Final answer:
Both technicians are correct. A warped cylinder head mounting surface on a block can cause valve seat distortion and coolant and combustion leaks.
Step-by-step explanation:
Both technicians are correct. A warped cylinder head mounting surface on a block can cause valve seat distortion and coolant and combustion leaks.
When the cylinder head mounting surface is not flat due to warping, it can lead to uneven pressure distribution on the valve seats, causing distortion. This can eventually result in poor sealing and leakage.
Additionally, a warped cylinder head mounting surface can create gaps between the head and the block, allowing coolant and combustion gases to escape, leading to leaks.