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Old 01-25-2004, 07:50 PM   #1
mybluesubi
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Subaru Stars real main seal

I'm having a problem with the rear main seal leaking. I once replaced it and it continues to leak. I did notice that there's nothing to hold the seal in place. Is there a way to get the seal to stay in and not slide back out? If anyone has any solutions to this problem please email me. thanx
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Old 01-26-2004, 02:25 PM   #2
SubyTechMaster
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A more common leak which is often misdiagnosed as the rear crank seal is the Oil Seperater cover(located to the right of the Crank seal in the rear of motor). If yours is plastic replace it with an aluminium part.

If indeed your Crank seal is the source of the leak then you have another problem causing it to fail. Check your PCV system.
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Old 01-27-2004, 03:55 AM   #3
mybluesubi
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thanx for your help, I took it all apart again tonight and put some gasket sealant on the oil seperator gasket and it thus far (knock on wood) is doing the trick, where could Iget an aluminum seperator cover?
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Old 01-27-2004, 12:57 PM   #4
Charlie-III
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Dealer has the aluminum version. IIRC it was about $30.

The later models got that one from the factory (I did this when I did rear crank seal/flywheel/clutch)
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Old 01-29-2004, 03:37 PM   #5
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I really hope that solves your problem,but if it doesnt then if the rear main seal is leaking again than your problem is blow by gases from your crankcase cause by worn piston rings or damaged rings.good luck i hope im wrong.
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Old 01-30-2004, 03:00 AM   #6
mybluesubi
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Ok wish me luck, I'm gonna tear it apart a 3rd time in a week to change the separator plate to an aluminum one tomorrow. If this doesn't do the trick would anyone like a pimped out impreza wagon? After talking to several ppl and a couple Subi dealers I think this will do the trick, thanx all for your responses and I'll keep you all posted on what happens.
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Old 02-06-2004, 03:42 PM   #7
Charlie-III
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Hmmmm......wondering what happened.
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Old 02-06-2004, 07:04 PM   #8
mybluesubi
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Ok a friend and I are gonna put a new oil separator on in saturday morning. I bought a new plate built outta aluminum so this should do the trick, I'll keep y'all posted and hope to god this works. I've read in many places that when there's oil leakin outta the rear fo the engine it's normally due to the oil sep cover and not the rear main seal, I did already replace the rear main seal so I know it's not comin from there. everyone, thanx for your help and teaching me yet another thing about the beauty of all wheel drive
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Old 02-07-2004, 03:53 PM   #9
Charlie-III
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No problem.

I wish I knew of some of these forums BEFORE I had problems.

You have it a bit easier.
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Old 02-09-2004, 11:07 AM   #10
mybluesubi
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ok here it is peeps. I changed the oil separator plate on saturday and I'm still having the leaking problems. I also noticed that the rear main seal had been "pushed" out and not in place where it should be. My oil pressure gauge reads about 50-55 on cold start up and doen'st go above 30 after warmed up at 4k RPM. The only thing I can figure is that there is an extrodinary amount of oil pressure at the rear of the engine but not at the pressure sending unit. The only thing I can imagine that would do that is a clogged oil galley or something causing the oil not to have the same pressure in the entire system. If anyone else has any theories or ideas please please let me know.
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Old 02-09-2004, 01:08 PM   #11
SubyTechMaster
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Check your Crankcase Positive Ventilation (PCV)
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Old 02-09-2004, 07:28 PM   #12
mybluesubi
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ok I've come up with a solution to the problem, I'm just gotta get another engine for it. BTW I also checked the PCV and in fact changed it just for the hell of it and still the same thing. thank you everyone for your help and I'll see y'all next time I have a problem
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