Farm Equipment - How to measure engine bore?

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How to measure engine bore?

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Category: Allis Chalmers
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Topic: How to measure engine bore?

Posted By: CrestonM
Subject: How to measure engine bore?
Date Posted: 18 Apr 2016 at 5:12pm

I was browsing engine overhaul kits and one overbore kit says it increases bore from 3 3/8" to 3 7/16". How do they measure that? Is it the OD of the sleeve? Inside diameter? Piston diameter?

Thanks

Replies:

Posted By: AaronSEIA
Date Posted: 18 Apr 2016 at 5:22pm

Inside diameter.
AaronSEIA

Posted By: CrestonM
Date Posted: 18 Apr 2016 at 5:26pm

Ok thanks! I was just curious. One of those things about engine rebuilding that I never knew.

Posted By: CTuckerNWIL
Date Posted: 18 Apr 2016 at 6:10pm

It should be the Inside Diameter of the sleeve. The piston will be a couple thousands of an inch smaller.

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