dravid Posted September 30, 2011 Share Posted September 30, 2011 Hi All I have a 1931 Plymouth PA that I am busy overhauling the engine on. The pistons removed measure to 93mm and are marked on the top P21 10258 and stamped 0.20 min os. I checked a friend of mine with the same engine and his also measures up to the same with the same info on the top of the piston.I have just received a set of new pistons ordered from EGGE Machine and on the box is marked E146. When checked on the site it is for a Desoto V8 with bore size 3 5/8 = 92.1mm. These new pistons are also marked 0.20 on the top but when measured I get 92.1mm. My opinion this should measure to 92.6mmMy owners manual indicates that my car is 92.1mm ( 3 5/8 ) bore size standard so 0.20" oversize should bring me to 92.6mm. Can any body advise on why the piston from my engine and my friends are the same but measure to 93mm. Link to comment Share on other sites More sharing options...
Guest cben09 Posted October 1, 2011 Share Posted October 1, 2011 Oversize is usually .020" /// not 0.20You are measuring an inch built engine with metric mike???Be careful on conversion,,,Ben Link to comment Share on other sites More sharing options...
keiser31 Posted October 1, 2011 Share Posted October 1, 2011 These folks will know what you need...EGGE Machine Company - Parts and Services for Nostalgic Motors Link to comment Share on other sites More sharing options...
HarryJ Posted October 2, 2011 Share Posted October 2, 2011 Figure what diameter you want the cylinders if you need to bore or hone, then contact a good piston shop such as J&E and have a set made up. If there is a Good engine shop near you talk to them. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now