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2002 Pontiac Aztek- Overheating, coolant leaking and mixing with oil (oil not in coolant)?
We have a 2002 Aztek that has been nothing but problematic. About 3 months ago, I was driving it and the temperature gauge just shot up. I immediately pulled over, and had it towed to the shop. Shop says blown head gasket. Had it replaced, and it was ok for about 1.5 months. I was driving it again, and the same thing happened. Took it to the shop. Shop says I need a new oil cooler.
About a week after we get it back with the new oil cooler (this was 2 days ago), it starts overheating again. I quickly get it home and put it up on the ramps. I noticed that it was leaking out onto the ground. I checked under the water pump, and it didn't appear to be coming out of the weep hole. There is a hose above the oil filter (I believe this goes to the oil cooler) that had bulged out, and was spraying coolant everywhere.
Out of curiosity, I decided to drain the oil out of the car. To my surprise, it looked like it was 50% oil, and 50% coolant! Had the consistency of water, and was translucent. I then looked in the coolant reservoir, and there was no trace of oil. So there's oil in the coolant, but not the other way around.
Is it safe to assume that the mechanic did a shoddy job of installing the oil cooler, and that the bulged hose was just a coincidence? Is there any way that coolant could get into the crankcase if it was ONLY the water pump?
I appreciate the help. I just want to get this narrowed down before I take it back to the shop. I don't want it to be a coincidence, and have to be charged for something new.
6 Answers
- Impalaman62Lv 41 decade agoFavorite Answer
Either on the oil cooler or head gasket are the only two places where the oil can come into the crankcase. Some Azteks are known for this problem. The technician is a possibility. Finding a second opinion by someone that can look at the vehicle itself would be my first move.
- 7 years ago
my aztek keeps overheating but only does it once every 2 weeks, we have changed the head gasket when it blew out of it and changed the termostat at the same time. then it was fine for awhile but now it has overheated again and we changed the thermostat again thinking it was the problem. well today I was only 10 miles away from my house and it lit up saying Hot Temp and was pegged all the way to HOT when I pulled over to check it there was coolant coming out of the overflow. Can anyone give me advice to what could be wrong with this car?
- Anonymous1 decade ago
either the head gasket is blown, or the head is cracked. unless the hose was changed with the cooler it could have already been weak and/or blown from the high temperature/head crack creating high pressures in the cooling system. it would seem if the cooler was the problem oil would also be in the coolant/
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- Anonymous1 decade ago
I think you need an intake manifold gasket.
Source(s): Years in auto service.
