My friends in Russia have two broken engines. The first is FD with 20B Cosmo RE. Engine was broken down after 2-3K miles. The simptoms are broken bearing in front stat. gear. Man use OS flyweel with 2 plate clutch and 20B AT counterweight. The second car is FD too with AT to MT swap. Flywheel and clutch is the same. A conterweight is from AT FD. Problems are the same.
I built cosmo with 13B-RE. AT/MT swap, OS clutch and flywheel, AT cosmo counterweight. I am in scare!
Other FD guy use OS clutch/FW/AT counterweight has no problem with his RE. But he keeps MT front counterweight. The car was MT.
I need your opinions!

 

Unless the engines had bad vibrations to begin with, the counterweights sound fine. Can you be more specific on the bearing failures. Did the bearings walk/move out of position, did they wear through the babbet too quickly or did the stationary gear teeth fail? What is the max rpms these failed motors have seen?

 

I'll talk with guys in detail and try get photos.
Thank you.