Winter is around the corner and I know this is just gonna get worse. When I start the car cold, there is a really annoying sound near the engine..it's almost like the coming from the passenger side of the engine. It goes away when the car fully warms up. I can feel the car vibrating a little from the inside. I haven't done my water pump and timing belt yet and I'm thinking tha might be it. It's not my power steering pump and I recently changed my tensioner but I'm certain that has nothing to do with it. Thanks for the inputs!

 

maybe side motor mount is shot.

 

I actually just changed that and the sounds been coming on befor and after..

 

without actually looking at the car, its very hard to diagnose over the internet.

Did you change the front mount as well?

 

Front and back I haven't..but would the mounts make a sound like that?..and the vibrations go away when the car warms up

 

if the front mount is bad, then yes it can cause a vibration.
again, its super hard to diagnose something that I cant see, feel, or hear.

you'll need to figure out where the sound is coming from.
have some one else start the car and look for the noise

 

Sound is definitely from the passenger side of the engine..it's sounds like a rattling noise..

 

I'm having the same problem I can't seem to pinpoint what is causing this. It does it when I'm in reverse and for a second when I put it in drive but after that it goes away

 

A/C compressor? Alt bearing? (your ac will engage down to about 32F as needed when you are in defrost or full auto mode)

 

Do you have a aftermarket j pipe installed because right after I installed it I heard the same rattling that your talking about I just chalked it up to the light weight j pipe shaking

 

check the heat shield bolts.
This was one of the first problems I encountered with my TL.

 

It goes away once it fully warms up Andorra only happens when it's very cold,.its pretty annoying and somewhat embarrassing lol

 

yes,...that was part of the problem I experienced.


Cold start rattle. Once warmed up, it would go away.
Sound came from the passenger side wheel area.

 

here
https://acurazine.com/forums/showthread.php?t=778285

 

Were you experiencing a rattling sound tho? And it is VERY annoying..I'm gonna show my mechanic the pictures in your thread and see what he says

 

Could it possibly be a timing belt tensioner or idler? I know I am coming up on a timing belt service and both parts are on the REPLACE DURING SERVICE list. Mine as well has a rattling on cold starts, but disappears after the engine has reached operating temperature.

 

i changed the tensioner....that solved the problem of hearing the sound after the engine is warmed up...but this is different...it only happens when its very cold outside..im gonna upload a video later on...

 

I know it all depends on the driving style. but on average and with normal driving, how often should the engine mount be replaced?

 

Search for a TSB that's called (I think) Chirp from timing belt area. My car had a rattle on cold start - and I mean COLD as in the air temp was below 40- that turned out to be covered by this TSB. The problem on some TLs and MDXs is that the mounting surface for one of the pulleys isn't plumb, which makes the T-belt run at a slight angle and rubs up against something else until the block warms up and presumably changes shape just enough to stop the noise. The fix was to install a taper shim behind the pulley, and do a full timing belt kit / water pump replacement.

 

on the intermediate shaft there is a black heat shield
check that

 

I got 118k out of mine....

 

I also had a tick/rattling noise upon a cold start up that would go away after the engine came into operating temps. I did my timing belt not to long ago. When i went to take off the old timing belt it was pretty loose. That may have been what was making those noises.. All noises were gone after the timing belt job.

 

^what year TL, and how many miles on the timing belt? Just curious..

 

hmmm im thinking of doing the timing belt and water pump as well...i also need to do that power steering recall....may just do it all at once before the new year...but thanks!

 

I have a 2006 Acura TL and I did the job at 120k miles. I used the gates kit from amazon.

 

This guy is from acurazine too.. His belt was pretty loose too.