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Pontiac Repair/Pontiac montana overheat


2003 pontiac montana, 3.4, water pump failed. replaced, bled system. it was fine for 2 days the over heated again. put it up on ramps, bled it with spill proof funnel. took 4 hrs. was fine 5 days the overheat again. is it possible for there to be debris in the system?

Hi troy:

how long did it run low on coolant when the water pump failed? chances are this blew a head gasket. what happens with these if either the water pump fails and leaks or the intake manifold gaskets fail and leak and it runs low on coolant and when they over heat due to low on coolant they blow out a head gasket. and exactly what you have described is what happens bleed it out and after a few days it runs low on coolant again and it over heats again. repeat over heats makes the problem even worse. good luck :-)  

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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