Question about 2001 Jeep Grand Cherokee
Get a compression test. (same with all engines, with bad head gasket, you may see 2 cylinders real low. and classic reason.
the leak down on rad works too.
as does the blue/green dye test on same.
there are 3 tests,
Posted on Dec 07, 2014
Sounds like you have a gasket bad...Have a radiator pressure test done it will pick up a leaking intake,heads or radiator good luck
Posted on Dec 06, 2014
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Posted on Jan 02, 2017
Have a shop pressure test the cooling system, this will make the leak easier to locate, if I have to guess I would go with a leaking water pump.
Posted on Dec 26, 2008
SOURCE: My 2001 Jeep Grand Cherokee's
You may have a stuck closed thermostat or the impeller has failed on the water pump.
Replace them both. You never trust a stat that has gotten hot, and there is no sure fire way to test. You can take it out, put the car back together and see if the engine still gets hot to determine if it's the stat, or the water pump, but once you do all that, you might as well just replace them both.
You also need to make sure the radiator is not all slugged as well, and make sure the radiator cooling fans are both working.
There is a cooling fan relay that is prone to failure as well. Mine did in my '03 Jeep Cherokee. It's located behind the right headlight, and requires that you remove the headlight, drill a hole in the plastic shield, and replacing the relay. You can get a new one at the auto parts store. For more detailed instructions, go to www.wjjeeps.com
Posted on Jan 29, 2009
SOURCE: OIL IN ANTIFREEZE
Everyone automatically assumes that oil and water mixing means a blown head gasket or cracked engine block. Of course common sense is usually not that common. Oil in coolant is a different problem than coolant in oil. The former is a low pressure leak, and could indicate only an intake manifold gasket. It could also be an early or small head gasket leak. Coolant in oil is usually a cracked block or torn head gasket, and has concomitant symptoms of white exhaust smoke and milky oil on dipstick. If you replace the head gasket and the problem persists, an intake gasket could have fixed the problem.
Posted on Jun 24, 2009
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