1999 Jeep Cherokee XJ Coolant System Pressure Test

[@diekatzefliegt]

thanks for the video. Will this help reveal a head crack? My 4.0 WJ (2004) has eaten a fair amount of coolant and i dont see any leaks underneath

[@toddg4228]

It will certainly help tell if there is an internal leak. Those engines are cast iron, however the heads are not. You can sometimes see the crack through the oil fill hole on the 0331 heads. A machine shop will certainly find a crack, though. The 04’s were not susceptible to cracking, but run it hot enough snd long enough….the head gasket is usually the first to blow.

[@diekatzefliegt]

@@toddg4228 thanks for the quick reply. This jeep has never been overheated, so this is probably ruled out? Still I guess it would be a good idea to see if I can find a leak.

[@toddg4228]

@@diekatzefliegt use this test in conjunction with the combustion leak test.

[@diekatzefliegt]

@@toddg4228 will do. Thanks!!

[@k9under]

Them XJ just run a little hot anyway i have two.

[@toddg4228]

They shouldn’t, under normal circumstances and stock configuration.