Causes for leaking front main seal?

[240z4u]

Yes, I did replace it when I put the motor together several years ago.

Its leaking badly enough where there is ALOT of oil under my car.

Time for a front main seal.

What can cause this to leak? Is there anything I should do to make sure it seals well?

I have done them in the past, but never when the motor was still together.

Thanks guys - Evan

[Kansei240sx]

It just happens. It gets hot, cold, hot, cold, expands etc... and sometimes even though you think you did it right, they can get in there somewhat c***-eyed.

I just replaced my Front crank seal about 2 months ago myself. I just went and picked up a 300zx z32 camshaft seal, its the same part.

[240z4u]

Just to confirm, your saying the z32 front main seal will fit?

I thought thats what I had read. I really gotta get this oil leaking beast curbed. It looks like the damn exxon valdese parks in my garage.

Evan

[gawdzilla]

rb25det front crank seal = rb25det CAMshaft seal = z32 CAMshaft seal

weird huh

[240z4u]

Yeah that is bizarre, thats why I thought I read the post wrong.

Thanks alot guys, your help is greatly appreciated.

Evan

[rotorimp]

When you have the dampner off polish the surface that the seal rides on maybe there is a burr on it. Get the proper tool that will square up the seal in the motor.

[240z4u]

Good tip, I will have to get the proper seal installer and polish the surface.

Thanks - Evan

[Darius]

check the fsm to be sure but i think you need to lube the seal before puting the oil pump back on. otherwise the dry seal on the crankshaft will burn it and it wont seal anymore.

[gawdzilla]

make sure the front main seal lip doesn't fold up or bind when sliding it onto the crank.. the lip can roll onto itself a bit. if it does, either gently fix it with a screwdriver or pull it off and try again