Special tools
- Camshaft alignment tool 1 – BMW No.11 4 281.
- Camshaft alignment tool 2 – BMW No.11 4 283.
- Flywheel/drive plate timing pin – BMW No.11 0 300.
- Camshaft position (CMP) sensor disc setting tool – BMW No.11 8 520.
- Timing chain pre-tensioning tool – BMW No.11 9 340.
General precautions
- Disconnect battery earth lead.
- Remove spark plugs to ease turning engine.
- Turn engine in normal direction of rotation (unless otherwise stated).
- Observe tightening torques.
- If fitted: Mark position of crankshaft position (CKP) sensor before removal.
- Do NOT turn crankshaft via camshaft or other sprockets.
- Do NOT turn crankshaft or camshaft with timing chain removed.
Valve timing procedures
- Removal/installation of timing chain requires:
- Sump removal.
- Engine at TDC on No.1 cylinder.
- Remove blanking plug from cylinder block.
- Insert flywheel/drive plate timing pin [1] .
NOTE: Engine should not turn if flywheel/drive plate timing pin fitted correctly.
- Ensure camshaft lobes for No.6 cylinder at rear of engine are positioned as shown [2] .
- Ensure camshaft alignment tools can be fitted [3] & [4] .
- If not, adjust camshafts as follows:
- Slacken central bolt on each camshaft adjuster [5] .
- Hold camshafts with spanner on hexagon [6] .
- Rotate camshaft until camshaft alignment tools can be fitted [4] .
- Camshaft rotation possible using spanner on hexagon [6] .
- Ensure camshaft lobes for No.6 cylinder at rear of engine are positioned as shown [2] .
- Install CMP sensor disc setting tool and fit to cylinder head [7] .
- Ensure dowel pins of CMP sensor disc setting tool [8] aligned with sensor disc locating holes [9] .
- Remove timing chain tensioner [10] .
NOTE: If chain tensioner is to be re-used it must be drained of oil. Compress plunger slowly twice.
- Install timing chain pre-tensioning tool [11] .
- Screw in adjusting screw until in contact with tensioner rail.
- Pre-load timing chain with pre-tensioning tool to 0,6 Nm [11] .
- Tighten central bolt on each camshaft adjuster [5] . Tightening torque: 20 Nm + 180°.
- Hold camshafts with spanner on hexagon [6] .
NOTE: Central bolt of camshaft adjusters MUST only be used once.
- Remove:
- Flywheel timing pin [1] .
- CMP sensor disc setting tool [7] .
- Camshaft alignment tools [3] & [4] .
- Timing chain pre-tensioning tool [11] .
- Install timing chain tensioner [10] . Tightening torque: 55 Nm.
- Turn crankshaft two turns clockwise.
- Ensure flywheel timing pin and camshaft alignment tools can be refitted [1] , [3] & [4] .
NOTE: Crankshaft pulley central bolt MUST only be used once.