So I still have my 88 F-250 with 7.3 IDI non-turbo on the road. It runs great. One possible problem that is hard to detect is damage from cylinder cavitation caused by failure to maintain the cooling system properly. Not the fault of the owners, Ford sent out warnings to people in the late 90's because they were seeing more and more cylinder cavitation issues. Get some diesel coolant test strips from your tractor dealer and at least check the antifreeze to see if it may have been maintained properly.
Cavitation will cause cylinder damage that pretty much trashes the block. Also, the 7.3 block is a bored out 6.9 block, so the walls are thinner, you can't just bore it and pop new pistons in it, you need to install liners, but this engine does not have liners....
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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