Removal (633CSi & 733i)
- Remove distributor. Remove upper engine front cover. Rotate crankshaft until No. 1 cylinder is on TDC at end of compression stroke. Timing mark on front cover should align with notch in vibration damper.
- Remove camshaft sprocket with timing chain attached. Remove chain from camshaft and crankshaft sprockets.
- If crankshaft sprocket removal is necessary, remove oil pan. Remove oil pump sprocket and drive chain. Remove Woodruff key from crankshaft. Using a puller, remove crankshaft sprocket.