When trying to install or remove a bearing race from a steel shaft, do you heat the shaft, or the bearing race? That's how I remember this physics answer..

I was reading the other day that a formula 1 engine when cold is actually cold seized. They have to bring the fluids up to operating temp long enough to heat the block.before starting the engine or ICE as they now call them.

We call that Cold Seizure , We would Ice the cooling system down with a Circulator Unit for Qualifing so we could tape up the Nose on the car , then heat the oil to about 300* .
The Purpose Built Qualifing Engines would do this at a Superspeedway , because we ran the piston to wall clearance so tight. After napcar banned qualifing engines we had to open up the piston to wall to prevent it.
I know on a Diesel that the Cylinder Pressure and Temps are way higher than a gas burner. You may have to open up the Clearance some more . I think the water recirculation is a must.

Tysons first piston example with 1&2 damaged would certainly fit a cold seizure if water is entering front of the block as normal C layout. The second one with 1&5 kinda has me wondering. #5 doesn't fit that same train of thought, and must have been a bit tighter in bore at start up.

When I was exploring forged piston options for my Dmax build back in 2010, we were talking overbore dimensions on 7 & 8 due to turbo position in the valley. Thay had noted the pistons at the rear were known to swell more than block due to radiant heating. At that time there wasn't options to include oil cooling passages inside a forged piston design. So I opted to stay with cast specifically for that reason. Latest build, using same cast pistons with modified bowl, and ring gaps you can read a book through. All the math says they should be happiest WOT around 200-215F ECT. But once again, it's all R&D when pushing these power levels in small cube marine diesels.

I'm thinking you would want as many constants as possible especially in an r&d enviroment, coolant and oil temps are both items that can be artificially raised to temp then maintained.

over a month and no updates.

whats the status Tyson?

Send him a private messagel. His company makes them. I have them on my boat and they are awesome.
Highly recommend them and they cover existing holes of common ones that stick up. You will need about an 1 1/2” or behind the area where you mount them.
Has black, chrome and I think polished aluminum.