Problem Description and Possible Solution
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.
Average mileage: 111,693 (27,000–260,000)
Engine affected: 3.4L V6
82 people reported this problem
I have had two Chevy Ventures that developed this issue - noticed a coolant leak. The first one, 1999 Venture was still under warranty at 18,500 miles and the dealership fixed it by replacing the intake manifold gasket. My 2002 Chevy Venture developed a coolant leak at 45,000 miles and it cost me about $800 to have it fixed. Found out there was a class action lawsuit against GM's Dexcool coolant causing certain parts, such as the intake manifold to fail - was able to recoup about $650 with a bit of patience and sending in some documentation.
I bought the veh at this mileage. Had the radiator flushed. Six months later flushed it again. Now it is almost getting to the overheating point after driving a while. Overheats more when sitting still and will sometimes cool down when driving a long stretch.
Have smelled coolant for years and recently found coolant reserve empty a couple times. Chevy Venture overheated to the point red light came on during a 3mile drive and drove for 3minutes like this to get home - this happened 2x then coolant was pouring out around upper engine area when I tested it while full of coolant. I took to a close by Chevy dealer (with not enough time to overheat) and they said they will change the coolant intake gasket for $1250 and No warranty because the head may be warped and they wont know until they do all the work and check for leakage. So.. a gamble. Risk 3 payments for a new car or take chances with repairing a payment free car-
My 2002 chevy venture was leaking antifreeze and or water?? Ran hot put in a stop leak now oil is leaking and a milky substance is on my oil cap and water cap.
coolant light comes on. blows hot air,stalls,and leaking anti freeze.replace waterpump,thermostat con"t to have the same problems.
when changing oil noticed white film in engine from coolant leaking into engine ,used stop leak and now it leaks outside of engine.
Intake manifold gasket needed to be replaced. I was leaking coolant and not quite, but almost overheating. I had a friend do the repairs on the cheap but it was still fairly expensive.
Temp. gage started acting erratic(would move back and forth between normal and hot), followed by anti-freeze smell and loss of heater efficiency. This was due to lower intake gasket failure. Had lower intake gasket replaced, along with heads milled (warped due to overheating)at a total cost of 1600 dollars (off-duty mechanic price!! Shop est. close to 2000!)
My intake manifold gasket leaks oil
Took my car to a dealership yesterday,because my heater core t needed to be replaced. Now i have to stop every blook, because my car is over heating worse then what it was when i took it to the shop. And now im losing more cooling then the navy seals swim in.
Had just bought van and could smell oil burning the dealer tried to tell me it was due to a recent oil change but I didn't believe him then the vechicle was running in the red zone I brought it right back demended a rental and that they fix it and sure enough it was a very expensive Gasket/Engine issue that thankfully I didn't have to dish out the thousands of dollars for....
leaking coolant/intake manifold gasket
Mechanic noted at approximately 78,000 miles, small coolant leak at intake manifold gasket. $1200 estimate for repair . Indicated not a major concern if monitoring coolant level more frequently at this juncture .We're starting to look for another vehicle without this problem.
An amateur mechanic friend noticed lots of crud in my coolant system, and thought I should have my radiator flushed. When I took it in to the shop they found out that oil was leaking into my coolant system through the intake manifold gaskets. Haven't had it fixed yet (was checking out the problem online first); they estimate $870.
Exactly as stated. Coolant had oil mixed in and leaking.
2000 Chevy Malibu.Engine over heating, stalling ,hesitation starting.No codes, very light misfires added coolant and pressure tested coolant system no leaks.checked oil,oil light brown and milky as result of coolant contamination.Tail pipe show no signs of white smoke and vehicle has adequate power. Replaced lower intake manifold gaskets that show failure at coolant passages.
had small coolant leak for years, this morning it overheated. radiator was empty altho reservoir was full. Filled up radiator, started but running a little rough. water vapor/drip from tailpipe. suspect intake manifold gasket.
Also had heater core leak. Gasket leak led to cracked head gasket.
Started over heating there oil in the over flow but still run like a brand new van