s2konroids

I have what appears to be a bearing noise (I guess) kind of like a dump valve noise but slightly higher pitched and quicker in duration - it started when i put the supercharger on but has progressively got slightly worse or shall i say a little more frequent.

Its not apparent on full throttle just partial throttle and only makes an appearance after the car has warmed up say 10mins or so. The thing is, it isn't really consistent.

Do the auto tensioner have a bearing in them? - i would have thought it would be a chatter noise though?

It may not be a bearing noise, and I'm pretty sure its not pinking/Knocking noise.

Supercharger bearing where replaced about 10month ago and noise was still apparent, and I have just replaced the idler pulley today - noise is still there .

Thanks in advance.

martin j

Alternator bearing?

s2konroids

No idea martin, I could try the wd40 trick but I think it only hides the noise for a very short period of time.