Removal (633CSi & 733i)
- Remove upper engine front cover. Remove timing chain tensioner plug, spring and piston. Remove fan. Remove drive belts from crankshaft and fan pulleys.
- Hold crankshaft in place and remove vibration damper and hub. Remove TDC position sensor and bracket from cover. Remove oil pan-to-front cover attaching bolts.
- Loosen remaining oil pan bolts. Remove remaining cover attaching bolts. Carefully separate lower front cover from oil pan.