1963 gas Ford 4000

John1010c

Member
My dad's Ford 4000 just recently quit running . One weekend it ran fine and three weeks later it wouldn't start. It has spark the oil looks good and is at the proper level and the coolant is at the correct level . I told him to check the compression. He only had one cylinder that had about 80 psi the other three had non or very little. The pistons are moving up and down and he says the valves are moving.

Could it have jumped trimming ? If so are the valves opening on the compression stroke ? Going to start breaking it down soon so any tips would be appreciated.
 
My guess would be you thought it ran fine before but a valve was leaking severely reducing that cylinders compression.
Then the head gasket blew between two cylinders. Now
You have 3 cylinders with no compression. Tractors with few exceptions have timing gears not chains, gears rarely strip and reset. Usually they strip and the teeth shear off one section a the cam stops turning, which leads to no compression in all cylinders.
 

Before tearing it apart do a ''cylinder leak down test'' to find out what is actually going on.

Perhaps you have an autoparts store nearby that rents tools?
 

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