Re: Rear Block Babbitt
 

Well further info to share and have some insight.
The picture shows the block rear main and inside the red you will notice an elongated dark spot. That spot is a hole clean through the babbitt. Is this the source of my rear leak?
We sprayed brake cleaner into the hole and used air to see where or if it exited. We could not determine that but air from the underside of the rear main made fluid come out of the hole.
I'm pretty sure there should not be holes in the babbitt. What can be done about filling it in?

Re: Rear Block Babbitt
 

Yes: That is an issue as it will leak out of the engine through that area.
The babbitt on rear main is only secured by lag holes it is not fused to the metal.
Get a hardening sealer and carefully smear it into the hole after you've cleaned it thoroughly. Just make sure the oil groove is still open for the oil to traverse across where you've sealed it.

Re: Rear Block Babbitt
 

J and M Machine
What might you suggest for a hardening sealer?