Simple one for the SBC folks? Major or minor operation? [Archive]

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Crease

11-09-2003, 11:30 PM

79' Chevy small block rear main seal (2 bolt main).

After leaking a quart on the way to Temple, I figure it's time to replace it. Do I have to pull the crank or just the cap?

Thanks for the info in advance guys.

McGrath

11-09-2003, 11:40 PM

You can do it by pulling just the Cap.

Crease

11-09-2003, 11:43 PM

Yee haw! Thank you sir!

McGrath

11-09-2003, 11:46 PM

I have heard that its easier if you loosen all the Mains so the Crank drops a little. I have only done it once and I got it in without loosening the rest up, but it does make sense.

Revhead

11-10-2003, 12:53 AM

It's not bad of a job at all really. I would loosen the caps though like he suggested. Besides might as well re-torque them while the pan is off anyway.

grtpmkn

11-10-2003, 01:49 AM

Also just a tip, when you install the new 2 peice rear main seal, offset it about a 1/4 inch,..keeps em from blowin out again...

Baumi

11-10-2003, 03:00 AM

I did it without loosening all of the main bearing caps.The new seal will slide in pretty easy.
There comes a little piece of plastic with every new seal which helps you shoehorning the new bearing seal in place.