88 4.0 rebuilt engine, blowing oil through cap

[fiddlermj]

And the pieces… now. When i changed oil it had like a finger nail clipping sizes. Some of that is like zinc additive you see in oil

[fiddlermj]

Ah i called him. He just measured rod crank part not the main bearing part. Where #3 was

[AZJeff]

Those bearings are TERRIBLE for having been run for such a short time.   That engine has serious issues that won’t be fixed by throwing a couple of quick parts at it.   The wiping of the shells down to the copper layer implies SERIOUS wear, and all the bearings have significant dirt/foreign material scratching, which screws up oil pressure.  
 

oddly enough, the two main journals that are visible look like they might be able to be polished smooth.

 

If you want this MJ to run reliably, I would start looking for a good used engine, or consider taking this one out and having a machine shop go through it from top to bottom.   By doing that, the shop can fix all the stuff that is trashing those bearing shells and causing the weird oil geyser issues.

[fiddlermj]

Umph. I hear ya.

[fiddlermj]

I had a ring busted when i decided to rebuild this thing. I really think…. Just trash and stuff did this. This is po girl build/hi class hunting truck. I'm going to clean and flush it best i can and polish the crank… and see what happens. I have a donor…. So…. Prolly gonna kill this one then….. swap.