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Old 10-06-2009, 05:58 PM
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88 wagoneer xj.. 180k, new radiator, newish water pump..

originally got it, ran warm, replaced rad, ran fine, started running warm again.

rev engine, cools down rapidly. when i idle or am driving sometimes will start to creep, again, rev engine it cools...

any thoughts?
Old 10-06-2009, 06:18 PM
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Year: 1990
Model: Cherokee
Engine: 4.0
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Does it have a sealed coolant system (no radiator cap, coolant is fillled from the resevoir)? if so, you may not have enough coolant in the system. I had the same problem with mine, it would only take a gallon of coolant to start with but i would pinch off the return hose and close the cap. After about 10 minutes of running i could take the cap off and the level would drop. I continued this process until i got about 3.5 gallons in the system
Old 10-06-2009, 06:59 PM
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Year: 1989
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Engine: 4.0L I6
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when was the last time you replaced the thermostat?
Old 10-07-2009, 06:08 PM
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when i replaced the radiator... 2-3k/ 1-2 months ago
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