Van overheating Have recently replaced water pump and thermostat in my Montana. Radiator is roughly a year old. There seemes to be no circulation of coolant as pressure seems to push all of it into reservoir. Can drive down the road and will do fine and then it will suddenly red line and hot coolant light comes on. Thought rad cap was bad and tried another but to no avail. Does this mean there is a blockage somewhere??

Jeffrey Turcotte

• 8991 Answers
• Posted on Sep 09, 2010

SOURCE: temperature gauge went up. put coolant in

Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat and let me know if you have questions

DillyWackSac

• 195 Answers
• Posted on Sep 15, 2010

SOURCE: 2002 pontiac montana overheats but

Either you have not bled the system, or possible fan not working, or head gasket problem. Solution

Step by Step
1. Check both hoses, do both have equal amount of pressure?
2. Run the vehicle where your gauge shows in the middle, shut the vehicle off then open the bleed valve near the heater line and wait till fluid comes out like a steady stream. Make sure you do not go low on coolant.
3. Turn on vehicle, turn on A/C high maximum blow check to make sure both fans are on. We are testing to make sure the fans at least work!.
4. After all this and you are still boiling over make sure your radiator cap is good if not then replace. Last but not least get a block tester to test for exhaust gases in the coolant. Rent one from autozone. $25.00 plus fluid which is about $8.00.

SOURCE: engine over heating.. just added a gallon of

you can leave the cap off the same way to check to is if it is circulateing,is your water pump leaking? if your loseing coolent.

SOURCE: i changed water pump and thermostat the car get

It sounds like a blown head gasket to me.

SOURCE: Why does it keep overheating 2003 Pontiac Grand AM V6

Head Gasket still--- not done correctly