The Ford Barn - View Single Post - Piston and cylinder clearance / measurement???

Dave in MN · 01-24-2021, 07:50 AM

Michael,
I rebuild Model A and B engines. For an engine that is built for standard service, I hone the cylinders to provide a minimum of .0035" clearance. If the engine is to be used as a touring engine and will see duty under prolonged runs at higher speeds, I hone to .004" clearance. I also slightly increase the clearance on #3 and #4 cylinders as, from my experience, I think they are a bit more prone to scoring. 2 tenths of a thousandths is sufficient increase for these two rear cylinders.
Good Day!
Dave in MN

www.durableperformance.net

01-24-2021, 07:50 AM	#2
Dave in MN Senior Member Join Date: May 2010 Location: Jordan, MN Posts: 1,411	Re: Piston and cylinder clearance / measurement??? Michael, I rebuild Model A and B engines. For an engine that is built for standard service, I hone the cylinders to provide a minimum of .0035" clearance. If the engine is to be used as a touring engine and will see duty under prolonged runs at higher speeds, I hone to .004" clearance. I also slightly increase the clearance on #3 and #4 cylinders as, from my experience, I think they are a bit more prone to scoring. 2 tenths of a thousandths is sufficient increase for these two rear cylinders. Good Day! Dave in MN www.durableperformance.net Last edited by Dave in MN; 01-25-2021 at 11:32 AM.