Question about 1999 Jeep Cherokee

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Thermostat stays steady at 210, then suddenly jumps into red zone and check gages light comes on. What gives??

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You may have a head gasket that is starting to leak intermittently. Next time it happens, check to see if bubbles are coming into the coolant reservoir. This is the way to tell if it's a head gasket.

If it isn't the head gasket, it might be an air pocket. Make sure the system is full and open any bleed ports to make sure there are no air bubbles.

Posted on Oct 01, 2010

Testimonial: "Tested and found bubbles. Looked like a pot boiling on the stove. Thank you for the help"

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