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New One Piece BOP Rear Main Seal

  
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New One Piece BOP Rear Main Seal

 
bigD bigD
User | Posts: 129 | Joined: 05/14
Posted: 05/04/14
05:55 AM

Has anybody on this site used one of the BOP one piece rear main seals yet ?

If so, how does it work ? Easy to install ? Leak free ?

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

I have now read of a few who have tried one. All reporting easy install and no leaks so far.   Smile  

gtojack1366 gtojack1366
Guru | Posts: 1250 | Joined: 11/09
Posted: 05/04/14
06:37 AM

It looks like getting the seal over the crank and in the block would be a pain .  I used the two peace Viton seal with no problems .576 Zpsefc09fc7  

bigD bigD
User | Posts: 129 | Joined: 05/14
Posted: 05/06/14
05:59 AM

I think the seal is cut in one place and the ends butted on the block side.

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

I believe it is recommended that you have the serrations polished off the crank if they are too aggressive--but no more than .006.

Here is a link with some more info on the subject.

http://www.tinindianperformance.com/will-pontiac-crankshaft-serrations-shred-chew-up-a-tin-indian-performance-viton-rear-main-seal/  

gtojack1366 gtojack1366
Guru | Posts: 1250 | Joined: 11/09
Posted: 05/06/14
02:35 PM

It sounds like a lot of crap to me cutting a one piece seal . Just use the two piece seal it works fine .  

bigD bigD
User | Posts: 129 | Joined: 05/14
Posted: 05/07/14
02:32 PM

Icon Quotegtojack1366:
It sounds like a lot of crap to me cutting a one piece seal . Just use the two piece seal it works fine .



Actually, the two piece seal is twice as likely to leak as a one piece, simply because it has two places where two ends are butted together. The one piece only has one place where the ends are butted together, therefore twice as many places for the two piece to leak.

If this seal works well, I consider it one of the best Pontiac products to come on the market.

Of course I'll have to put alum heads, cheap Chinese rods and stroker cranks, and aftermarket blocks ahead of the seals in importance.   Smile  

gtojack1366 gtojack1366
Guru | Posts: 1250 | Joined: 11/09
Posted: 05/07/14
02:49 PM

A two piece seal is machine cut and fits together perfect .They want you to cut the one piece seal with a razor blade,then spreading it apart distorting it to install it ? Sounds like crap to me . My two piece seal works perfect . With no leaks .  

1979TA461 1979TA461
User | Posts: 63 | Joined: 06/13
Posted: 06/16/14
04:42 PM

I used the one piece seal and it worked perfectly.  After you cut it and put it around the crank you turn the seal so the cut is at the top.