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Discussion Starter #1
So over the last few days ive noticed this noise on full throttle!
It seems to be getting louder but strangely the performance seems, if anything to be improved!
Now im not complaining about the performance or the noise (sounds like a supercharger :) ) but it does have me worried
Anyone had this or offer a good guess?
Ive had a good snoop around and theres no boost leaks! And the sound is coming from the pasenger side bulkhead ie.where the turbo lives!
Now bear in mind ive a custom exhaust and air intake ,its been mapped and stray cats removed but this high pitched "whine" is new!
 

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You are right, it sounds like a supercharger.

I suppose to rule out turbo bearings, pop the hose off the turbo and see if there is any play in the bearings.
 

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Discussion Starter #3
Yea that would be a reasonable assumption! I should have thought of that myself!
ill check it in the morning. thanks
 

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Actually, since it seems to follow the revs, I think it is more likely to be alternator bearings or idler pulley bearings,
 

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Discussion Starter #5
Actually, since it seems to follow the revs, I think it is more likely to be alternator bearings or idler pulley bearings,
Best not be the alternator! its only 6 months old! 🙈
 
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