Technician A says many balance shafts are supported by needle bearings. Technician B says as the piston approaches TDC, its force pulls the engine up. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because balance shafts can indeed be supported by needle bearings. Technician B is also correct because as the piston approaches Top Dead Center (TDC), the momentum and force can cause a slight upward movement in the engine block.

Technician a Says Many Balance Shafts Are Supported by Needle