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Rear main seal

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Wipa View Drop Down
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    Posted: 29 July 2017 at 4:54pm
Hello

I just rebuild from scratch a 1942 Willys MB. Not sure if the engine was actually from an MB or from a CJ2A, anyway, I rebuilt the engine with a ton of new parts since I wanted it to be “almost” brand new. The 3 year restoration is almost over but I´m having a hard time with the engine since it is leaking motor oil VERY BADLY from the crankshaft´s rear main seal ( I used a brand new 2 halves rubber seal that I bought from a French supplier).

Because the seal surface of the crankshaft was not in a very good shape (it was pitted), Instead of having it polished (like I probably should have done) I decided to buy a BRAND NEW crankshaft. I took off the engine, replaced the old crankshaft for the brand new one, installed a new rubber rear seal but when I started the engine, after a while the result was quite the same, ie, a bad case of engine oil dripping at the bell house.

The oil is really engine oil, not transmission oil.

I believe that the leakage is not coming from anywhere else but the rear main seal. I know that because I checked the rear oil gallery welch plug and also the rear cam journal welch plug.

Does anybody know how can I solve this problem??

Should I use a rubber seal or a rope seal?

The rubber seals that I installed (2 so far) were both WO800093. I heard that seals from this lot are all faulty. Is that true? If it is true where can I buy a reliable rubber seal?

If anybody could help me with this issue I would be very grateful because I am really tired of this everlasting restoration that should be over by now so I could enjoy my jeep while I’m young and of good health. Besides that In the island where I live this is the only Willys Jeep so it would be cool to show it to people who just saw this vehicles in the movies Smile

Thanks A LOT in advance for any help 

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Mark W. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark W. Quote  Post ReplyReply Direct Link To This Post Posted: 29 July 2017 at 6:54pm
You also need to know the diameter of the sealing surface on your "New" crank. They vary greatly and if to large will destroy the rear seal very quickly. 
Chug A Lug
1948 2A Body Customized
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ggordon49 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ggordon49 Quote  Post ReplyReply Direct Link To This Post Posted: 29 July 2017 at 7:57pm
I can not help you technically, but don't give up..... You will figure it out... Stay positive, all the hard work will pay off. You will be on those trails soon enough.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wipa Quote  Post ReplyReply Direct Link To This Post Posted: 30 July 2017 at 7:32am
Thanks a lot for your tip/advice. Do you know what the exact diameter should be?
Should I stick to the rubber seal or go for the rope seal instead?

Thanks a lot again
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wipa Quote  Post ReplyReply Direct Link To This Post Posted: 30 July 2017 at 7:37am
Thank you for the moral support, at this stage I really need it Cry . The last 3 years have been a crusade with a lot of time and money spent. I was hoping to drive it this summer but I do not think that it will happen.

Thanks again for your support.
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