The Ford Barn - View Single Post

Bob C · 05-22-2024, 07:41 PM

Another way to check the flatness of the block and head is like

Terry Burtz show in the builders guide.
"Place short pieces of oiled Plastigage around various locations on the cylinder block, install the questionable head, and tighten the nuts to 20 lb-ft in increments not exceeding 5 lb-ft as described in “Head Torque” below.
Remove the head and measure the Plastigage. If your head is not within 0.002 inch of being flat, we recommend that it be resurfaced, or you can use a Best 509C head gasket that is more tolerant of flatness."

05-22-2024, 07:41 PM	#12
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 9,358	Re: 1931 model a engine Another way to check the flatness of the block and head is like Terry Burtz show in the builders guide. "Place short pieces of oiled Plastigage around various locations on the cylinder block, install the questionable head, and tighten the nuts to 20 lb-ft in increments not exceeding 5 lb-ft as described in “Head Torque” below. Remove the head and measure the Plastigage. If your head is not within 0.002 inch of being flat, we recommend that it be resurfaced, or you can use a Best 509C head gasket that is more tolerant of flatness."