EKXJ87
February 15th, 2016, 02:14 PM
Last year the 92 4.0 developed a small oil leak around the oil filter so thought, after replacing the adaptor o-rings still leaking. Come to find out the oil was coming out the top of the dip stick, check all possible culprits clogged valve cover baffles, vent tube etc. Instead of messing with it I decided to just get another used 4.0 to freshen up so I searched and found a complete 4.0 w/135K with transmission & tcase on CL in Cortez for a good price so I headed up.
After several months of sitting I decided to try a compression check and all looked ok around 130# except #4 cylinder which was leaking out the valves. After pulling the head an filling the valleys with alcohol sure enough #4 was leaking so off to get the head re-worked. All the piston were perfect and the cylinder walls still had the cross hatched so I just cleaned everything up and hope to have it ready for the Anniversary Run !!
Compression number are all 150#+ and that's cold!, Also if anyone is looking to test a 4.0 out of the jeep I had to sacrifice the transmission for the bell housing to mount the starter and now I can jump start the motor to test.
After several months of sitting I decided to try a compression check and all looked ok around 130# except #4 cylinder which was leaking out the valves. After pulling the head an filling the valleys with alcohol sure enough #4 was leaking so off to get the head re-worked. All the piston were perfect and the cylinder walls still had the cross hatched so I just cleaned everything up and hope to have it ready for the Anniversary Run !!
Compression number are all 150#+ and that's cold!, Also if anyone is looking to test a 4.0 out of the jeep I had to sacrifice the transmission for the bell housing to mount the starter and now I can jump start the motor to test.