A mind boggler

So i have a 1999 12v ( yes i swapped it to a 12v 3 years ago) overhauled the engine 3 years ago. last January had what i thought was a head gasket failure. i had coolant leaking externally from the outside head stud on cylinder # 6. pulled it all apart to do a head gasket the gasket i used was a victor reinz last time so figure it was just a cheap head gasket but i decided to go the long route had the head taken to machine shop and head it checked for cracks and decked and new valve seals installed.

Reassembled the truck about a week ago used OEM marine head gasket .020 thicker then the stock one as the head had been decked twice. that i know of possible done before i got the truck once too.

Anyways i have been driving it for a week now, and up until now everything had seemed copesthetic. went to check it over last night and again i have coolant coming up around the same stud as last time! front radiator hose seems a little hard which concerns me.

Has anybody had this same issue?!?! like i covered all my bases torqued everything to cummins/arp specs. cant catch a break with this truck. any advise would be appreciated thanks!

A while back on here a guy had a similar repeat problem and it ended up being a hairline crack in the block.

yeah thats the only thing i can think of myself seeing as the head checked out fine. no idea how the block would have cracked all of the sudden.

Seen this with cracked blocks customers bring in.

Well i figured out what it was boys, Machine shop screwed meover and mised a crack in the cylinder head. now to find a new head.

When you do it again there isn't a need for a thicker HG. Milling the engine block deck requires one, not a valve job or milling the head.