911Joeblow,
I am currently running a 2006 6.5 Optimiser diesel in my CUCV, your kit sounds interesting after reading many of the post in SS. Would the kit even be beneficial to the newer motor I am running? I'm tracking that the newer engines had improvements in the heads that facilitated engine cooling. Please anyone feel free to chime in.
We are officially back open from our summer shop vacation Monday but I personally just got back this AM so why put off till Monday what I can do now! The Optimizer, GEP and Navistar 6.5 engines are all upgraded from the 6.2ltr. Depending on the vintage and manufacturer you will have any combination of metallurgy improvements, main cap design changes, block casting differences and my personal favorite the over sized rear two cylinders ONLY to allow for the known overheating there to not score the cylinders and pistons when those two grow more than the other pistons due to the heat. There were other design changes in the civilian and/or military engines like the dual thermostat crossover, larger water pump with reverse rotation, the angled fan on the HMMWVs, etc all to attempt to fix this issue. None of these do we recommend spending money on by the way. The inherent imbalance issue remains in every 6.2 and 6.5 built.
So though you have a better engine than the original 6.2, more power, and improved rigidity in the block, you still have overheated rear cylinders and undercooled front cylinders. Our kit will fix this. Have a good weekend.