Ad Radar
High Performance Pontiac
Click here to find out more!

One piece rear main seal

  
High Performance Pontiac
Item Posts    Sort Order

One piece rear main seal

 
1979TA461 1979TA461
User | Posts: 63 | Joined: 06/13
Posted: 05/31/14
06:32 PM

I built a 461 for my 1979 T/A 2 years ago and use the Viton 2 piece rear main seal.  I started leaking a little last fall so this spring I decided to pull my engine and replace the seal.  I called Butler and they told me about the new one piece Viton rear main seal.  I  put it in according to the directions and also used a one piece oil pan gasket.  I got my car back together and it doesn't leak at all.  I think this one piece is far superior to the 2 piece.  

bigD bigD
User | Posts: 155 | Joined: 05/14
Posted: 05/31/14
08:18 PM

Yeah, I consider this as one of the best Pontiac products to come along in quite a while. I've heard some skeptics, but nobody who has actually installed one with a bad report about 'em.

http://www.bopengineering.com/beltdrive_acc_topend.shtml

http://www.bopengineering.com/rms_18_installation_instructions.pdf  

ROWSLEY ROWSLEY
Guru | Posts: 1016 | Joined: 07/11
Posted: 05/31/14
10:04 PM

you would think the seal would come pre cut so people didn't f it all up!

i am shur up for no lower end oil leeks!  
76 455/4spd TRANS AM
69 GRAND PRIX 455/5SPD

shyrgfuh3 shyrgfuh3
Enthusiast | Posts: 496 | Joined: 11/13
Posted: 06/01/14
07:28 AM

are they saying to cut the one piece seal so it will have two ends?

well if so, it is no longer a gapless or endless seal therefore it can leak there.

the 5.0 mustangs use a one piece seal and it can be retrofitted into the early engines.  

1979TA461 1979TA461
User | Posts: 63 | Joined: 06/13
Posted: 06/01/14
04:25 PM

Yes you do cut it then wrap it around the crank.  You then rotate it so the cut is on the top in the block.  When you torque the main cap I think it forces the ends of the seal back together.  It seem to work very well, and I am all for having no leaks on the engine.  

gtojack1366 gtojack1366
Guru | Posts: 1278 | Joined: 11/09
Posted: 06/01/14
06:09 PM

Are you saying you cut the seal wrap it around the crank stick both cut ends in the block one on each side put the main cap back on and hope both ends meet back together at the top of the block ?  

1979TA461 1979TA461
User | Posts: 63 | Joined: 06/13
Posted: 06/01/14
07:23 PM

Yes and it works.