Rear main damage

[Dennis Pereira]

This is what I found after finally removing the rusted bolts from the mains I thought I could give this engine a shade tree repair. But as you can see its to far gone.

 

[Mike V. Florida]

If you want to shade tree it, you could just cut the rear thrust off leaving the rest of the bearing, and drop in the brass thrust/ slinger seal from snyders. It'll work. Or spend the big buck and do a total overhaul.

http://www.snydersantiqueauto.com/1421

Anyone done this?

 

[Dave in MN]

If you want to shade tree it, you could just cut the rear thrust off leaving the rest of the bearing, and drop in the brass thrust/ slinger seal from snyders. It'll work. Or spend the big buck and do a total overhaul.

http://www.snydersantiqueauto.com/1421

In addition to the break-up near the rear of the main bearing, if you enlarge the picture you will see there is a crack through the bearing that reaches to the front thrust surface of the babbitt. I think there is also some separation of the front thrust within 3/4" of the parting line on the valve chamber side of bearing. I think the combination brass seal and thrust would be a pretty short lived fix. I think it is time for new babbitt or inserts. By the way: The part you suggested works great when rebuilding an engine with inserts. When I use this part, I add a 1/2 circle thrust washer to provide a full rear thrust surface. I machine a recess in the cap to receive and retain the additional thrust. The block and the part shown above keep the additional washer from turning with the crankshaft.
Dave in MN