08-22-2013, 02:40 PM
My D1R Stage 3 supercharger and complete engine rebuild is running very well after ~1,400miles...except for what I am pretty sure is an annoying belt noise.
It is a whistle kind of sound, very noticeable at idle. As rpms go up it gets lost in the other, normal engine noises.
I recently tightened the SC/AC/Alt belt because I had slippage above 4,500rpm. Frankly I don't remember if this noise is better or worse after the adjustment.
I really, really, really don't want to go at this on a trial and error basis because there is so much disassembly required. (You have to take off the whole supercharger to access the cam timing and balance shaft belts.)
So does anyone have any experience with belt noise? Is a whistle too tight or too loose? Do cam timing or balance shaft belts ever whistle? Anyone with a D1R SC ever have this kind of noise? Any ideas for isolating this without disassembly? Could it be something else, like a pulley bearing and if so how would I tell?
It is a whistle kind of sound, very noticeable at idle. As rpms go up it gets lost in the other, normal engine noises.
I recently tightened the SC/AC/Alt belt because I had slippage above 4,500rpm. Frankly I don't remember if this noise is better or worse after the adjustment.
I really, really, really don't want to go at this on a trial and error basis because there is so much disassembly required. (You have to take off the whole supercharger to access the cam timing and balance shaft belts.)
So does anyone have any experience with belt noise? Is a whistle too tight or too loose? Do cam timing or balance shaft belts ever whistle? Anyone with a D1R SC ever have this kind of noise? Any ideas for isolating this without disassembly? Could it be something else, like a pulley bearing and if so how would I tell?
(This post was last modified: 08-22-2013, 03:04 PM by Lear35A.)
