Oil pan / pump clearance issues
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Le Mans Master
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Oil pan / pump clearance issues
Has anyone experienced any problem with clearance issues when using a Melling M-77 stock replacement oil pump / stock pickup screen and a big block factory high performance oil pan? Specifically, the baffling in the pan won't allow the pan to fit over the pump. Hate to modify the baffling in a perfect oil pan.
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Le Mans Master
Joined: Oct 2007
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From: Richmond Kentucky
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Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 6,005
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From: Richmond Kentucky
2025 Corvette of the Year Winner- Modified
2024 C2 of the Year Winner - Modified
2022 Corvette of the Year Finalist -- Modified
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Just now bolted on my NOS L-88 pump (GM part #3964259) and the stock 427 - 435 pan clears perfectly. Not sure what is different about the Melling M-77 pump, but it won't work with the stock pan. Now I have to find a pump that will work with the pan................I'm saving the NOS L-88 pump for a "special" project.
Team Owner
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From: Crossville TN
Is the NOS "L-88" pump any different than the 'usual and customary' GM V8 pump? Is it higher flow or higher pressure than the stock unit? If only higher pressure, install a different regulator spring in a stock pump.
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Le Mans Master
Joined: Oct 2007
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Likes: 1,742
From: Richmond Kentucky
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Same post in C2 section got a response from babbah that he had to mill out some of the baffling in the pan.
Last edited by Dr L-88; Sep 6, 2012 at 03:19 AM.
