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Pontiac Repair/1998 Pontiac transport

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Question
QUESTION: Hi Todd, I recently took my transport to a local repair shop because the temp gauge was spiking it was sputtering and the check engine light was flashing. They changed the intake gasket, ran a flush yet the problem continues. I today changed the thermostat but still the same thing...Could this be a blown or cracked head? I let it run and turn on the heater which it took a long time to heat up and the temp gauge is up and down. The pressure test the replace the radiator cap.

ANSWER: Hi victor.

Those are classic signs of a blown head gasket. if you keep driving it and this keeps happening there is a good chance if could crack a cylinder head a warp a head. Usually the chain of events on these is an intake gasket leask like you had and the fact that it's low on coolant makes it run hot and then the head gasket go bad from the heat. good luck :-)


---------- FOLLOW-UP ----------

QUESTION: Thanks Todd...though it was not quite what I wanted to see lol, would I hear any knocking or see smoke or anything like that?

Answer
No always will you see smoke. It depends on where the coolan it leaking into the cylinder or into the crank case. pull the engine oil dip stick if the oil has a milky look to it DO not drive it anymore. intermix of coolant and oil will damage the engine bearings and cause a knock eventually. it doesn't take much coolant in the oilto cuase damage to occure.  

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Todd Puccio

Expertise

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

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

Organizations
ASE

Education/Credentials
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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