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thanks for the suggestions. it is really embarassing/ annoying to drive down the road with a car that makes that sounds... i will keep on it and eventually something will break or i will figure it...

probably about two months, but in miles it is only about 500. I live close enough to work, so I have just been biking (until I get this resolved).

Yea, it is hard to really hear it in the video. The noise is identical to what it was before the tensioner was replaced. Rattle may have been the wrong word, it sounds almost exhaust-ish. I may try...

I thought it would be difficult, but worth a shot. The motor mounts seem fine, no leaks or tears that I can see.

http://www.youtube.com/brentonnmurray#p/a/u/0/zRwd9nbVTRk

this is a video of the noise. the camera is focused on the belt tensioner, but bear in mind i have tried replacing it... and it did...

a) it is coming from the engine bay

b) the exhaust noise seems like its coming from right up near the engine. it may be the flex pipe, since that is about where it sounds like its coming from
...

i will post a vid of the noise.

@ Skippy- The belts have no cracks or visible sign of wear.

@ Noisy Crow - I was told that he was unable to find the source using a stethoscope, but the screwdriver is a good idea. Whatever is...

Exhaust - The vibration does make sense if the flex pipe is cracked. Would you just visually check for cracks?

Rotional - I should have mentioned that the car does not need to be moving, but the...

Hi all,

I currently have two problems, if you have any thoughts on either of them... please share your thoughts. The car is a 2006 3i 2.0L with an automatic transmission.

a) rattle on...

Sensor two is in the back of the hood (center). Its a bit of a reach, but not too bad.

I just replaced two of mine (49K miles). The entire job took about 1 hour and 1 tool (a oxygen sensor socket, $15-30). My 2006 has three. Two are accessible from the hood and one from underneath. ...

Yep, but the engine load would still have the same effect. My thought is that the load torques the engine and the tensioner mechanism is failing... until it warms up and the (spring/ internal...

Yep. Passenger side. In terms of load, do you mean N vs D? If so, then yes under the load of the transmission is the only time it is heard. Also the cold does make it worse. So you replaced the...

I am getting a rattle in the engine compartment between 1500 and 2000 rpm. Once the car warms up, it disappears (I assume something expands and snugs up). After looking at some threads, I replaced...

Thanks Stock 3, I just did this today and it worked like a charm! $20 fix for a car problem is unheard of, so thanks a bunch for putting this up on the web!