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20T piston ring gap

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20T piston ring gap

Post  rob spence on Sat Jan 13, 2018 4:14 pm

Just sorting the rings out on my 20T engine, anyone know what the gap size should be?

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Re: 20T piston ring gap

Post  Cruiser79 on Sat Jan 13, 2018 4:47 pm

Goddard manual says ring gap should be between .010" to 0.025"
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ring gap

Post  piston 197 on Sat Jan 13, 2018 5:11 pm

Hepolite specify .003" per 1" of bore diameter MINIMUM, for air cooled engines so on a 59mm bore would be approx .008" minimum, so the figure from Goddard's book sounds realiistic, i.e gap at @010" when new and replace @ .025" when worn.

JH
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Re: 20T piston ring gap

Post  rob spence on Sat Jan 13, 2018 6:04 pm

Thanks all.

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Re: 20T piston ring gap

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