Final answer:
On engines where where the cam drive gear teeth mesh directly with the crank gear teeth, both Tech A and Tech B are correct. Timing gear backlash may be measured using either a dial indicator or a micrometer.
Step-by-step explanation:
On engines where the cam drive gear teeth mesh directly with the crank gear teeth, both Tech A and Tech B are correct.
Timing gear backlash refers to the amount of play or movement between the teeth of the cam drive gear and the crank gear. It is important to measure this backlash to ensure proper engine performance and timing.
Tech A is correct in saying that the timing gear backlash may be measured with a dial indicator. A dial indicator is a precision measuring tool that can accurately measure the movement or play between gear teeth.
Tech B is also correct in saying that the timing gear backlash may be measured with a micrometer. A micrometer is another precision measuring tool that can measure the distance or thickness of objects, including the gear teeth.
So, on engines where the cam drive gear teeth mesh directly with the crank gear teeth, both Tech A and Tech B are correct in their statements.