[Steve C.]

Related......

Taken in part from Jim Butler comments, Q&A section, PE magazine March/April 1997:

They built two engines for Rodney's '82 T/A street car. Both engines had 455 blocks. One was filled and the other wasn't. The filled block ran 10 to 15 degrees cooler than the unfilled block. It was reported upon tear-down and inspection, the cylinder walls on the unfilled block were seen to be scratched and scored from excess friction. When measured with a dial bore gauge, it was found to be out of round. The filled block was smooth and bore round. He confirmed you do not lose significant coolant capacity by filling the block. However, the difference in the amount of friction is much improved.


Ken Keefer (Pontiac Dude) recommended this product to me years ago.
A good product and easy material to work with.

Rokblock Professional Engine Block Filler
Designed to expand into all interior voids. Helps prevent cylinder wall cracking and keeps cylinder walls round which will improve ring seal. 98% cured within 24 hours. Will not separate from block, even after many years of racing.

https://www.competitionproducts.com/...oductinfo/rok/



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