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Discussion Starter · #1 ·
My M90 seems to be making a chirping sound almost like a belt sound, but its not the belt. It doesn't do it at idle but I hear it when IM driving. IM beginning to think its a bearing. What do you guys think, is it hard to replace bearings in the M90, and where do you buy them? :confused:
 

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when your on it and let off does it make the sound..if so it is the belt. where does the sound come from?? I have a chirp in my car as well...but it is the rear left brake........... when I am driving slowly. How many miles are on your car? could be the SC, is there play with the pulley?
 

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Sounds like the bearings. My snout recently started making a chirp noise that gets more aggressive as you get on the gas...I plan to replace the bearings this winter. However, has your coupler ever been replaced?
 

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Discussion Starter · #5 ·
GTP PWR said:
when your on it and let off does it make the sound..if so it is the belt. where does the sound come from?? I have a chirp in my car as well...but it is the rear left brake........... when I am driving slowly. How many miles are on your car? could be the SC, is there play with the pulley?
It seems to only do it when RPMs increase. I took the belt off and the sound is gone. I put another belt on and it still make the chirping sound. The engine is new, it only has 1200 miles on it. There is no play in the pulley.
 

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Discussion Starter · #6 ·
Dan said:
hmm. are you losing much blower oil?
Good point. Its not leaking, but I never though to check the oil level. The engine was brand new when I dropped it in so I never thought about checking it. I'll check it tomorrow.
 

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Discussion Starter · #7 ·
Allmachtige said:
Sounds like the bearings. My snout recently started making a chirp noise that gets more aggressive as you get on the gas...I plan to replace the bearings this winter. However, has your coupler ever been replaced?
If thats the case for my SC, where do you buy the bearings? and how hard are they to do?
 

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Hopefully you have a hydraulic press handy ;)
Actually, my 95 SSEi is doing the same thing but only at idle. Also checked the coupler for wear, and there is a little bit of play in the pulley. It makes a nice grinding noise at idle but when you hit the gas the squeak and the grinding noise goes away and can't be heard anywhere from about 2600 - 5700 rpm

The coupler is an easy fix if you are somewhat car literate and have confidence. Don't let the term "supercharger" scare you off from doing a repair on your own, because honestly the hardest part is evenly spreading the gasket maker when your finished the job. Also if you do it yourself you'll know how it was done and what was put in, plus you get the satisfaction of doing your own repair and saving money!

Now, ive never replaced the bearings in the intake end of the supercharger because im almost certain you need access to a hydraulic press to press the casing back together. I could be mistaken though, ask around.

Matt
 
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