rear seal side seals can be a problem,i have used the type with the pins to drive in after the ruber is in place. the problem also can be not getting the rubet allthe way down.Ialso use a industrial silicone with a dabon each end of the reaseal its self and the sid rubers. e do not tighten the seal retainer untill the sid seals ar in plac. aftar the pins ar in use ths ind silicon allaround te sealretainer being sure the metal parts have no oil and ar dry. cat dealers uuse to sell the special silicone for persistent leaks on front covers 3406 trucks..the cam cor plug  use lock tight ,the permenent type,and do not drive it in to far. henry made this ear seal a pain in the ass,a few hale merrys ar worth a try after all this

This motor was built last year and maybe has only a hundred miles on it, so I am at a loss. Better get an engine run stand built and see what I can find. Thanks for the suggestions.

Jan  Urbanczyk  Major USMC Ret.

                                                                 Bowie Maryland

If the whole back end of the engine is oily, then I would also be considering the oil pump itself as the source of the oil leak.  The gasket above the pump is a strong candidate for oil to leak from.

Lorena, Texas (South of Waco)

Apparently to reasonably get those rear seals to hold, it's necessary to be very methodic about the replacement. Also, there have been a couple of later replacement seals issued. According to Ted Eaton, one of those seal isn't very successful. Try going to his site under rear main seals, for a procedure etc. 


Paul

If the engine has a lot of miles, the main bearings could have enough wear that crank pressure on the sealing area moves up and down, causing it to leak.

I'm with Pete on checking the rear cam plug because they have been known to leak.

-Gary Burnette-

Mark, I never stress, I have had this motor in and out of my car so many times I feel like I have zippers on it. I have another motor in the car so this winter I am going to find out is the story.

Jan  Urbanczyk  Major USMC Ret.

                                                                 Bowie Maryland

Mark, I never stress, I have had this motor in and out of my car so many times I feel like I have zippers on it. I have another motor in the car so this winter I am going to find out is the story.

Jan  Urbanczyk  Major USMC Ret.

                                                                 Bowie Maryland

Don't stress too much Jan I am sure one of the resident leakologists on this site (I am definitely not one) will suggest something.


Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

Pete, I have changed the seal, the seal housing, and nothing changes. I am in the process of building a temporary run stand,but thought I would see what this would tell me.

Jan  Urbanczyk  Major USMC Ret.

                                                                 Bowie Maryland