big block oil filter adapter

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Mar 29, 2021 | 07:28 PM

tkucala

Thread Starter

Racer

Joined: Apr 2018

Posts: 295

Likes: 46

big block oil filter adapter

Hello:
I was priming my 427 today and had a oil leak coming around my filter. The adapter I have now has a hole in it. I am having trouble finding the correct adapter to replace it. I attached some pictures to show what I have now. I found a Mr.Gasket set that looks like it may work but not to sure if it is correct. It does have 5/16 threads on the bolts and they do have Dorman markings. Any help will be greatly appreciated!
Tom

Mar 29, 2021 | 07:45 PM

Jeffs82c3

Safety Car

Joined: Oct 2015

Posts: 4,782

Likes: 223

From: Lebanon Pa

I bought this for my 540 from summit racing. Looks different but once the filter is attached, nobody will know.lol

Mar 29, 2021 | 08:16 PM

tkucala

Thread Starter

Racer

Joined: Apr 2018

Posts: 295

Likes: 46

I assume then when I remove the factory bypass valve and gasket I end up with the smooth sealing surface for the oil filter gasket. Correct?

Mar 29, 2021 | 08:32 PM

Jeffs82c3

Safety Car

Joined: Oct 2015

Posts: 4,782

Likes: 223

From: Lebanon Pa

Oil filter gaskets will seal on the block, not on the adapter

Mar 29, 2021 | 08:58 PM

tkucala

Thread Starter

Racer

Joined: Apr 2018

Posts: 295

Likes: 46

Got it thanks for the reply!

Mar 29, 2021 | 10:31 PM

TimAT

Le Mans Master

Joined: Oct 2006

Posts: 7,123

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From: Gladstone MO

C3 of Year Finalist (appearance mods) 2019

That oil filter adapter in your picture looks like the one for the old style "toilet paper roll in the can" or canister filter. Since 1967 or so GM has used spin on filters (PF-25 and the like). Jeff82c3 has the correct style adapter.