I need some LB7 help coolant leak

[blk smoke lb7]

Guys I I need help ,I have an 04 it was a theft recovery and they drove it like they stole it . Fast forward to now have a newer shop redo the heads,went to go fire it up coolant pouring out the band clamp under the truck.I pulled the glow plugs and antifreeze shooting out all 4 glow plug holes while cracking How the hell does antifreeze come out all 4 cyliders??? ARPS new c gaskets check the deck for flat before bolting the heads down my screw in injector cups .....I mean the head has to be bad right?

 

[Chevy1925]

I’d think so, were they pressure checked?

My lly heads cracked in all 4 exhaust ports on my cylinder head and 2 or 3 on the other. Coolant would pour out the exhaust till the truck warmed up lol

 

[blk smoke lb7]

Was your lly heads ported and they were pressure tested but its a relatively new shop.

 

[Bdsankey]

In order to get coolant into the cylinder either someone royally screwed up the gasket, the heads or cracked, or the cups aren't sealed properly. Being that they're threaded cups I would likely discard that as the issue. If they were pressure tested I'd be curious to know what they tested them up to.

 

[blk smoke lb7]

I agree,the motor only has 87k on it but as I stated it is a theft recovery and they drove it hard even jumping it in feilds.I used Victor grade c's as I always do and the threaded cups I have made I've used and sold many of, the same company making them and if it was a cup it wouldn't be all 4 cylinders unless all cups were bad which leads to either the block or head I have to assume its the head .I will ask what pressure was used I assume it would have to be tested at 400 psi .

 

[Chevy1925]

Was your lly heads ported and they were pressure tested but its a relatively new shop.

Nope, 100% stock heads. there is talk of "bad castings" that cause this but nothing 100%.

see what they tested them to and if it was in hot water or cold water. Ive had a few shops around here only test them to 50-70psi. its not a point to tell them it needs to be muuuuch higher.