I need Ideas on what to check.

[RollinCoal]

The last cummins over hall kit I bought came with 3 sets of cooling nozzles, So they "should" have been new and the last thing to install on a build (to keep from damaging them)
Cracked liner Id have to pulled and inspect where the parts OEM or aftermarket?
Like Rawze said tho Usally a bad nozzle will endup with a cracked and or burt piston there job is to keep the pistons cool, thats why when the timing is jacked up in a tune you will see higher oil temps