Question about 1998 Jeep Cherokee

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Changed thremostat and it builds up pressure on the upper radiator hose temp also rises water pump is not leaking and heater does not get warm

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  • Jeep Master
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What was the problem before you replaced the thermostat? If you had the same condition and the thermostat you replaced was put back in with the spring end towards, not away from the engine, chances are the radiator is internally obstructed. If you cannot add coolant while its running unless you dribble it in, that's a strong indication that its plugged up. Most over the counter flushes will just go around the obstruction so a replacement or commercially done flush job is in order. If you have rapid pressure build up I'd also be concerned that you may have a head gasket or crack in the head casting.
That can be checked either with a dye test or hydrocarbon test. Exhaust entering the system will first drive the coolant from the heater core since it's at the top of the system, resulting in a loss of heat.
Steam from the tail-pipe or coolant in the engine oil are also symptoms of that.

Posted on Nov 12, 2010

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Waterpump 2002 ford turaus 3.0 durtec


3.0L Engine

VIN S Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
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