What could this engine noise be???

**James Reid** · 07-21-2016, 11:16 AM

This is driving me crazy I've replaced and fixed a lot of various things but can't seem to narrow it down

....Anybody else have this issue or know what it is

**pajeff02** · 07-22-2016, 01:59 AM

Hmmm. I only hear the rattle right after the revs drop. Last noise I had like that was a stretched belt on a friend's Nissan that was allowing the tensioner to rattle against its internal stop.

***SMWS6TA*** · 07-22-2016, 05:58 AM

I had a hard time hearing anything...sorry

**Whamhammer** · 07-22-2016, 09:02 AM

Originally Posted by James Reid

This is driving me crazy I've replaced and fixed a lot of various things but can't seem to narrow it down

....Anybody else have this issue or know what it is

Other than what PAJeff said, I thought I heard a little piston slap.

Do you have a good mechanic around? Might be cheaper to pay an inspection fee, and have a second good set of eyes and ears, than all of the therapy sessions of not finding out what it is.

**35th-ANV-SS** · 07-25-2016, 04:09 PM

Originally Posted by pajeff02

Hmmm. I only hear the rattle right after the revs drop. Last noise I had like that was a stretched belt on a friend's Nissan that was allowing the tensioner to rattle against its internal stop.

Same here. I would guess it is something within the belt system too. OP - have you checked to ensure all the pulleys are tight? If you take the belt off the tensioner, do all the pulleys spin freely?