2000 jeep cherokee sport overheating
have literally replaced almost every part of the cooling system. radiator, cap, water pump, fan clutch, hoses, thermostat, and the head gasket along with a new head. It's still overheating. test have been performed including a combustion, pressure, and flow test. all checked good. electric fan is kicking on when supposed to. No smoke from exhaust or moisture. the oil has 2500 miles on it and looks as clean as it did going in. no level changes on oil or antifreeze, except of course when it overflows the overflow container. the onlt thing left I can think of is the block, but nothing is pointing in that direction either. If anyone has some advice besides new motor or salvage I could use it. thanks
Could be a small hole in overflow container. Coolant flows in and doesn't flow out on cooling. Hence, low coolant in block and overheating. If you blow air into overflow hose and don't get bubbles in overflow container most likely is the problem. Happened on my 2000 Cherokee while under warranty so I took it to dealer to get thoroughly checked out even though I knew what problem was. Told them about hole and it still took two visits to get new overflow container.
check and make sure the water pump is the right one. there are left and right ones. look at the original from the jeep and make sure that the star in the back of the pump is exactly like the same on both the old pump and the new one. that happened to me as well. did everything even took the heads off and did all that and it was that the water pump was backwards.
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