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Old 01-24-2021, 08:39 AM   #5
Dave in MN
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Join Date: May 2010
Location: Jordan, MN
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Default Re: Piston and cylinder clearance / measurement???

Quote:
Originally Posted by Rodrelic View Post
The Model A Ford Restorers org has specifications page shows a difference of .0015 of stock bore/piston.
https://model-a-ford.org/resources/t...pecifications/
Rodrelic,
From the link you provide, I can't find the reference you refer to that states a clearance of.0015" between piston and bore. I speculate these numbers could be for split skirt pistons. The solid skirt pistons currently available require more clearance than .0015".

I have repaired a number of engines using solid skirt pistons that did not have sufficient clearance. Scored pistons and scratched cylinder walls are the found problem along with all the metal shards in the bearings....expensive.

One of my customers made a statement after I repaired his engine:
"If they had opened up the clearance then, (when the engine was built) I wouldn't be opening my wallet now." True.
Good Day,
Dave
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