AFN Engine Damage: Piston 4 Cracked - What Now?

Hi everyone, I previously posted about my engine misfiring as if it wasn't properly connected. I've found the problem. Piston number 4 is completely cracked. My engine has 168,000 km (approximately 105,000 miles) on it, and it was chipped to 145 hp (approximately 143 hp) at 100,000 km (approximately 62,000 miles), and then to around 170 hp (approximately 168 hp) at 160,000 km (approximately 99,000 miles) with 216 injectors and a VNT17 turbo. Could this have caused the crack, or is it a material defect?

Furthermore, everything needs to be brought back to working order. We have a workshop and VW mechanics available.
What would you do in this situation to fix the problem reasonably and cost-effectively? I'm considering buying a complete engine and selling the broken one, or should I have the crankshaft replaced?

Quote:

Could this have led to the crack, or is it due to material weakness?

We've seen something like that before.

Are you watching: https://community.dieselschrauber.org/en/viewtopic.php?t=12136&highlight=

The search function is located at the top.

Whether it's more cost-effective to overhaul or replace the engine depends on a calculation.