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My SC started rattling very bad .
It's not coupler. I changed nosedrive back in March and evrything is fine with coupler.
The sound comes from rotors and every day it gets louder.
The question is can something from supercharger damage engine if I keep driving with it for a while?

Anybody with SC for sale PM me.
It's 1995 SSEi so I need M62 I guess.

One more question.

I heard that 1992-1994 SC have different throttle body mounting than 1995. Is it suppose to be from 1995 or they interchangeable ?

Thanks in advance .

is it only at idle or at all times?

If you take the belt off and spin the supercharger pulley, what kind of slack does it have...rotational slack or another kind where the pulley is "loose"?

It's not only at idle.I already have experience with it. With adding RPM it gets louder.
The pulley isn't loose.
There is allmost no 'play" when rotating back and forth and there is no loose when trying to pull/push pulley.
It's 99.99% rotor bearings. It's just my opinion of course. I recall now when I was assembling SC back with replacement nosedrive and rotating it with my hands it wasn't allways smooth. Sometime at some point it was like minimal resistance.

check the for sale section, i think someone has the s/c you need for sale (maybe peterg?) if you want to go that route

i have an 94-95 SC for sale, i will PM you

I've sent PM to you.

Thanks for replying.

1993 sle wrote:i have an 94-95 SC for sale, i will PM you

For some reason my PM to you is seating in my outbox since yesterday.
Maybe it gets "Sent" status when person read PM. I don't know.

yep, it means that he hasnt read it

Well,this is nosedrive bearing after all went bad.
Same story as it happened six months ago.Exactly the same. The only question is why?
Is it something out of ballance like pulley or belt tensioner or something else affect it or is it just bad luck.
Im replacing SC this week and just curious if I have to buy another nosedrive in 6 months again.

If a nosedrive is driven too long on bad bearings before the bearings are replaced, it will happen more often.

You don't need a whole supercharger. Just a nosedrive. Replace the bearings before you use it. Nosedrive bearing failure is not common, nor is it caused by external forces like the belt or tensioner.

willwren wrote:If a nosedrive is driven too long on bad bearings before the bearings are replaced, it will happen more often.

You don't need a whole supercharger. Just a nosedrive. Replace the bearings before you use it. Nosedrive bearing failure is not common, nor is it caused by external forces like the belt or tensioner.

Back in March I replaced only nosedrive .Bearing was OK. No play in any direction and after six months it's allmost dead.
I thought it's rotors bearing first so I bougt whole supercharger (will be here tomorrow), so I guess I will replace whole thing and then someday I rebuild those two nosedrives I have and it will be spare supercharger or I can sell somebody who wants to rebuild it .
Still very suspicious to me ,everything repeats exactly the same as in March.

Thsanks for reply anyway

Here's the real deal:


As the bearings wear, they cause more wear on two critical components. The nosedrive housing, which is aluminum, and the input shaft, which is steel. If the wear is enough, new bearings will only buy you so much time. Clearances are critical. As these old suckers age, the problem compounds itself. Not knowing the history of the supercharger you buy is a risk, and that risk increases every year these things age. There will come a time when some die-hard M62 Series 1 fanatics are sleeving their housings and having input shafts machined to keep life in them.

What is the difference between a nose bearing and the supercharger? Where is the nose bearing located? Because im getting the same problem once I accelerate and I come to a stop at a light I hear some loud rattling.

Rattling is typically not a bad bearing. Please start your own topic in this section to decrease the chance of confusing your issue with this one.