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Old 05-28-2018, 04:10 PM   #1
prostockpete1
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Default 1972 buick 350 real seal

what manufacturer offers a replacement 2 piece neoprene rear main seal to replace oem Rope for 1972 Buick 350 ?
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Old 05-28-2018, 04:28 PM   #2
Lyn Smith
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Default Re: 1972 buick 350 real seal

TA Buick performance in AZ. has the 4 rear neoprene seals for a Buick 350 in their catalog for $16.95. I have a 72 350 4bl intake manifold if you are looking for one.
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Old 05-29-2018, 07:36 AM   #3
Glenn Briglio
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Default Re: 1972 buick 350 real seal

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Originally Posted by prostockpete1 View Post
what manufacturer offers a replacement 2 piece neoprene rear main seal to replace oem Rope for 1972 Buick 350 ?
Use a ford 460rear main seal.
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Old 05-29-2018, 10:27 AM   #4
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Default Re: 1972 buick 350 real seal

Thanks Glen .. to think that a Ford main cap has same dimensions as the Buick in seal area
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Old 05-29-2018, 11:55 AM   #5
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Default Re: 1972 buick 350 real seal

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Originally Posted by Glenn Briglio View Post
Use a ford 460rear main seal.
That's priceless!! An old-time rebuilder advised me that a rear main seal for a 312 Ford would work in an Oldsmobile 307 and that the rope seal could be avoided altogether. Didn't believe him until I tried it.

c
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Old 05-31-2018, 12:56 PM   #6
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Default Re: 1972 buick 350 real seal

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Originally Posted by Glenn Briglio View Post
Use a ford 460rear main seal.
I thought the 460 Ford worked in 455s, and the 350 took the same seal as the V6. Long ago I worked at Jim Ruggles' when we switched from rope to rubber. I thought the seal we used was from an AMC, but it's been a while.
I see that FelPro sells a neoprene seal for the V6s BS40613. Either way, make sure to polish the knurls down or it can chew the edge off of the neoprene seal (that much I do remember).
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Old 05-31-2018, 01:21 PM   #7
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Default Re: 1972 buick 350 real seal

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Originally Posted by Chuck Norton View Post
That's priceless!! An old-time rebuilder advised me that a rear main seal for a 312 Ford would work in an Oldsmobile 307 and that the rope seal could be avoided altogether. Didn't believe him until I tried it.

c
Interesting, every Ford 312 I ever rebuilt used a rope rear main seal.
They did have a pressed in rubber seal in the front timing cover however.
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Old 06-01-2018, 12:11 PM   #8
Glenn Briglio
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Default Re: 1972 buick 350 real seal

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Originally Posted by Tom Broome View Post
I thought the 460 Ford worked in 455s, and the 350 took the same seal as the V6. Long ago I worked at Jim Ruggles' when we switched from rope to rubber. I thought the seal we used was from an AMC, but it's been a while.
I see that FelPro sells a neoprene seal for the V6s BS40613. Either way, make sure to polish the knurls down or it can chew the edge off of the neoprene seal (that much I do remember).
231 has 2.500 main journal diameter. 460 ford and 350 buick both have 3.000 main journal diameter. Fel pro bs40032 is the one to use.
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