I have removed the Eaton M62 SC from a 94 Bonneville from an unserviceable engine. I'm trying to work out if it is serviceable and wondered whether some kind folks out there could advise ...

The puttey turns smoothly, although there is about 15degs of play before the rotors turn (I'm guessing the coupling is worn). The rotors do turn smoothly and without any noise (and hand turning speed anyway). They are grey and clean, but do have some scratches on the rotor edges (about 3/16" across). I've uploaded some photos to show what I mean and

Any suggestions? Is this junk or is it serviceable?

Thanks, Tony Gordon

Moving to Forced Induction.

Looks like normal wear to me. You are right that the couple requires replacement. It shouldn't have any play in it.

I'd suggest before you order any replacement parts, you take the nosedrive off and spin the shaft. If there'* any wobble/play/grinding/catching, replace the bearings in the nosedrive. Replace the rotors' needle bearings regardless. Don't clean the rotors unless there are chunks.

Not having handled a supercharger before, I wasn't sure. Appreciate the advice!

I plan to service the snout, coupler and rear bearings over the winter so that the unit should give a few more years of useful life!

you will need a press for those bearings. if you have an arbor, ur set, if not scout one out.

Yup, I can access a 5-ton hydraulic arbor press and asst. bearing plates ...

I also came across the neat trick in the forum posts of using a grease gun to force out the needle bearings ... nice piece of lateral thinking!

well thats awesome, and i forgot about that grease trick. that mr. wren is one sharp cookie is'nt he.

I can't take credit for that one, but I can say I've used the trick quite a bit. Over a good dozen times in just the last 3 years. The 90 is a little trickier than the M60 though. I use a tap with a long drill blank welded to it to reach down inside the M90.