Timing the ignition 00 2 650 C120040 • Screw dial gauge holder, BMW No. 00 2 650 , and dial gauge, BMW No. 00 2 510 , into right or left spark plug hole. • Turn the engine over until the piston is at TDC. • Set the dial gauge pointer to zero. • Check the dial gauge reading. • Turn the engine over until the piston is at TDC. • The dial gauge pointer must be at zero. • Connect BMW MoDiTeC with adapter lead to the Hall-effect gate plate. • Adjust as stated in the tester guide. 12.11