The Ford Barn - View Single Post - Split Pistons and Pin Clearance

Terry Burtz, Calif · 02-22-2021, 01:57 PM

Jim is correct.

Those pistons need .004 inch clearance between piston and cylinder bore.

Original Ford pistons had the expansion slot continue to the bottom of the piston and the clearance should be .002 inch.

Forged pistons need .007-.008 inch clearance.

Be sure to assemble with the expansion slot on the water inlet side of the engine.

02-22-2021, 01:57 PM	#9
Terry Burtz, Calif Senior Member Join Date: May 2010 Location: Campbell,CA, USA Posts: 319	Re: Split Pistons and Pin Clearance - need help Jim is correct. Those pistons need .004 inch clearance between piston and cylinder bore. Original Ford pistons had the expansion slot continue to the bottom of the piston and the clearance should be .002 inch. Forged pistons need .007-.008 inch clearance. Be sure to assemble with the expansion slot on the water inlet side of the engine.