Special tools
- Exhaust camshaft alignment tool – BMW No.11 9 291/3.
- Inlet camshaft alignment tool – BMW No.11 9 292.
- Inlet camshaft turning tool – BMW No.11 9 270.
- Flywheel/drive plate timing pin – BMW No.11 5 120.
- Sensor gear alignment tool – BMW No.11 9 350.
- 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 rear of camshafts correctly aligned [2] .
NOTE: Curved profile at rear of camshaft points upwards [3] .
- Ensure camshaft adjusters set in the installation position as follows:
- Install inlet camshaft turning tool at rear of camshaft.
- Attempt to turn inlet camshaft slowly in opposite direction of rotation.
- If camshaft turns, continue turning until locked in position.
- Attempt to turn exhaust camshaft slowly in direction of rotation.
- If camshaft turns, continue turning until locked in position.
NOTE: In the installation position camshafts cannot turn freely.
- Install inlet camshaft alignment tool [4] .
- Install exhaust camshaft alignment tool [5] .
- Timing correct when inlet camshaft alignment tool abuts cylinder head or is raised up to a maximum of 0,5 mm on inlet side. Timing correct when exhaust camshaft alignment tool abuts cylinder head or is raised up to a maximum of 1 mm on inlet side.
- If not, adjust camshafts as follows:
- Slacken bolt on each camshaft adjuster and then re-tighten by hand [6] .
- Install inlet camshaft alignment tool [4] .
- Align inlet camshaft. Ensure inlet camshaft alignment tool abuts cylinder head.
- Install exhaust camshaft alignment tool [5] .
- Tighten exhaust camshaft alignment tool to cylinder head.
- Tighten bolt on exhaust camshaft alignment tool until it rests on inlet camshaft alignment tool [7] .
- Tighten inlet camshaft alignment tool to cylinder head [4] .
- Remove tensioner [8] .
- Install timing chain pre-tensioning tool [9] .
- Screw in adjusting screw until in contact with tensioner rail.
- Replace bolt on each camshaft adjuster and re-tighten by hand [6] .
- Install sensor gear alignment tool and secure to cylinder head [10] .
- Slacken bolt of each camshaft adjuster by half a turn [6] .
- Pre-load timing chain with tensioning tool to 0,6 Nm [9] .
- Tighten bolt of each camshaft adjuster [6] . Tightening torque: 20 Nm + 180°.
- Remove flywheel/drive plate timing pin [1] .
- Remove sensor gear alignment tool [10] .
- Remove camshaft alignment tools [4] & [5] .
- Remove timing chain pre-tensioning tool [9] .
- Install tensioner assembly [8] . Tightening torque: 65 Nm.
- Turn crankshaft two turns clockwise.
- Ensure flywheel/drive plate timing pin and camshaft alignment tools can be refitted [1] , [4] , [5] & [10] .
- Timing correct when camshaft alignment tools about cylinder head [4] & [5] .
NOTE: Crankshaft pulley central bolt MUST only be used once.
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