i have a jeep cherokee sport 2000. just replaced the water pump and thermostat.. but the jeep still overheats and the ehgine throws a lot og pressure. before i changed the water pump the engine smoked
i was traveling and the temp. went high. stopped and the engine was so hot it
was throwing smoke from the top....
the mechanic I took the jeep to found out that the water pump they sold me was backwards. there's like a star in the back of the water pump. The part that goes into the motor. well, that star I didnt know that there was left and right. the water pump fit right but it was a model for a grand cherokee not a sport,. so instead if pumping water into the motor the water pump wouldnt allow the water to go in. also,we romoved the thermostat for a more flouent flow of water. jeep is running great now.
You might have a cracked cylinder head or Head gasket do a pressure teston the engine and if it's losing radiator pressure you will know and make sure your oil dipstick doesn't have white cream on it that means the coolant is going into your crankcase past the head gasket.
I'm a master machine builder and I have been trouble shooting race engines all my life
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