This is a proper mystery for the seasoned detectives. 2012 3.6 Wrangler. The engine overheated at 250k miles after coolant hose to the heater of the car cracked on a journey. Drove the car 10 miles before realizing the coolant loss. Left the car to cool completely and then filled it with water and drove it home another 20 miles. Water leaked from the head gasket, but did not go into the oil.
Heads were machined and valves reseated. Pistons looked great and the top of the block looked even as measured by hand tools in the engine bay.
Replaced in the overhaul all with original Mopar parts:
- the camshaft timing chains and guides, did not replace chain tensioners and the oil pump chain as it required the oil pan to be removed
- all lifters
- all rockers
- 3 valves, which were worn
- all valve oil seals
- PCV valve
- spark plugs
- head bolts
- new head gaskets
Head bolts were tightened in required pattern and to torque specs.
Oil cooler assembly was replaced once already, so did not replace it this time.

2-3 weeks after the overhaul I was towing a light trailer. Going up a small hill, the engine suddenly lost power and started blowing oil through the welds on the plank holding the oil dipstick to the head. Imagine what pressure it took to bust the welds. Drove with low power for 3 miles and fixed the dipstick. The engine somewhat regained its power but started spitting through the breather houses(mainly from the driver side head) into air intake 1 quart of oil every 500 miles. Oil cooper assembly is also leaking a bit into the v-valley of the engine. The engine has difficulty accelerating past 4000 rpm in gear and spits oil even faster at these high RPMs. I thought the piston rings must be gone and creating oil pan pressure. Just tested the compression. Each cylinder is 170-180 PSI, which should be perfect. The oil mainly leaks through the air filter box, but when it is too much, gets suckd into the intake and burns through the cylinders. Spark plugs are clean. Volante round air filter is all soaked in oil.

Any suggestions to solve the mystery of why the engine is spitting oil into the air intake and has no power will be well appreciated. Is something connected wrong? Could have the block warped? Did the new PCV valve suffered when the engine blew oil through the dip stick welds? Could the oil cooler assembly been damaged in the overheating and be blocked?

Thank you in advance