12v with a multimeter, and above 14v while running (when I tested with it running a week or two ago) so alternator is fine.”source ↗

“Never seen this kind of activity on the dash with all status lights going crazy and the rapid clicking.”source ↗

“that was my first thought, but also can’t remember it ever sounding like that. definitely prefer it to be the battery as opposed to anything else”source ↗

“Hello I am working on a 3.6 pentastar engine it had a ticking noise on the driver side bank top of value cover, customer wanted a new engine but I wanted to see what was wrong with it so I checked the rocker arms and they looked good, I found two rockerarmss with play with the cam lobe off of it when cam lobe is on it doesnt have play, the lifter compresses but it goes back to regular size I read that u can fill will oil to see if they bleed the oil out, but I also did leak down test to make sure head gasket was good values were reading 10% for all cylinders and thats cold, I removed the rocker arms and the bearings dont look bad I could be seeing right past wear but I dont see if if someone could please help me out, I want to try to fix the engine”source ↗

“The metal was flakes and they were magnetic”source ↗

“Car engine makes a knocking sound it's like it's originating from back of engine or top of engine Hyundai getz cdx 1.6l petrol 2006”source ↗

“Can I still drive it”source ↗

“I’ve noticed though, every morning when I start the car it makes this high pitched squeaking noise usually, lasts a second.”source ↗

“Oh gosh, looking it up it seems like a very expensive fix lol”source ↗

“car started to buck like it was gonna cut power.”source ↗

“I drove it like 50 yards at 15-20mph and it started bucking again so I turned it off.”source ↗

“I’ve been told so many different things I’ve lost count. I.E. high or low pressure fuel pump, fuel injectors, cam follower, fuel pressure sensor, etc.”source ↗

“P0087 staring you right in the face and you still got people telling you it's a cam follower”source ↗

“I’m sorry I’m not good with cars at all.”source ↗

“I am trying to renew my registration but it failed due to "loud engine" aka ticking noise.”source ↗

“It sounds like it is coming from the top of the block/head area. I tried opening up the head and adjusting the valve clearance but it didn't help, maybe I did it wrong?”source ↗

“It goes away in cold starts and rpm higher than 1800 as shown in video”source ↗

“I don’t have a Honda but I have a Nissan and my car sounded like that until my alternator broke and I put a new one in along with a belt and an oil change but we could of had different problems going on”source ↗

“only rattles at certain RPMS mostly at 1700-2k rpms stops at higher RPMs.”source ↗

“I just had all the timing components replaced and this noise was there before and after, but I’m trying to prepare or get ahead of whatever needs fixed.”source ↗

“It’s loudest from the back of the motor on the bottom passenger side.”source ↗

“I’ve poked around with the heat shields but I can’t get my hands on enough of it to really notice anything”source ↗

“Hello i have this audi a4 2015 , with this sound”source ↗

“Any idea the cause of this sound ?”source ↗

“after about 20 minutes the car started surging- giving gas, cutting out for a few seconds, giving gas again, repeatedly - while holding the pedal steadily.”source ↗

“today it stuttered the entire drive to work.”source ↗

“anything would be useful- I’m not great with cars and still learning.”source ↗

“However, I started to notice this whining noise coming from the engine when accelerating.”source ↗

“Sometimes my car does this when I start it. The gear selector rapidly clicks and the car drops in RPM.”source ↗

“At times my car will also not start even when shifting into neutral, unsure if this is related.”source ↗

“Yeah it rattles constantly, with the belt off as well. Traced it to the right side lower of the engine and replaced the harmonic balancer with no luck”source ↗

“after starting the car, it sounded like almost a rod knock sound coming from the engine for a little while and then stopped once engine was hot.”source ↗

“Ticking and tapping noise on very back passenger top of intake manifold. It seems to get loud and quiet, loud and quiet over and over again.”source ↗

“So, I have a 2009 manual base and as title says, its got a rough idle.”source ↗

“Once driving, then at a stoplight the 600 to 800 cycle i described before begins again.”source ↗

“Until I turned on rear defrost. It still shakes but idles a little higher, but as soon as I turn rear defrost off, it begins violently shaking, most noticeable in passenger seat and by observing the passenger windshield wiper shake like crazy.”source ↗

“there’s no shavings in the oil and everything is connected from what i can tell it’s a 2021 dodge charger rt automatic i recently hydroplaned into a ditch and hit right in the middle of the bottom of the radiator replaced that”source ↗

“Having a rattle noise when I don’t drive for a while but only on first startup after that you won’t hear noting sounds kike it coming from the front somewhere but can’t really tell anybody ever had this problem ?”source ↗

