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ACCEPTABLE tolerances
https://www.slantsix.org/forum/viewtopic.php?t=65264
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Author:  Mongrel147 [ Thu Aug 27, 2020 2:32 pm ]
Post subject:  ACCEPTABLE tolerances

I have measured the bores in my /6 for size and roundness, high in the bore and lower. Came up with a big bore diameter of 3.4060" and a small bore of 3.4010" I'm hoping to hone the cylinders and use stock size rings. Any comments, suggestions. Are these acceptable tolerances?

Author:  SpaceFrank [ Fri Aug 28, 2020 11:17 am ]
Post subject:  Re: ACCEPTABLE tolerances

My '64 FSM lists the max allowable out-of-round as 0.005" and max allowable taper as 0.010". I think you're good to go.

If you see that full variation at one height in a single bore then you're right up against the out of round limit, but even then I wouldn't sweat it for a stock-ish engine.

Author:  Doctor Dodge [ Fri Aug 28, 2020 1:04 pm ]
Post subject:  Re: ACCEPTABLE tolerances

Vote #2 to re-ring / overhaul the engine & run it.
To be honest, I have successfully re-ringed SL6 engines with even more wear, with good results.
DD

Author:  Dart270 [ Sat Aug 29, 2020 1:39 am ]
Post subject:  Re: ACCEPTABLE tolerances

I agree.

Lou

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