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Pistons and crankshaft query - GT6


petegardner_901
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You need to measure the diameter of the piston, , std rebores would be in +0.010" +0.020 not odd

numbers like 73

 

the crank may me marked somewhere but depends who re ground it if at all its been ground.

 

you need to remove a bearing shell if its undersize it will have -0.010" or similar on the shell backing

 

pete

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What has led you to this? You stripped it down, because? 75000 is getting towards the point to think about re-bore & regrind. My car's done 77,000 and it's had two engine rebuilds. :o Before the second I replaced shells and bearings, they lasted a month before I was back to my original problem.

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Its a long time ago I used stepped rings , not even sure if they are available

 

if you cant get a accurate measurement measure the ring gap at top of bore and compare with

25mm down the bore , then you know if its stepped.

 

you must glaze bust/ hone the bores with new rings

 

pete

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