Intake Manifold Gasket May Leak Coolant or Engine Oil on Chevrolet Tahoe

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.

Problem Data
RepairPal Verified
Average mileage: 154,012 (20,040–276,000)
Engines affected: 5.3L V8, 5.7L V8, Gasoline
9 model years affected: 1995, 1996, 1997, 1998, more1999, 2000, 2001, 2004, 2005
44 people reported this problem
Viewing 1 - 13 of 13 comments
Coolant is low and leaking out the tailpipe (White smoke ) Oil is OK. Repair is being contemplated.
This is the forth time in the last ten years!
leaking exhaust manifold gasket. Motor sounds like a diesel with a sound like value chatter until it warms up at which time sound goes away.
our leak wasnt oil or coolant but air. The intake gasket was leaking to the outside when the truck was cold thus messing with its idle in cold say sub 45 degree weather. as soon as the motor warmed up and everything expanded it would seal and no leak=good driving. since we paid to have it replaced, no problems with it since.
3 seperate occasions i start it up, drive it an hour to work. Shut it off and when i start it back up its blowing white smoke It might smoke all the rest of the day then i drive it home, park it and the next few days it will be fine. Pretty sure its antifreeze steaming out the exhaust. It dissipates fast and smells sweet. Been having to add a gallon or so of antifreeze about every 3 weeks or so. Just changed my oil and theres no signs of water in it. Im thinking intake gasket but my mechanic doesnt want to change it until he can see the smoke for himself and of course it wont do it while hes driving it.
Miss fire when it shut off when I got home crank it up and it would not start after trying to crank it it finally started. .I than gave it some gas..a few time to maybe clear it up and it than started blowing steam out the tail pipe. .I than shut it off check the oil and it had antfrize in the starts and runs fine but not sure what happen..
My gaskets leak on my intake and I've noticed a change in the way the

engine sounds, it's only has 95,000. Miles on it and it already sounds like it's knocking so I'm getting Chevy to look at it Friday
Loss of heat in winter. Found antifreeze in oil. Trying to find estimate on replacement of intake gaskets.