Final answer:
Excessive camshaft bearing clearance can result in lower oil pressure and cause a clicking noise when the engine is idling.
Step-by-step explanation:
When discussing camshaft bearing clearance, excessive camshaft bearing clearance may result in lower-than-spec oil pressure. The camshaft bearing clearance is the gap between the camshaft and the bearings that support it. If this gap is too large, it can lead to a decrease in oil pressure, as the oil can escape more easily.
On the other hand, Tech B is correct in saying that excessive cam bearing clearance may cause a clicking noise when the engine is idling. This clicking noise is the result of the camshaft moving within the clearance gap, creating a knocking sound.
Therefore, Both Tech A and Tech B are correct in their statements regarding excessive camshaft bearing clearance.