Rattling/knocking in my supercharger

MTTod

Registered User
I've found a few threads on this but here's the specifics on mine. It's an 89 XR7 with about 160K on it. When it's idling you can hear some rattling in the SC. A couple times the idle dropped way down and it was more like knocking.

The pulley does have quite a bit of play in it and the seal looks like it's leaking. I can turn the thing about 45 degrees before anything connects inside the SC. That seems like quite a bit.
 
Hey

I got m90 that when I spin it with my hand and stop it real fast it makes a clank sound. it still spins good and works there is no play before it starts. is this the same problem it is it easy to fix. It is not leaking . The other m90 about rips my hand off when I try to stop it it is tight. So I am thinking something wrong with the first one.
 
That sounds a lot like mine. I've got a 90 SC too and it doesn't have anywhere near as much play. No noise either.

The 89 still puts out the boost and it's quiet at higher RPMs so I think it's ok internally.
 
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