“It sounds like it’s coming from the crank pulley area.”source ↗

“I removed the belt to eliminate all of the belt driven things.”source ↗

“I’m thinking it may be the timing chain tension, any ideas?”source ↗

“Girlfriend sent me this video showing a new rattling like sound coming from her car.”source ↗

“Starter went out a few months ago, I replaced it but now when cranking it sounds like this. Please identify this sound.”source ↗

“2004 Forester EJ25 just started making noise today. Fluids good, recently serviced. Bad flywheel? Clutch?”source ↗

“Goes away with any gas, no check engine lights besides a lean fuel code”source ↗

“How would I diagnose this and is it ok to continue driving on.”source ↗

“I’m trying to diagnose a rattling sound. It is a constant sound even with the belt off I have traced it to the right side of the engine. I replaced the harmonic balancer with no luck”source ↗

“Slight rattle on startup.”source ↗

“Is this the wastegate?”source ↗

“My 2011 mazda 3 has been making this knocking noise all week. It seems like its coming from the engine, but im unsure.”source ↗

“I have no idea what it could be, or how bad it might be so im pretty concerned.”source ↗

“It recently developed a noise, somewhere in between a tick and a knock.”source ↗

“Not noticeable when engine is cold. Slowly emerges as it heats up, and loudest warm.”source ↗

“I'm a bit stumped by this, and wanted to try my luck here before giving up and bringing it to the very expensive workshop 💸”source ↗

“I have a rattle that happens on some cold starts, I left it at a dealer for 3 weeks and they said they could never replicate the noise, I also hear an idle rattle but that might just be me being paranoid as I never noticed any noise before the cold start rattle.”source ↗

“I've had a squeak lately that I'm guessing is coming from one of the pulleys on my 2008 Acura TL 3.2L (J32).”source ↗

“the fact that it persisted through a brand new power steering pump has me second-guessing my own diagnosis. Anyone dealt with something similar or have thoughts on what else to check?”source ↗

“When I start the car on a cold engine, there is a very noticeable metallic clicking or rattling sound. It seems to be coming more from the top driver's side of the engine. However, after about a minute, as soon as the RPMs drop to normal idle, the loud metallic rattle completely disappears. What's left is just a much quieter, steady ticking noise.”source ↗

“just finished an engine swap and the car cranks but just pops.. i’re unsure of what this issue could be from, possibly distributor? another thing to note is this is a b20 swap on a 95 integra chassis, if that makes a difference? it was also an automatic to manual swap”source ↗

“Took for test drive, noticed it ticking at low revs a few kms later.”source ↗

“My truck started making this sounds this week.”source ↗

“Here I am trying to hold the manifold secure with a stick but no difference. Could this be engine knock?”source ↗

“Oh man, hard to narrow down. We just ran an OBD scan it didn’t mention anything engine related (battery voltage, TPMs etc)”source ↗

“there's this weird ping sound when trying to start, no idea what it is.”source ↗

“I’ve had this ticking with my 2008 Honda Accord V6 with 245000 miles, and it has just gotten worse.”source ↗

“In the video this is what it sounds like after driving for about 10 miles, but sounds much worse during a cold start.”source ↗

“How much of a concern is this? What might be the cost? Could I do the fix myself?”source ↗

“Cold start tick that completely disappears after 2-5 minutes, 4 oil and filter changes last 3k miles, two engine flushes, Italian tune up over 100 miles, often at 5k rpm, didn’t fix it, chain kit + VVTI sprockets replaced, VVTI solenoid & oil mesh next to it cleaned, they weren’t dirty, no glitter in oil, camshaft lobes are OK according to two mechanics who inspected them, car runs absolutely fine minus the cold start tick, doesn’t burn oil, currently running valvoline restore and protect 0w20 along with Oem anti drain back oil filte”source ↗

“it’s hard to explain it just sounds like it doesn’t wanna start like it makes that noise when you try to start a car with a dead battery”source ↗

“What was the check engine light actually for? Like what was the code? That would be a lot more telling in pointing out the issue.”source ↗

“There’s a lot more likely culprits for running rough. Throttle body gunk is normally a prime one.”source ↗

“I noticed this about a week ago it would make that weird noise and basically it takes a extra few seconds to start and sounds like it doesn’t wanna start every time I start the car not sure what it is”source ↗

“My wife's 2011 Mini Cooper S Countryman started running rough and had a check engine light, so I changed the spark plugs.”source ↗

“This time, there is heavy oil saturation on the threads. Am I right to assume that she needs a new valve cover gasket?”source ↗