2350 Pushing Coolant

[Bigballercarhauler]

Hey guys looking for some insite here. Have a 600/2050 cm2350 reman that was dropped in 440k miles ago. I recently demandated the truck bout 6 months ago. Last week it started pushing coolant out the reservoir. Combustion was found in the reservoir. Up until today I suspected I possibly had one of those bad tunes. Head came off today and there’s really no signs of it running hot. It appears cylinders 3-6 may have sunk the liners I’m still waiting to hear back on the measurements but he said his nail won’t even catch on those as opposed to cylinders 1-2. Curious what you guys think bout how the pistons/cylinders look. I’m in the process of getting the tune pulled off the truck so it can be analyzed.

Also would like to hear your thoughts on possibly going to ss shims vs brass. I’ve heard mixed reviews and would like to get y’all’s opinion.