The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1pc rear main small block oil pan gaskets

Tom · 12-02-2022, 06:13 PM

I put two new fel pro oil pan gaskets on my 98 in the truck. Both leaked. Got fed up, pulled entire engine to re-seal everything with full felpro kit. Followed the directions PERFECTLY [which happen to match the oem GM manual] with the engine upside down on the engine stand for ease and perfection. Also have new rear main seal, new timing cover....
Anyways finished up, let sit overnight. Next day I put everything together besides the intake, and prelube the motor. Let sit overnight again.

Came out to oil leaking on the floor. Its going past the gasket at the timing cover, literally in the middle of what you'd call the front main seal I guess[the arched part where cover meets the pan]. This is beyond frustrating, to the point I ordered a new oil pan and a mahle gasket this time because I can't for the life of me figure out what else could be causing this? Any pointers or things not normally mentioned in instructions?

12-02-2022, 06:13 PM	#1
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,692	1pc rear main small block oil pan gaskets I put two new fel pro oil pan gaskets on my 98 in the truck. Both leaked. Got fed up, pulled entire engine to re-seal everything with full felpro kit. Followed the directions PERFECTLY [which happen to match the oem GM manual] with the engine upside down on the engine stand for ease and perfection. Also have new rear main seal, new timing cover.... Anyways finished up, let sit overnight. Next day I put everything together besides the intake, and prelube the motor. Let sit overnight again. Came out to oil leaking on the floor. Its going past the gasket at the timing cover, literally in the middle of what you'd call the front main seal I guess[the arched part where cover meets the pan]. This is beyond frustrating, to the point I ordered a new oil pan and a mahle gasket this time because I can't for the life of me figure out what else could be causing this? Any pointers or things not normally mentioned in instructions? __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.