Clevite Tri-metal or Bi-metal Mains

[Scotty B]

Hello everyone. Just about to start the assembly and my tolerance for the crank end play was right at .065-070".... That was with the Clevite 77 Tri-metal main bearings installed. After looking at a set of the Clevite A-series Bi-metal mains from someone else, I found out the thrust bearing is about .010-.015" fatter. So it's obvious that switching to the Bi-metal's is the way to go. I keep hearing that the Bi-metals are better for longevity and the tri-metal's are for high performance at the cost of less longevity. Just wondering if anyone has any info on whether that's true or not. I've already ordered a bi-metal set, so if anyone thinks using them instead to get the end play right is a good idea, please let me know. If so, anyone who want's to buy a new set of clevite 77's in .020 under with just the usual crank fitment marks on them for cheap, I'd be willing to sell them half price! Thanks everyone for any help you can provide!

[Scotty B]

Wow, its been weeks and no one has had this dilemma?

[jsawduste]

I built my engines with 77`s so I never looked back.

[GoatBoy4570]

0.065" is 1/16 of an inch sounds like you need a crank repair.

Bi-metal are finding their way into OEM they have some real advantages

[Sailboy42]

With tri-metals, they have significantly, more lead. So FYI