Question about 1999 Jeep Cherokee
First problem is the radiator cap. You cannot drive it without one. I don't remember what the pressure rating should be but about 18psi should work. Second, most times all you need to do to bleed the system is to run the engine with the heater on full heat with the radiator cap off till it reaches operating temp.. Sometimes it also helps to raise the front of the vehicle a bit to get any air to move towards the front.
If you have a 4,0 engine, be aware that there is a casting problem with many of those cylinder heads.
(they develop "micro-cracks" inside that can allow compression gasses into the cooling system and cause overheats) there is a machine that can detect hydrocarbons in the radiator and a dye test as well. Also, be sure that your thermostat is opening. Far easier to just replace it than to sit around testing it. They are inexpensive and relatively easy to install.
Posted on Oct 12, 2010
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Posted on Jan 02, 2017
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