Question about 1999 Jeep Cherokee 4WD

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1996 Jeep cherokee, leaking coolant when cold/ hot ok.

The lower radiator hose by the water pump side is leaking coolant
The back corner of the engine driver side leaking coolant.
When cold. As engine get to operating temp for 15=20 minutes leaks stop when running, The leaks are when engine is shut off and system is loosing pressure, The engine is 4.0 liter straight 6 cylinder.
Engine is not missing/ runs good,

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  • Anonymous Mar 18, 2014

    I has a 2001 Chrysler LHS 3.5 liter. I am getting oil pushed in to my radiator but the is NO coolant getting in to the oil.
    It runs great, no stall no stutter, good compression on all cylinders

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Waterpump houseing/shaft seal is on the way out hence the water/coolant, running along the block. when hot the seal does so, when cold and depressurising seal doesnt.

Posted on Jan 25, 2009

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The engine coolant does not "circulate" through the reservoir in your Jeep. This system works on the fact that things expand when they are hot and contract when they are cold. When the radiator is full, the coolant expands when the engine gets hot and the overflow runs down the small hose to the reservoir. When you shut the engine off, the coolant contracts and a vacuum is created inside the radiator causing fluid to be drawn out of the reservoir and into the radiator. When you start your engine and it gets hot, the cycle begins again.

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