Pontiac Street Performance
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password

 All Forums
 Pontiac Performance
 Tempest / Lemans / GTOs
 Viton rear main seal Pontiac 455
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

beertracker
Cochise

427 Posts

Posted - 04 Jan 2019 :  4:10:06 PM  Show Profile  Reply with Quote
http://bopengineering.com/beltdrive_acc_topend.shtml

I am not sure to buy the one piece or two piece Viton rear main seal? Is one better than the other? With the one piece it appears I have to stretch the seal over the crank? After stretching does it tend to leak?

With the two piece it has two seams would these tend to leak?

I noticed three rear main grooves in the rear main cap and rear main block so is only one rear main seal used?

Is BOP the only place to buy Viton rear main seals?

Thanks,
bt

tjs44
Crazy Horse

USA
604 Posts

Posted - 04 Jan 2019 :  6:12:28 PM  Show Profile  Reply with Quote
ONLY the 1 pc!I just order one today for a 3in main along with the BOP 1 pc pan gasket.We have used 3-4 of the 1 pc and are 100% dry,with the 2pc im 50/50 on dry/leakers.If not the one pc BOP the only other one I would use is the Best Gasket grafite rope seal,im 100% with those also.Tom
Go to Top of Page

Steve C.
Chief PONTIAC

1995 Posts

Posted - 04 Jan 2019 :  6:31:17 PM  Show Profile  Reply with Quote
BOP is the only one who sells a rear main seal made from Viton material. The other similar seal is not true Viton material and a different color, it's knock off of the BOP seal.

https://www.youtube.com/watch?v=2U9zSrfEJmM

If you have any questions about installation or the grooves in the block do not hesitate to call Wade at BOP, a great guy !



.

Edited by - Steve C. on 04 Jan 2019 6:34:15 PM
Go to Top of Page

Steve C.
Chief PONTIAC

1995 Posts

Posted - 04 Jan 2019 :  6:39:57 PM  Show Profile  Reply with Quote
TOM, I cannot remember if you are still supposed to polish off the anti rotation ridges on a stock crank ?

Go to Top of Page

beertracker
Cochise

427 Posts

Posted - 05 Jan 2019 :  12:51:44 AM  Show Profile  Reply with Quote
quote:
Originally posted by Steve C.

BOP is the only one who sells a rear main seal made from Viton material. The other similar seal is not true Viton material and a different color, it's knock off of the BOP seal.

https://www.youtube.com/watch?v=2U9zSrfEJmM

If you have any questions about installation or the grooves in the block do not hesitate to call Wade at BOP, a great guy !

Great video!! bt



.

Go to Top of Page

beertracker
Cochise

427 Posts

Posted - 05 Jan 2019 :  01:43:16 AM  Show Profile  Reply with Quote
Just ordered the 1 pcs Viton rear main seal and valley pan grommit. My crank is a 3.25" factory. Now back to the garage! bt

Edited by - beertracker on 05 Jan 2019 5:43:45 PM
Go to Top of Page

tjs44
Crazy Horse

USA
604 Posts

Posted - 05 Jan 2019 :  5:38:58 PM  Show Profile  Reply with Quote
Steve,I really need to ask!I have always had someone else put the short blocks together and none of them leak.3 are factory cranks and one Ohio.Only 0ne was a 3 1/4 main.Tom
Go to Top of Page

Steve C.
Chief PONTIAC

1995 Posts

Posted - 05 Jan 2019 :  6:55:09 PM  Show Profile  Reply with Quote
Lazy me, I should of looked :) A small amount of silicone sealant in the anti-rotation holes to close them off. I didn't remember if they were holes or ridges since I haven't used a factory crankshaft in many years.

Here it is.... "Fill anti-rotation holes
with high temp sealer
level with bottom of
groove."

https://www.bopengineering.com/seal_instructions.pdf


.

Edited by - Steve C. on 05 Jan 2019 7:00:17 PM
Go to Top of Page

tjs44
Crazy Horse

USA
604 Posts

Posted - 05 Jan 2019 :  8:38:02 PM  Show Profile  Reply with Quote
Steve,I think that is the 2pc instructions?Tom
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Pontiac Street Performance © 2006-2017 Go To Top Of Page
This page was generated in 0.14 seconds. This Site Sponsored By:
Powered By: Snitz Forums 2000 Version 3.4.05