Clicking sound while accelerating 99 A6
Hey Everybody,
My 99 A6 Avant with 2.8L Auto trans, is making a clicking or rubbing kind of noise only when I accelerate. To make matter worse it only happens when the car has been driven for a while, the engine is nice and warm and the weather is around 70. It does not do it when the weather is around 60. The sound is only there when I accelerate, not when I idle or coast. Here is a youtube video of the sound. http://www.youtube.com/watch?v=nSBk_pJaXL8 Ideas so far, Differential fluid flush, CV joints (just had the front end checked by a mechanic and nothing came up):(:(:( |
Do you have any misfiring problems? If yes, then check your spark plugs.
If you haven't misfiring problems, then it could be one of the following two: - Dust shield rubbing against the rotor or - a Pulley (However, my ear isn't that mechanically inclined to detect a specific noise via a video clip) |
Originally Posted by chefro
(Post 1312739)
Do you have any misfiring problems? If yes, then check your spark plugs.
If you haven't misfiring problems, then it could be one of the following two: - Dust shield rubbing against the rotor or - a Pulley (However, my ear isn't that mechanically inclined to detect a specific noise via a video clip) |
COuld be A/C related - pulley or secondary fan. You only here it at higher RPMs on a warm day...
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If it is indeed temperature-related, then most likely Bob's got it.
In that video clip did you have the AC running? Or a better question: is the noise exhibited mostly when the AC is on? If it is, then the simplest way to determine if it is AC Compressor-related is to actually drive without the damn thing on to see if it goes away. ------ |
Originally Posted by chefro
(Post 1312776)
If it is indeed temperature-related, then most likely Bob's got it.
In that video clip did you have the AC running? Or a better question: is the noise exhibited mostly when the AC is on? If it is, then the simplest way to determine if it is AC Compressor-related is to actually drive without the damn thing on to see if it goes away. ------ Also can we rule Differential, and CVs out? |
Originally Posted by jassilamba@gmail.com
(Post 1312893)
I will have to test it with the air off. I did turn the fan on. Any ideas where that secondary fan is located (i will google and check the A/C pulley). Did I mention that going through a car wash last night made the sound go away for 5 minutes.
Also can we rule Differential, and CVs out? |
Does it sound like it could be exhaust leak at all. Usually its the other way around, loud when cold and quiets when warm. Just a thought though.
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