Go Back  AudiForums.com > Audi Models > Audi A6
Accessory noise please advise!!! >

Accessory noise please advise!!!

Audi A6 The mid-sized Audi A6 model offers more room to the driver and passengers over the A4 line.

Accessory noise please advise!!!

  #1  
Old 05-31-2010, 08:17 PM
Member
Thread Starter
Join Date: Mar 2010
Posts: 47
Unhappy Accessory noise please advise!!!

Hello my fellow Audi (best cars ever made....ever) friends!

My A6 recently sprung a sound that has me scratching my head...

When I start the engine cold with the A/C on it makes a constant clicking sound like a bad accessory bearing or something, it continues to make the sound for the first 5-10 minutes of running. If I turn the A/C off the sound disappears.

Additionally the pitch of the clicking seems to change while turning the wheels back and fourth, and the sound seems to be coming from around the PS pump. I thought it may be the A/C clutch bearing but there is absolutely no sound coming from the compressor area.

I have no decrease in A/C efficiency or any noticeable change in power steering output.

So...engaging the AC while cold produces a sound from the top center of the engine area around the PS pump and changes pitch when turning the wheel. I'm thinking that the extra engine load is the reason for this

Please help if you have experienced something similar to this its driving me a little bonkers lol.

p.s. I will try to post a video of the sound to help out.
 
  #2  
Old 05-31-2010, 11:15 PM
Member
Thread Starter
Join Date: Mar 2010
Posts: 47
Default

Come on!! No love on this one?????
 
  #3  
Old 05-31-2010, 11:36 PM
auditech79's Avatar
Site Moderator
Join Date: Feb 2007
Location: Nor Cal
Posts: 9,004
Default

Have you tried topping off the power steering resivior (with the correct mineral fluid) then turning the wheel lock to lock with the cap off? That will get all the air out of the PS system, so if thats the problem it should cure it. The PS fluid is mineral based which will evaporate over time. You can also try spraying PB blaster on each pulley one by one and see if the noise goes away.
 
  #4  
Old 06-01-2010, 01:22 PM
Member
Thread Starter
Join Date: Mar 2010
Posts: 47
Default

hi auditech, Yes I did do that and with the Audi/VW mineral fluid. Is it possible that the sound is the cam chain tensioner going? would this sound come and go with the AC compressor load on the engine???
 
  #5  
Old 06-01-2010, 03:27 PM
Senior Member
Join Date: Jul 2009
Posts: 208
Default

Have you tried starting the engine with the ac OFF? After the engine warms up turn the ac ON..what happens?
 
  #6  
Old 06-01-2010, 03:59 PM
2nd Gear
Join Date: Jan 2010
Location: Denver
Posts: 772
Default

If there isn't any sound coming from the AC compressor, it probably isn't related directly to the AC. I agree, it sounds like something to do with the engine load. Maybe you have a tensioner that is on the verge and once it warms up is back to normal.
 
  #7  
Old 06-01-2010, 04:35 PM
Member
Thread Starter
Join Date: Mar 2010
Posts: 47
Default

I have tried a couple things like that, like waiting until the engine is warm and it doesnt seem to be as bad. Im letting the engine cool down and about to take a video ill get it on, however I did just remove all the covers and spray pb blaster on the pulleys so lets see what happens
 
  #8  
Old 06-01-2010, 05:08 PM
Member
Thread Starter
Join Date: Mar 2010
Posts: 47
Default

Ok I made a video, after watching I realized I should have just shut up and not talked so much so you can hear the noise more than my voice lol. but I think it gets the point across.

http://www.youtube.com/watch?v=9qm4t1XiPpY
 
  #9  
Old 06-01-2010, 07:55 PM
auditech79's Avatar
Site Moderator
Join Date: Feb 2007
Location: Nor Cal
Posts: 9,004
Default

The video is kinda rough, the only thing i can hear is like a clunky/tapping type noise
which is usually the cam tensioner, but again its hard to tell. It would be best for you to take off the front bumper and put the lock carrier in service position (move it forward basically) so you can get a better look at whats going on. You can also try the old school trick of putting a long screwdriver to each componet and listening to it with your ear on the screwdriver. Kinda like a poor man's stethescope.
 
  #10  
Old 06-01-2010, 07:58 PM
auditech79's Avatar
Site Moderator
Join Date: Feb 2007
Location: Nor Cal
Posts: 9,004
Default

Oh, and when was the last time you changed your timing belt and water pump?
 

Thread Tools
Search this Thread
Quick Reply: Accessory noise please advise!!!


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.