NHTSA Complaint #11544786 — 2018 FORD ESCAPE

On the first engine, a check engine light came on the dashboard, took it in, and was told code P300 was coming on but couldn't find where we were losing the coolant. Come to find out, the header was cracked and it was getting into the oil pan. We only had the vehicle for a few months since we purchased it. The second engine is, a replacement of the first and a used engine. Not even 400 miles and we start to get the check engine light on. He checked dtcs and found codes P300 P301 and P1299 stored, block tested the vehicle and the vehicle passed, performed a coolant leak test with the cooling system pressurized to 21psi and found no external leaks, removed cylinder 1 spark plug while leak testing the vehicle and found coolant on top of cylinder 1 piston.