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Restoration & Repair Tips Board

rear main oil seal

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rich o

04-12-2012 14:58:25

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i just split the block from clutch housing on my massey 65,fun time ,all my precise moves failed when it just toppled right out of the cradle i had for hoisting it, oh well dont see any harm done just a couple of bent head studs. i told my wife it was like a surgeon dropping the heart on the operating room floor during surgery. but to my question. should i see engine oil in the clutch housing, small pool in a recess in the casting. is this normal or was it a leaky seal? on another note ,when my block bit the dust, i saw nasty greyish oily crap drain from one of the water ports on the top of the blockwere could this concoction have originated, im concerned, it was in the vicinity of cylinder 4. ithink this needs to be solved before i continue, thanks for ant advice

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Welding man

04-15-2012 09:24:28

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 Re: rear main oil seal in reply to rich o, 04-12-2012 14:58:25  
Rear main seal leaks on the Perkins' are not a common problem, but they do happen. The cork gasket on the rear of the oil pan is usually the culpret. Also check the input seals on the transmission. Good time to replace them while the engine is out.

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04-15-2012 04:18:05

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 Re: rear main oil seal in reply to rich o, 04-12-2012 14:58:25  
There should not be oil in the housing but in a fifty-year old tractor it is to be expected. I assume that you will be renewing the seal. While you have it out you should clean out the water jacket. During a complete rebuild blocks are usually "hot tanked" to clean them good inside and out. You could at least set it at an angle almost upside down on your engine stand and shoot water into the water passages while allowing it to run out. The gray oily stuff could have come out of an external low place behind the head. Some motors have a recess there. You should also replace the transmission input seal and bearing, and clutch release bearing while you are in there, rather then have one or more fail two months later.

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04-14-2012 19:22:42

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 Re: rear main oil seal in reply to rich o, 04-12-2012 14:58:25  
good luck with you repair

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