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.Google+
Car Problem Reports
Chevrolet Venture Intake Manifold Gaskets May Leak Coolant or Engine Oil
Chevrolet Venture Problem
Engine Affected: 3.4L V6
Average Mileage: 104,612 mi (27,000 mi - 194,000 mi)
Visitor, 2002 Chevrolet Venture, 3.4L V6, 51,000 mi
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.
Visitor, 2002 Chevrolet Venture, 3.4L V6
when changing oil noticed white film in engine from coolant leaking into engine ,used stop leak and now it leaks outside of engine.
Visitor, 2004 Chevrolet Venture, 3.4L V6, 90,000 mi
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.
Visitor, 2002 Chevrolet Venture, 3.4L V6, 120,000 mi
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.
Visitor, 2002 Chevrolet Venture, 3.4L V6, 140,000 mi
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.
Visitor, 2000 Chevrolet Venture, 3.4L V6, 137,000 mi
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!)
Visitor, 1998 Chevrolet Venture, 80,000 mi
leaking coolant/intake manifold gasket
Visitor, 1997 Chevrolet Venture, 128,000 mi
oil and coolant seem to be mixing,coolant is dark green. have to put at least a quart of oil and some times coolant in car now starting to over heat at an idle and sometimes driving. smell coolant. I have been told intake manifold gasket may need to be replaced
Intake manifold gaskets were replaced twice (57000 miles and 100000due to coolant leak.