Car Problem Reports

Pontiac Aztek Intake Manifold Gaskets May Leak Coolant or Engine Oil

Pontiac Aztek Problem
30 Reports
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Model Years Affected: 2001, 2002, 2003, 2004, 2005

Engine Affected: 3.4L V6

Average Mileage: 136,355 mi (92,000 mi - 220,000 mi)


The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Our technicians tell us that operating the engine  with a coolant/oil mix can result in internal engine damage. Replacing the intake manifold gasket should correct these leaks.

  • , , 3.4L V6, 94,800 mi

    Car keeps overheating after driving only 1 mile or so. It doesn't always overheat but I never know when it is going to. I pull over and shut the car off for a few minutes and then start it back up and it is fine. My brother has changed the thermostat but that didn't solve the problem. I have also been experiencing leaks in the roof and also the dashboard. I bought the car brand new in Dec 2000 with only 4 miles on it. I love the car and it is perfect for all of my outdoor activities but lately it is giving me such a headache...

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  • , , 3.4L V6, 130,000 mi

    Car mysteriously started losing coolant. Checked the oil to find it had coolant mixed with it to form chocolate milk. Looks like car is end of life, time to shop for a new one.

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  • , , 3.4L V6, 163,000 mi

    I was told that I will need to have intake manifold replaced. Coolant is mixing with oil. check engine light on. Will repair when I have the extra cash. Just did alternator. Trying to hang in without sinking in more money before I purchase a new car ...

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  • , , 3.4L V6, 98,000 mi

    I began smelling antifreeze after every drive, particularly in hot weather. This occurred about six months after I installed a new water pump. I worked as an "A" mechanic for Sears and several other shops years ago so this is not an impossible problem. About four hours of work, several expletives and a skinned knuckle. Great time to replace those rear spark plugs too. In spite of this vehicle having a host of quality issues (all four axle bearings, rear end taking a dump, leaking gas tank and lousy response from the dealer and the list goes on), I really like the car and enjoy driving it. I have two other four other cars and have never had anywhere near the troubles this one has given me but the engine is top shelf in spite of the gaskets. Some may recall that the early Ford Taurus had a design flaw that caused a head gasket leak around 80,000 miles. Had one of those too but once you replaced the gaskets (11 hours and MANY expletives) I had another 120,000 miles of trouble free driving for about $300.

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  • , , 3.4L V6, 156,000 mi

    replace thermostat because it was running hot, replaced climate temp sensor for the relay fans, replace bleeder screws, replaced radiator cap, still can get all air out from cooling system. dont know what else to try but compression test

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  • , , 3.4L V6, 120,000 mi

    now it overheated and the lifters are rattling.

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  • , , 3.4L V6, 147,000 mi

    I am leaking a mixture of oil and coolant. Changed the water pump and thermostat and still having the same problem.

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  • , , 3.4L V6, 120,000 mi

    Overheated in 30 seconds and engine clunking noise. Pulled over and parked antifreeze in the oil.

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  • , , 3.4L V6, 130,675 mi

    No heat, took to Sears, was told it was my intake manifold gasket and that I need a new engine. Have not resolved the problem a of yet.

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  • , , 3.4L V6, 220,000 mi

    coolant leak

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