Checking/renewing spark plugs Check synchronising (Inspection II)/renewing (Inspection III) (Inspections I, II and III) • The engine must be at regular operating temper- ature. 12 3 510 C000060 • Unscrew and remove spark plugs with the spark plug wrench, BMW No. 12 3 510 . • Connect the BMW Synchrotester hose to the vacuum stub pipe (arrow) and the lines to the MoDiTeC . L Note: If the left/right readings differ by more than 30 milli- bars (0.42 psi), check the air intake system for leaks. e Caution: Do not bend electrodes - risk of breakage! Electrode gap: .......................... 0.8 mm (0.031 in) Gap wear limit :........................... 1.0 mm (0.039 in) X Tightening torque:
Spark plug.................................................... 20 Nm 00.27 C000220