To make a longer story somewhat short. i supplied 3 blocks to a machine shops from 3 different sellers and to my belief all 3 the shop say is bad one block they told me can't be save on account the bearings scared the block just that bad (i can snag fingernail on it) and the other block has a hairline crack on the surface where the head bolts right under the #3 cylinder, and was discovered after block was almost fully assembled and was on my way to pick up. i asked a few car guys and they said that it may be able to be saved and see what another shop says. here are some pics i snapped

 

Hairline Crack block is junk.
I'm not sure how deep the damage is on the mains but could it possibly be line honed?

 

Yeah, the first block looks like it can probably be fixed with a line hone. You could probably even run it if it doesn't clean up all the way, as long as it doesn't have any raised metal that could push out the bearing and cause a tight clearance.

The second block is junk though. The machine shop should have caught that before doing all the work to it.

 

I have never see a IRON ls block crack like that. Maybe the block was frozen with water in it.

 

Yeah... I hope you didn't pay the machine shop for any assembly labor.

The very first thing a machine shop should do if they dont magnaflux it for cracks is to clean the decks, front and rear covers to remove any residual old gaskets. At this point, those cracks should have been noticed! If somehow it went unnoticed, it should have been found when the block was tanked.

Sounds to me like you should find another machine shop because this shop clearly has no attention to detail. If they can't see a small crack, don't expect them to do a thorough job of cleaning the block (or for that matter probably ever changing the fluid in the hot tank).

 

not sure how it would freeze being south louisiana never gets that cold, but yes i agree zraffz this motor was going in my dads' truck. this same shop put together my lq4 1year ago and as soon as i cranked it it held oil pressure for a few sec and fell off. so after racking my brain i pulled the oil pan with when motor was installed and go straight to the oil pickup tube. guess what they reused the one that was on the motor when i brought to them, and u know there response the kit didnt have a new one so i reused old one wtf!! after that i said f them, so now my dad going through same headaches and motor havent been even picked up yet...

 

i have 1 more block with same bearing issues and they said same thing . so when i get time off im bringing to another shop that i know that is way better than these *** clowns.

 

I agree with the others here, the mains should be able to be line honed if it isn't too deep. The crack in the block is now a boat anchor. Good luck with the build man.