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By Cactus - 11 Years Ago
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I am playing with a motor which appeared to have a leak at the rear main. Since it is now out of the car I put some light weight oil in it and spun the oil pump up to about 65 psi for five minutes and no leak anywhere. What am I missing here?
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By lyonroad - 11 Years Ago
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Just my 2 cents worth but I would think the motor would have to be running for the rear seal to leak.
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By Cactus - 11 Years Ago
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Mark, you are probably right, but this thing was not running when it was bleeding eight inch puddles on my floor. I have messed with this motor for about three years, replacing seals, etc. clutching at straws here.
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By Pete 55Tbird - 11 Years Ago
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One thing that you change by running the oil pump with the engine out is the motor is not getting up to temperature and there is no expansion. Have you tried changing rear main seal holder? Could it be coming from the rear of the cam? Try not to decide what the problem is without considering other options too. Pete
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By Cactus - 11 Years Ago
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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.
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By lyonroad - 11 Years Ago
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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.
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By Cactus - 11 Years Ago
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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.
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By Cactus - 11 Years Ago
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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.
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By speedpro56 - 11 Years Ago
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I'm with Pete on checking the rear cam plug because they have been known to leak.
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By ponymare - 11 Years Ago
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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.
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By PF Arcand - 11 Years Ago
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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.
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By Ted - 11 Years Ago
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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.
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By Cactus - 11 Years Ago
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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.
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By 2721955meteor - 11 Years Ago
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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
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