Touareg :: V8 - Engine Valve Clatter Under Acceleration
Jun 29, 2007
Our 2005 V8 makes an awful noise under acceleration. I think it sounds like a valve clatter, but I think I remember reading it was some part in the exhaust making the noise. I've tried all fuel options to see if it was related to what OCT fuel.
I brought it in for service (5 recalls, nice) and they didn't hear it (of course) until I took them for a ride. The tech said he remembered earlier models having some issue.
I don't buy that it's "Normal" because I don't hear other 4.2 V8s making that noise, and I sure has hell don't think a 45K SUV should sound like somethings broke when it revs past 4K.
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I have an 04 V8 and have consistently noted a valve(?) clatter noise under moderate to hard acceleration. I mentioned it to my VW sales associate and he stated this is typical of this engine and that after warm up it should no longer occur. I hear the clatter at any time, warm or cold.
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I'm bringing the car in for a seat belt recall and I'm having them look/listen for a heavy valve clatter under WOT. I noticed this before and mentioned it to them, but of course they couldn't find anything wrong.
BUt it's a very noticeable clatter in 1st and sometimes second, embarrassing actually. The other morning when my GF started it saw a big blue cloud of smoke and she said it ran really rough. Is there some issue with the right bank or any bank on the engine? THere's no way that this engine should sound like that. I thought maybe it was because I was running 87, but most here said they didn't notice anything, and a "knock" doesn't sound like clatter. I also tried running 91 for a few tanks and nothing changed.
We actually like the car, but the amount of problems has been a little disheartening. I think more that when I go to the dealer I feel like they don't even know how to use a wrench.
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We love our Treg, but I am not happy about the clatter (like not lube for a second or two) when starting in the morning. Temps are warm this time of year. Otherwise, everything OK.
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I have yet another issue with my Hyundai Accent. It seems to me that I hear engine valve knocking. Here tech. details:
- This happens around 1100-2000 rpm.
- The car currently has 11500 KM.
- 3 oil changes so far - using Mobil 1 - 10W30.
- I put in regular gas.
- No mods, only bug guard.
I drive slow - slow acceleration and I noticed sometime ago that there was a knock coming from an engine at about 1400-1700 RPM, however now I can hear it anywhere from 1100 to 2000 rpm. I can hear it very well when I drive along curbs and walls since engine sound bounces off it. I have automatic gear box and therefore I don't know how to test it further ( on manual I would have put some load on the engine by switching into high gear and pressing gas - make engine struggle a bit ). It might be noise from injector but I don't know. Also I don't know if Accent 2010 has self-adjusting valves or not.
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Started my 2010 gen 3 Prius 3 the other day and got a bunch of what I thought was engine clatter and the check engine light came on.
The next time I started it, no noise. Anyways brought it to dealer and they diagnosed it and ordered a new manifold.
The next day when the part arrived, I brought in the car. Talked to the mechanic, a great guy, and he explained what happened. Apparently, the clatter is actually the springs rattling in the clutch mechanism of the starter motor/electric motor and not the valves like I thought.
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I have a 2006 Touareg with the V6 engine.
Recently, the oil light / shut engine off light came on, and during deceleration, an odd chirping noise was heard.
Oil level is fine. Previous owner claims to have had it changed every 6k with full synthetic. What the culprit might be?
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I have a 2002 Camry V6. It has about 170,000 m on it. When you start the engine, of course it starts at a high idle speed and every time. And, every time there was the ominous clatter of dry engine (probably rod bearings if i had to guess) for a few seconds until there was oil pressure. Probably not too harmful, but it was one of those things that bothers you?! I'm guessing I am not the only one with this happening so that's why I made this post.
The older the engine got the more this bothered me. It's probably "normal", and if you emailed or called Toyota I'm guessing that's what a tech would tell you, but still...to get rid of this clatter I tried every additive there is. Slick 50, Duralube, Marvel Mystery oil (In my view probably useful only for cleaning-do not use in the gas!) STP. NOT ONE of these had the slightest effect on the clatter.
Then I finally tried Lucas oil additive at an oil change. This stuff claims to stick to the metal inside the engine and protect it during a dry start. Well it DOES do what it claims to do! (This is as rare as chicken teeth in the market of automotive products). No more clatter!
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I took off my muffler this weekend to see if I could make the rasp sound I get from the back disappear. I managed to make some of it go away by manipulating the heat shielding. However today its been raining all day.. and I have no noise at all.. full throttle.. nope.
Windows open and hammering the gas, even shifting I don't hear it. I remember in my 04 R when it rained the exhaust would have a completely different tone. I wonder why in the rain today in my MKV, I cant hear any engine rattle at all?? strange. Will report back if I hear it tomorrow, or when its not raining.
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I have a 2006/2007 prius that on cold start up works its self up to a rattle/ vibration in p mode on charge.
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My 2007 V6 Sonata Has a very loud clatter when I start it. It will last anywhere from 2-5 seconds then it usually goes away. It almost sounds like a baseball card hitting the spokes of a bicycle. It's within warranty and last time I took it to the dealer they first claimed they couldn't hear it. Then they changed their story and said that it was the belts warming up, and they said this is a perfectly normal sound for Hyundais to make. My fiance's family has owned 3 Hyundais and they have never had such noise come from any of there vehicles. Both of my other cars never sound like this.
