Final answer:
Both Tech A and Tech B are correct. Valve rotators should be disassembled and cleaned during an engine overhaul to ensure they are free from dirt and debris that can affect their performance. Additionally, a valve rotator causing the valve to rotate in either direction indicates that it is functioning properly and allowing the valve to move as it should.
Step-by-step explanation:
Tech A says that valve rotators should be disassembled and cleaned during an engine overhaul. Tech B says that a rotator causing the valve to rotate in either direction is functioning properly.
Both Tech A and Tech B are correct. Valve rotators should be disassembled and cleaned during an engine overhaul to ensure they are free from dirt and debris that can affect their performance. Additionally, a valve rotator causing the valve to rotate in either direction indicates that it is functioning properly and allowing the valve to move as it should.