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2003 Pontiac Montana w/1SA Pkg 4dr Reg WB

2003 Pontiac Montana
Trim Info:
Front Wheel Drive, 4 Door Reg WB, 2WD Minivan
19 mpg city / 26 mpg hwy
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July 15, 2010, 8:37 am

AutomotiveForums M
 

Question: My Montana is over heating!!

When im going down the road the temp is fine but when I stop at a red light the temp will start to go up! I can not let it run no more then 5mins max before its on the red! My husband has changed the thermostat 2 times now and flushed it 3 times. we put 50/50 DEX-COOL in it and kept letting the air out. next thing we were going to do is put a new Radiator in it, we also replaced the water pump last year.


July 16, 2010, 9:26 pm

Elizabeth K
Expert Mechanic

Is your radiator fan coming on? Instead of replacing parts, try testing them first. Here's an article that goes through troubleshooting an overheating problem. Let me know if you have any questions after reading it:
http://www.2carpros.com/first_things/engine_over_heats.htm


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