BOP Buick Two-Piece Lip Rear Main Seals

With the mandated removal of asbestos from rope seals, increased leakage has become commonplace. BOP Engineering has designed a state of the art rear main seal for the Buick V-8’s. These seals are not a retrofit from some other engine, but designed from a clean slate using state of the art technology and the best materials. 20 plus years of proven sucess makes this the best two-piece seal on the market.

Click here to view install procedures (Requires adobe acrobat)
Step by step instructions

Application	Engine
RMS02 Buick V8 '67-'76	400, 430, 455 CID (Big Block)
RMS04 Buick V8 '68-'80	350, CID (Small Block)
RMS07 Buick V8 '57-'66	364, 400, 401, 425 CID (Nailhead)

The BOP Engineering One-piece rear mail seal is the most advanced rear main seal on the market. This revolutionary design features a double lip design to provide more protection against leakage as well as outstanding vacuum numbers. The seal has a flexible steel core which is split in one location where the seal is to be sectioned and then spiraled around the crank. Note that this seal is not a “direct fit” for the Buick V8 which is why a section must be removed, but has been used with great success. Note that the crankshaft must be removed to install this seal.

Click here to view install procedures (Requires adobe acrobat)

Best Gasket Buick Rope Type Rear Main Seals

For those of you who want to retain the factory type rope seal and avoid the current non-asbestos fiberglass core rope seals available in most kits this is the seal for you. Made by Best Gasket company the Graphtite™ rope seal is a cost effective solution to rear main seal leaks. It also works well with blocks whose seal grooves are not suited for the two piece rubber rear main seal such as blocks that have been align bored numerous times.

Buick V-8 Oil Pan Gasket

Replace the factory style cork gaskets with this high quality Oil pan gasket when changing your rear main seal.

Buick Front Crank Timing Cover Lip Seals

Replace the original rope style front crank seal with this lip design seal to ensure leak free performance. Small blocks have a 1.937 inch damper sealing diameter whereas the big blocks and nailheads have a 2.000 inch damper sealing diameter and require the BFS102 shaft sleeve with BSS101 seal.

Buick Harmonic Damper Sleeve

For use with the BFS101 Front Crank Seal this sleeve fits on the 1.990 diameter damper hub bringing it to 2.00 inches. It also makes the seal surface smooth and groove free. While not manditory it is highly reccomended. Fits 364, 400, 401, 425, 430, 455 CID (Big Block) Buick V-8

Big Block Buick Front Timing Cover Gasket Set

Big block Buick timing cover gasket set is cut from high quality gasket materials for a leak free install.

BTC113 Front Timing Cover Gasket Set Big Block Buick)..................$19.99

The ultimate distributor/oil pump drive gear for the Buick V-8. This gear is far superior bronze or melonized distributor gears when using solid or hydraulic roller cams. Do Not confuse these with melonized gears. Melonizing is a surface treatment that will wear off quickly. There is no comparison.These gears have proven themselves in both race and street engines with excellent results. Never worry about metal shavings in your oil again!