For locking flywheel in TDC position on BMW N51, N52, N52K, N53, N54. * Turns crankshaft to TDC position while central bolt moves. * Put HCB-A1188-3 into calibrate hole (arrow ahead) and fixed crankshaft. * Attention: 1. There is a big hole make use of TDC position nearby calibrate hole. 2. When HCB-A1188-3 stayed in calibrate hole and locked flywheel, it is impossible to move engine through central bolt.
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