Cracked head or liner?

[Marajin]

At the very least, he will need a new head and head gasket if it has over-boosted above 40 psi like that in its past. The head for sure will fail a magma-flux with several micro-cracks, especially if it has more than 450k miles on it. Don't waste the money getting it sent off and checked,.. use that cash towards a new one. He likely has leaky injectors and a lot of other heat related problems too. Replace the head and head gasket with brand new ones,.. not re-man. Perform an injector leak test on the injectors. Several of them are likely toast too. Replace any sensors that effect engine performance that are known to not read well as they age, like the IMAP and exhaust BP sensors, etc.

You will also need to check if it did not drop a liner by pressurizing the coolant system to 20 psi and letting it sit overnight with the oil pan off.

Get that terrible programming out of it and put 'MM' in it (the only isx tune that is worth a damn), set the power to something reasonable, and chok it up as "oops, I f##ked up".

It could have been much worse,,. he could have removed the VG turbo and put some after-market crap on there to the tune of several more thousands of dollars, further compounding his/her problems.

I hope you didn't actually pay good money for someone to put that crap tune in there,.. What a shame.