why coolant sysem is under extreme pressure and leaks after thermostat replacement

Asked by Sep 07, 2015 at 10:41 PM about the 1999 Dodge Durango 4 Dr SLT 4WD SUV

Question type: General

replaced water pump and thermostat on Durango. Now it leaks coolant from everywhere especially the thermostat housing, truck sputters. and stops. A lot of pressure in lower coolant hose and none in the upper coolant hose

2 Answers

109,405

I think you need to start at the beginning again in the repair. 1 )Empty all the antifreeze from the car. Remove the thermostat and make sure it was installed in the correct position. I would just purchase a new at this point. 3) flush the entire system with a good system flush two times. Install all the parts and refill the system, MAKE SURTE YOU BLEED THE AIR OUT.

180

Check your spark plugs. A very clean plug or one covered with a white residue indicates a blown head gasket. A blown gasket will push compression into your cooling system and blow out your coolant.

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