The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 98 1500 5.7 vacumn check

crsgmc · 11-18-2018, 04:49 PM

I have a 96, and yes the intake gaskets are known to leak. Had one that was leaking out of the back of the engine and the oil would run down to the pan and on to the floor. I replaced the gasket and it still leaked. I did not see any cracks in the intake manifold, but the gasket surface was pitted quite a bit. I gave up and purchased a new intake manifold and it sealed up perfect. Replacing the gasket is not that hard but the heater hose fittings usually fall apart when you try to remove it. I have not heard of any cracked intake manifolds but that does not mean much. It would be best to get the felpro steel backed gasket, they are supposed to last longer. I used this gasket so time will tell.

11-18-2018, 04:49 PM	#4
crsgmc Registered User Join Date: Apr 2018 Location: Carpenter, Wyoming Posts: 83	Re: 98 1500 5.7 vacumn check - internal leak I have a 96, and yes the intake gaskets are known to leak. Had one that was leaking out of the back of the engine and the oil would run down to the pan and on to the floor. I replaced the gasket and it still leaked. I did not see any cracks in the intake manifold, but the gasket surface was pitted quite a bit. I gave up and purchased a new intake manifold and it sealed up perfect. Replacing the gasket is not that hard but the heater hose fittings usually fall apart when you try to remove it. I have not heard of any cracked intake manifolds but that does not mean much. It would be best to get the felpro steel backed gasket, they are supposed to last longer. I used this gasket so time will tell.