What are the largest Thrust Bearings you can use on a CooperS main

Centre.My crank has a groove in the corner and will need severe machining.

This was meant to be thrust washer. Too many beers.

Chris, new thrust washers come in std, +.003" and +.030". The steel back of the washer can be surface ground (some) to get your desired clearance if these sizes do not do the job out of the packet.

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Steve

The corner of the crank has a step in it. A big shame as the crank has standard thrusts and 10 bearings, being a genuine crank.Not sure if you can weld and grind the crank.

You would need to present the crank to the machininst along with the center main bearing cap and a set of the .030 over thrusts.

But before you get the thrusts, work out if the damage isn't too great to be machined out.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

I would not get it ground right out to fit .030" thrusts, I would stop grinding when it's cleaned up, and surface grind the back of .030" thrusts to suit.
Reason- +.030" is thickest size you can get- what will you do for thrusts next time..

[edit] and if it's going to get a rev past 6000, .003" endfloat is NOT enough on a 1275. You want .005-.006" at least. I found out the hard way.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.