rear main seal info

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
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tamnalan
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Re: rear main seal info

Post by tamnalan » Sat Jul 06, 2013 11:11 am

I made it for an MVPA convoy last summer - the thread is in the towed accessories photo gallery forum.
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Re: rear main seal info

Post by Fortyeight2A » Wed Jul 10, 2013 2:44 pm

I'll go look for it there. Thanks!

Added 13 July 2013: Found the thread. Nice trailer! Looks like a fun trip, too.
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Re: rear main seal info

Post by Chuckman84 » Wed Oct 09, 2013 8:39 am

the TM says to leave 0.25" of an inch stickout in the cap per edge to allow for crush with the crankcase side, which is trimmed flush. But the guys on the Holden V8 video dont leave nearly that much...???? :?:
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Re: rear main seal info

Post by artificer » Wed Oct 09, 2013 9:11 am

The V8 one does things the right way ensuring the rope type seal is really in place tightly in both halves & you note they do the tightening down more than once....they Do Not cut too much off first time but progressively trim.
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Re: rear main seal info

Post by Corne Lauwerijssen » Sun Nov 10, 2013 7:53 am

I also had very bad experiences with rear means seals with a couple engines! These where sold as NOS by a known vendor and I also bought new seals from another known vendor.

The NOS seals where turning around with the crank and held by flywheelbolts.
The new seals where to large. To get them fit perfectly I should have to shorten them about 3mm. (Iam not talking about the 3/8 round rubber ends)

Later I found very good new seals somewhere else, they fitted like they should do! Last week I had a talk with the vendor who sold the NOS seals and he told me honestly that they are produced in Korea and that shouldnt buy them!
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Re: rear main seal info

Post by artificer » Sun Nov 10, 2013 10:59 am

Adjusting round seals by shortening [cutting some off] should not be attempted as then the seal will be out of round when tightened & leak. Any doubt discard the seal.
The round side seals also should not be trimmed.
Last edited by artificer on Tue Nov 19, 2013 2:14 pm, edited 1 time in total.
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Re: rear main seal info

Post by REG » Sun Nov 17, 2013 12:11 pm

Just been to a militaria fair and everyone was selling rope seals.

I've just taken the 'plastic' seal out of mine - the inside looked like it had been overheated and was a bit 'chewed' (not the right word) but it had never leaked.

My (1989 Hotchkiss) block is in the process of a complete tear down and this is one of the pieces of work that I have agreed needs doing.

The rest of the work is for another thread, not here.

The guy doing the work for me swears by the plastic seals, but branded/named ones.
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Re: rear main seal info

Post by griffo220 » Sat Mar 29, 2014 12:46 am

Hi guys, I've just fitted a. Payen seal to my rebuild and it's great, it fitted a dream and has less resistance on the crank than the rope type so engine spins a lot quicker now and no leaks :)

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Re: rear main seal info

Post by rllobo_98 » Sat May 03, 2014 8:36 am

Hi,
I got a new rope type oil seal from Ron. It´s a Felpro BS 3165. Should I immerse it in oil before placing it into the slot of the cap and engine block? The installation instructions contained in the package say nothing about it.
The video shown above here by Artificer shows that the guys takes it from a bath of oil and then install it. What do you think? :roll:
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Re: rear main seal info

Post by artificer » Sat May 03, 2014 11:54 am

I would, but if you want another opinion ask Ron who offers an engine re-build service, from memory, so he would be doing a few overhauls.
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Re: rear main seal info

Post by Marty, SoCal » Thu May 15, 2014 11:23 am

The dry seals like the current Fel-Pro rope seals should be soaked in oil. Older rope seals were wax impregnated and somewhat preformed, no oil soak needed on that type except for a smear on the crank before final install.

Anyone have a stateside source for the Payen seals and/or gasket sets?

Can someone in Britain or Europe post the Payen part numbers for the rear seal and the complete set?
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Re: rear main seal info

Post by cjv-35 » Fri May 16, 2014 9:55 am

Has anyone tried the new rear main seals that John Bizal offers over at Midwest Military Parts ? He claims they will not lock up your crank. :o

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rear main seal info

Post by wo2jeeper » Fri May 16, 2014 12:43 pm

Image this is what you need ? These are avaible in the Netherlands.

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Re: rear main seal info

Post by Marty, SoCal » Sat May 17, 2014 7:14 am

Must be old stock, the online Payen catalog does not list any Willys engine gaskets. Searching the 75701 part number gets no results at the Payen website, either.
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Re: rear main seal info

Post by wo2jeeper » Sat May 17, 2014 7:58 am

Is indeed old stock, the excisting source has them from French surplus.


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