Piston ring end clearance question
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Piston ring end clearance question
Getting ready to file my rings to fit my cylinders.
Cylinders are stock take off 88, rings are HD .005 oversize.
Manual says .010-.020 on the top ring, that sure seems tight to me, can anyone verify that?
Cylinders are stock take off 88, rings are HD .005 oversize.
Manual says .010-.020 on the top ring, that sure seems tight to me, can anyone verify that?
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Joined: Aug 2008
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From: Connecticut
general rule of thumb for ring end gap is .004" for every inch of bore. As an example a 4" bore should have .016 ring end gap. Better to be a little large rather than on the small side. When on the small side and the engine warms up the rings will grow. if they do have enough room to grow they will break and make a mess. good luck dsv
Thread Starter
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Outstanding HDF Member
Joined: Apr 2012
Posts: 2,938
Likes: 30
From: North Florida
general rule of thumb for ring end gap is .004" for every inch of bore. As an example a 4" bore should have .016 ring end gap. Better to be a little large rather than on the small side. When on the small side and the engine warms up the rings will grow. if they do have enough room to grow they will break and make a mess. good luck dsv
That seems way to tight for me, I am wondering if it is because of the aluminum cylinders with the steel sleeves, maybe they expand more than say a chevy with cast engine blocks.
I have them filed to .012 top, .016 second, factory calls for min of .010, .014.
I am not sure if I am going to leave them at this or go wider.
Cant imagine the manual being wrong.
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