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I've got a 1997 Honda CRV. Recently when you start it up in the morning there is a terrible clatter coming from the engine. Yet, once the car warms up, the clatter totally subsides and the car runs and drives normally. Turn the car off and then start it again, the clatter comes back - but then in a minute or so the clatter is gone and all is well. I've checked the fan area and belts - nothing is caught in there. Seems like the sound is coming more from the engine. Can't figure it out. By the way - did I mention that the car now has 338,000 miles on the odometer? Other than that, the car runs fine. Is it time to give up the ghost?
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I have a 2007 GS350 that seems to "clatter" when I start the engine after it's been sitting for awhile. The clatter only lasts a couple of seconds but it's annoying....sounds like metal on metal. It does not happen when engine is cold or should I say first thing in the morning. It happens after the car has been driven, sat for a few hours and then the clatter occurs when I start the engine. This started a couple of weeks ago....I have 29,000 miles on it.
Took it to the dealer last week, the service rep told us that this is somewhat common and is due to the high pressure direct injection system on this particular engine. He also said this started when they switched from the GS300 to GS350. I'm wondering why it never happened before. The service rep said there's nothing they can do about relatively new Lexus with relatively low miles.
I've always used premium gasoline, got all my oil changes and maintenance done at the Lexus dealership thus far.
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I've got a 2003 f150 with the 5.4 and 128,000 miles with an engine tick. Its not an exhaust leak I know that for sure. It has came up in the last 20,000 miles. I've used motorcraft 5 20 w/ motorcraft filter. I've tried a kreen engine treatment with no change. Heres the description/syptoms:
-Slight clatter for 2-3 seconds upon cold startup (happens very rarely)
-top end ticking that is loudest and most noticable when warm (quieter when motors cold)
-not timing chains/tensioners etc because the noise is coming from the top end and most noticeable on the passenger side.
-at idle the tick is present-when you rev at idle, the noise goes away.
-Driving (or having the engine under any load for that matter) the noise gets louder.
-Anytime I accelerate, tow/haul, go up an incline the noise gets worse
-Sounds like a "whirring" sound from within the dash.
With all that said I am thinking the lash adjusters are getting noisy. I had a certified gm tech that has 40 yrs mechanic experience under his belt and builds prostreet muscle cars on the side look at it. He listened to it to it and that was his diagnosis as well as its not that bad so just live with it. The noise at idle doesn't bother me, its when im driving with the windows down. The noise drives me crazy and is a little annoying to me.
Heres a link to a video of the sound and keep in mind it is much louder now : Triton engine noise/tick - YouTube
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I have a 2014 Sonata with 22k miles. I love this car but lately I've noticed valve rattle under acceleration. Brought this up with service tech and he said I'm not driving the car on long enough trips to keep it cleaned off. When I researched the GDI very little info comes up for Hyundai mainly vw and BMW. I guess what I'm asking is is the only fix for the carbon build up removing the intake and cleaning the valves manually or is there another way.
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I'm experiencing an annoying problem with the air recirculation value on my Touareg. Basically it will randomly go into oscillations for a coupld of seconds, where is sounds like the vent blowers are either speeding up and slowing down quickly, or the recirculation valve is opening and closing rapidly.
This seems to happen randomly, and usually only lasts for a couple of seconds. I've taken it to the dealer twice but they aren't able to determine the cause of the problem.
Here is my theory for what it's worth. I think it may be the recirculation valve, whose job is to close the external air value from outside air to recirculating internal air when it senses pollutants in the outside air. I think the problem is caused by one of two scenerios;
1) the sensor is bad or failing and sends random signals to the vent controller causing it to open and close rapidly, or
2) The control circuit is not tuned correctly, thus instead of waiting to see if the pollutants it senses is sustained, it reacts instantaneously.
The noise this produces is quite annoying!
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I did a few searches with key words, engine, valves, and knock but didn't come up with any info. I know the reason the valves and engine noise is louder than usual is because the oil has had ample time to gravitate to the bottom of the engine. I remember reading some where that the knocking valves when starting up was normal for the Touareg, but can't find the post.
My question is, the engine is too noisy when cold starting? The knocks go away in less than a min or so, but I haven't had a vehicle make such valve noise when cold starting, except older cars that needed valve jobs... Other than the start up knocks.. it sounds and drives great..
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Does the esp kick in right away or under acceleration does it get a little sideways? MY 2004 seemed to kick in to always keep the truck straight, my new 05 tends to get a bit sideways while accelerating.
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Last week, my V10 started this. It does it in high torque conditions and under full throttle. Seems to hold gear at redline until you let completely off the accelerator. Power loss and shuttering are the main complaints. I will call my dealer to see what they think.
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Occasionally I experience a temporary loss of power when I try to accelerate. I press on the accelerator and nothing happens -- then finally catches a second or two later. Usually it happens at lower speeds as when turning a corner in town or when climbing a hill.
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Speed doesn't' seem to be a factor. When I am coasting and then step on the throttle I hear a faint whine coming from the drive shaft or the right rear end. Faint and only upon acceleration. Is this common? Along with all the other "noises" upon start up.
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