The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1968 GMC 250 In-line 6 Rear Mail Seal

RustyPile · 09-25-2022, 07:06 PM

Did you polish the area of the crankshaft where the seal runs?? Did you clean the recess where the seal fits. Did you put a small amount of sealant on the area of the block between the gasket and seal?? This prevents oil from seeping between the block and main cap.. And lastly --- are you sure it's the seal that's leaking???

09-25-2022, 07:06 PM	#2
RustyPile Registered User Join Date: Dec 2017 Location: Elkhart, Texas Posts: 1,884	Re: 1968 GMC 250 In-line 6 Rear Mail Seal Did you polish the area of the crankshaft where the seal runs?? Did you clean the recess where the seal fits. Did you put a small amount of sealant on the area of the block between the gasket and seal?? This prevents oil from seeping between the block and main cap.. And lastly --- are you sure it's the seal that's leaking???