Final answer:
Cam lobe lift can indeed be checked with the cam still mounted in the engine by using a dial indicator to measure the lift directly. However, while cam runout can be theoretically measured with the camshaft in place, it often requires complex setups or specialized equipment, and removal of the camshaft is typically needed for accurate assessment.
Step-by-step explanation:
The question is regarding the verification of engine camshaft functionalities, specifically cam lobe lift and cam runout, and whether these can be checked with the cam still mounted in the engine. Tech A says that cam lobe lift can be checked with the cam still mounted in the engine. This is true; by using a dial indicator, one can measure the lift of the cam lobes directly through the lifter or pushrod without removing the camshaft. On the other hand, Tech B says that cam runout can also be checked with the cam still mounted in the engine. While this is theoretically possible, it typically requires specialized equipment and techniques to measure the runout of the camshaft accurately with it still in place, and often a complete camshaft removal is necessary for a precise measurement. It's important to note that the setup for measuring runout is usually more complex than measuring lift.