In some late models of distributors, how is the cam angle set?

The correct method for setting the cam angle in some late models of distributors is with the cap left on. This approach allows technicians to verify the position of the rotor in relation to the distributor cap without disturbing the connections or requiring access to internal components. When the cap remains on, it provides a clear reference point for confirming that the rotor's alignment corresponds appropriately with the ignition timing marks.

Utilizing this method minimizes the risk of miscommunication in timing adjustments that could arise from removing the cap, thereby ensuring a more straightforward and reliable setup of the distributor timing. This type of alignment procedure is essential for proper engine performance and ignition system efficacy.

In contrast, other approaches, such as removing the cap or using specialized tools, may introduce unnecessary complication, and adjusting the spark plug wires does not directly affect the cam angle but rather the ignition sequence or timing.