Ignition Timing

With engine at normal operating temperature, connect a timing light and tachometer to vehicle. Disconnect and plug distributor vacuum line. Start engine and adjust idle speed. To adjust ignition timing, rotate distributor until center of ball embedded in flywheel is visible at edge of inspection hole.

Fig 1: Ignition Timing Mark Location

Courtesy of BMW OF NORTH AMERICA, INC.

IGNITION TIMING (Degrees BTDC@RPM)

Application

Static ⁽¹⁾

Dynamic ⁽²⁾

All Models

4°

25°@2500

⁽¹⁾	Reference value. Timing must be set dynamically.

⁽²⁾	Vacuum disconnected.