With both valves closed (TDC compression stroke) with the tractor in High gear, and brakes locked. Air pressure (100psi or so) is put in the spark plug hole, and one listens to hear where the air leaks out. Air cleaner, oil fill hole, exhaust, radiator, etc. (yours will be more than likely from the oil fill hole) It won't tell you if it is a cracked piston, hole in piston, or broken ring. It will just confirm the need to pull the head and get a visual of the piston. It has wet sleeves which are easy to remove. JimN
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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