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Pontiac Repair/engine leaking oil


QUESTION: 2000 pontiac montana engine will start and run, but oil coming out of engine can not go far before low oil pressure light comes on. what could this be? I am not a mechanic but i suspect the oil pump quit working.

ANSWER: Hi there:

When the oil light comes on is there any noise comming from the engine? Youcould get off real easy and it just be a bad oil pressure switch. Pull the dipstick and see if the oil is low and if the oil have a milky look to it. if it is then you have a head hasket issue or an intake mainifold gasket that was leaking coolant into the engine and you didn't know it. If that is the case couples with the oil lamp on is a recipe for disaster and engine failure. oil and coolant do not mix and will put an end to an engine in a hurry. good luck and happy holidays.

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

QUESTION: oil is not milky , but oil is leaking out around bottom of engine. when oil light comes at first it is not making a noise but after about 10 minutes it makes a ticking noise that is because of the oil leaking out of engine. that why i thought the oil pump might have quit working.

No the pump didn't quit working. I think the engine is worn out. More then likely the bearings are worn out and the pump can only deliver so much oil pressure and as the oil warms up the viscosity things out so the pressure drops due to leakage past the increased internal clearances in the engine due to worn out bearings.

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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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