I rebuilt my M90 rotors at home

**vsl67** · 09-05-2009

Ok I have copied and pasted most of the info I put on the l67 forum leaving out our verbal bull**** sessions in between and the following my not seem to follow on ,if you want to read everything in full just sign up to the forum you will be welcome there we have a few American members already & it doesnt cost anything so heres goes -

Im getting so sick of my rotors making a noise I pulled apart the old set to see how hard it would be to replace the bearings ,I found they are sealed in by the factory and the alloy edge cracks when you remove the bearings so Im going to talk to an engineering shop about tidying the edge back up and see if there is way to keep the bearing firmly locked in ,because I would say that the reason they seal them in so good

The bearing numbers are the same number as the one of the snout bearings and the smaller idler pully No 6203 as for the seals they look in perfect condition but I going to find out if they are avaliable any

Also Im going to look into getting the rotors recoated ,if I find anything out I will let everyone know

**DnaProdigy** · 09-05-2009

Originally Posted by vsl67

Im getting so sick of my rotors making a noise I pulled apart the old set to see how hard it would be to replace the bearings ,I found they are sealed in by the factory and the alloy edge cracks when you remove the bearings

Is this a common occurrence? I'm going to rebuild my Gen 3 M90 sometime in the near future. Its my DD so if something like this happens i will be in quite the bind.

**vsl67** · 09-05-2009

Originally Posted by DnaProdigy

Is this a common occurrence? I'm going to rebuild my Gen 3 M90 sometime in the near future. Its my DD so if something like this happens i will be in quite the bind.

As for the bearings Im not really sure what generation supercharger Holden uses but the bearings down here are sealed in the case and only a minnimal material breaks away to release the bearing ,there are only two reasons I can think of why these are sealed

1 It is done as a parts sales excersise at $900 + for a set of rotors you see what I mean also it strange other manafactures have key ways for rotor aligment aswell as there bearings are removable and use very similer designs

or

2 It is done to stop them from moving forward ,I have checked this out and cant see how they would move as the rotor holds them into place tightly and the outer bearing seat is tight but having said that you dont need a real lot of pressure to get them in ,so just to be on the safe side I locktited them but if you are really worried about it, you can do take the bearing block to an engineer get this done see picture

I havent done this several engineers and bearing suppliers assured me they wouldnt move once locktited in and I will have a challenge if I ever had to get them out again but they still will be removable

**DnaProdigy** · 09-05-2009

Originally Posted by vsl67

As for the bearings Im not really sure what generation supercharger Holden uses but the bearings down here are sealed in the case and only a minnimal material breaks away to release the bearing ,there are only two reasons I can think of why these are sealed

\

I am not concerned as much with holding them in, i could defiantly fab something to do that, more concerned with the alloy on the case cracking. If that happens id have to get someone who welds aluminum or a new piece altogether.

**vsl67** · 09-05-2009

Originally Posted by DnaProdigy

I am not concerned as much with holding them in, i could defiantly fab something to do that, more concerned with the alloy on the case cracking. If that happens id have to get someone who welds aluminum or a new piece altogether.

If thats the case get an engineer to remove the the lip by either something with a small sanding disc (like on hand drill ) or something on a bench drill that works like a lathe and only take off enough material to remove the bearing

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