Why does the coolant in the overflow jug bubble on a 2003 Jeep Grand Cherokee Laredo even when the motor is not hot just changed the radiator.

Asked by May 24, 2015 at 02:28 AM about the 2003 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

1 Answer

78,565

Could either be air in the cooling system or first stage of a blown head gasket, check for coolant in the oil or oil in the coolant, if those are clear and you don't see any white smoke out of the tailpipe then have a block checked performed just to make sure.

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