Timing Component Alignment Marks: Locations
Timing Component Alignment MarksNOTE: BMW does not provide precise timing marks for the engine. Correct engine timing is achieved when certain conditions are met. Refer to Camshaft : Adjustments or Camshaft : Service and Repair
Adjustments
Service and Repair
CAUTION! Incorrect setting/installation without the use of special tools could damage or break the camshafts. Valves could also be bent through contact with the piston crowns. Always note installation instructions and use specified special tools, procedures, and sequences.
- Set cylinder no.1 to TDC by rotating engine in normal operating direction.
- Arrows on intake camshaft sprockets point up.
- Camshaft lobes at cylinder no.1 face in.
- 0/T mark on vibration damper aligns with pointer on front timing chain cover.
- Lock crankshaft at TDC using BMW special tool no.11 2 300 (arrow).
- Lock camshafts at TDC using BMW special tools 11 2 442/446 (cyl. 5-8) and tools 11 2 445/441 (cyl. 1-4). Install camshaft tools with letter A on exhaust side and letter E on intake side.
- Using hex casting on camshafts, turn camshafts slightly from side to side to ensure proper fit of camshaft locking tools.
CAUTION: The camshafts must be locked in the TDC position using BMW special tools at the rear of the camshafts. The arrows on the sprockets should not be used to set the engine at TDC.
If all of the above conditions are met, the camshaft timing is correct. If necessary, adjust camshafts by loosening camshaft sprocket bolts and adjusting.