Check and test the thermostat and check if the heater core is clogged-start here
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Thursday, December 30th, 2010 AT 11:56 PM
DAVE'S BIG BACKYARD!
MECHANIC
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And make sure it has coolant, if getting warm on gage themostat should be ok, if heater core is pluged one of the hoses that go to it will be alot cooler.