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01-20-2020, 05:36 PM | #1 |
Junior Member
Join Date: May 2013
Posts: 27
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312 rear main seal
Can the rear main seal be replaced without pulling the engine?
Thanks |
01-20-2020, 06:23 PM | #2 |
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Join Date: May 2012
Location: Middle TN
Posts: 1,060
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Re: 312 rear main seal
Yes, if you can get the pan off. You may need to drop the drag link. Also may need to rotate the crank to get the counterweights up out of the way of the pan unless you're really lucky.
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01-20-2020, 07:58 PM | #3 |
Senior Member
Join Date: Mar 2013
Location: Kent, WA. Tucson, AZ
Posts: 1,398
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Re: 312 rear main seal
I replaced the rear main on my 312 with the engine in place in my roadster. I used the Best Garket black neoprene seal, and followed the instructions by Ted Eaton. One caution, Best made some silicone seals that were orange, and they failed often under 500 miles. That's what I replaced. If you get one (and you shouldn't, they should all be gone) don't use it.
Ted's article http://www.eatonbalancing.com/2008/0...-y-and-others/ |
01-22-2020, 03:04 PM | #4 |
Junior Member
Join Date: May 2013
Posts: 27
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Re: 312 rear main seal
Ok - thanks Guys...will give it a shot. Can’t leak any more than it does now! Thanks
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01-23-2020, 07:44 PM | #5 | |
Member
Join Date: Jan 2013
Location: New Mexico
Posts: 69
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Re: 312 rear main seal
Quote:
If the only leak you have is a rear main, then it would probably be a good idea to replace the rear seal. Good luck Wrong car, the car I was referring to, is a 1956 Ford Fairlane 292 Last edited by harleyjohn45; 01-23-2020 at 07:57 PM. Reason: correction |
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01-26-2020, 05:35 PM | #6 |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
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Re: 312 rear main seal
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01-26-2020, 07:21 PM | #7 |
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Join Date: May 2010
Location: St. Michael, Minnesota
Posts: 1,713
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Re: 312 rear main seal
I have seen more leaks at the holders mount than the actual seal. Make all the parts very clean, use lacquer thinner or acetone and Q Tips. The threads on the two bolts too. Use sealer very sparingly, but very accurately.
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01-26-2020, 08:07 PM | #8 |
Senior Member
Join Date: Mar 2013
Location: Kent, WA. Tucson, AZ
Posts: 1,398
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Re: 312 rear main seal
First I saw this tool I was 16. I'm 70, so it's been around for a while. Don's right about the seal retainer.
Look at Ted's site about offsetting the seal. I linked it above. https://www.amazon.com/Lisle-27000-S.../dp/B0002SRCJW |
01-26-2020, 08:48 PM | #9 |
Senior Member
Join Date: May 2010
Location: Rathdrum Idaho
Posts: 737
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Re: 312 rear main seal
[QUOTE=Ole Don;1845606]I have seen more leaks at the holders mount than the actual seal. Make all the parts very clean, use lacquer thinner or acetone and Q Tips. The threads on the two bolts too. Use sealer very sparingly, but very accurately.[/QUOTE
On a 312 don't rule out a cracked block either. |
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