I've found these forums really helpful so thought I'd ask here about an issue that hasn't turned into a problem yet but I'd like to hear your thoughts. A couple of mechanics have mentioned the strange noise the engine makes when revved. You can notice it more the higher the revs. Had to explain but I did a video which around half way through I revved up and it becomes apparent. Just concerned it might be causing damage somewhere. It's not something new though. 

YouTube clip

Sounds awfull!

 

Remove the auxiliary drive belt & see if the noise goes away, if it does then look at the one way clutch on the alternator pulley and also the A/C pump pulley shear plate.

 

If the noise remains & is something internal then you will find out fairly quickly, its possibly a misaligned cambelt cover, was the belt replaced recently?

1 hour ago, J.R. said:

Sounds awfull!

 

Remove the auxiliary drive belt & see if the noise goes away, if it does then look at the one way clutch on the alternator pulley and also the A/C pump pulley shear plate.

 

If the noise remains & is something internal then you will find out fairly quickly, its possibly a misaligned cambelt cover, was the belt replaced recently?

It was replaced before I bought it over 4 years at least. I've been unaware that the noise was irregular so can't really say when it started or if it's gotten worse.