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**chevmn** · 03-26-2024, 11:23 PM

Had a delay so no progress in last few days, but pushing on the metal portion of the seal, and tapping with a small punch has been fruitless so far, so next step is loosening all the main caps. I believe the issue is the fact this seal has been in there since late 1971, and then it had sat in a field since somewhere around 1983. I have obviously had it running as of the last year while I work on the truck, but started noticing the rear main leaking, so I decided to replace. Most of the gaskets, and other seals had already been replaced, along with timing set. Engine has roughly 63,000 miles. Pretty sure loosening the rest of the main caps, and maybe a little downward pressure on the crank should allow it to break free. No plans to rebuild as I do not see any need.

03-26-2024, 11:23 PM	#8
chevmn Senior Member Join Date: Dec 2017 Location: Central MO Posts: 870	Re: Rear Main Seal Had a delay so no progress in last few days, but pushing on the metal portion of the seal, and tapping with a small punch has been fruitless so far, so next step is loosening all the main caps. I believe the issue is the fact this seal has been in there since late 1971, and then it had sat in a field since somewhere around 1983. I have obviously had it running as of the last year while I work on the truck, but started noticing the rear main leaking, so I decided to replace. Most of the gaskets, and other seals had already been replaced, along with timing set. Engine has roughly 63,000 miles. Pretty sure loosening the rest of the main caps, and maybe a little downward pressure on the crank should allow it to break free. No plans to rebuild as I do not see any need.