Special tools
- Camshaft alignment tool – BMW No.11 6 321.
- Camshaft locking tool – BMW No.11 6 322.
- Crankshaft alignment tool – BMW No.11 6 480.
- Crankshaft locking tool – BMW No.11 8 010 (AT version GM-5).
- Crankshaft locking tool 1 – BMW No.11 8 182 (AT version 6HP-19).
- Crankshaft locking tool 2 – BMW No.11 8 183 (AT version 6HP-19).
- Crankshaft locking tool 3 – BMW No.11 8 185 (MT version).
- Flywheel timing pin 1 – BMW No.11 5 180.
- Flywheel timing pin 2 – BMW No.11 6 080.
- Timing chain tensioner locking pins – BMW No.11 3 340.
General precautions
- Disconnect battery earth lead.
- Remove glow 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:
- 6 cylinders: Engine removal.
- Cylinder head removal.
- Sump removal.
NOTE: Refer to Autodata Technical Data for tightening sequence and torques.
NOTE: Refer to Technical Data module for tightening torques.
- Engine at TDC on No.1 cylinder.
- Remove blanking plug from cylinder block.
- Insert flywheel timing pin [1] .
- Ensure camshaft lobes are positioned as shown [2] & [3] .
- Install camshaft alignment/locking tool on inlet camshaft [4] .
- Ensure camshaft alignment/locking tool abuts cylinder head.
- Install camshaft alignment/locking tool on exhaust camshaft [5] .
- Ensure camshaft alignment/locking tool abuts cylinder head.
- Ensure timing marks on rear of camshaft gears aligned with upper edge of cylinder head [6] .
- If not, adjust camshafts as follows:
- Hold inlet camshaft with spanner on hexagon [7] .
- Slacken inlet camshaft sprocket bolts [8] .
- Align inlet camshaft. Use camshaft alignment tool [4] .
- Ensure camshaft alignment tool abuts cylinder head.
- Lock inlet camshaft alignment tool in position with locking tool [9] .
- Tighten camshaft sprocket bolts [8] :
- Tightening torque: 4 cylinders – 15 Nm. 6 cylinders – 14 Nm.
NOTE: Camshaft sprocket bolts MUST only be used once.
- Camshaft rotation can be prevented using spanner at position shown [7] .
- Remove flywheel timing pin.
- Remove camshaft alignment/locking tool.
- Turn crankshaft two turns clockwise. Check valve timing.
- To lock upper timing chain tensioner:NOTE: Only upper timing chain tensioner can be reset with front timing chain cover in place.
- Remove blanking plug [10] .
- Turn inlet camshaft slowly clockwise to compress the upper timing chain tensioner.
- Camshaft rotation possible using spanner on hexagon [7] .
- Insert timing chain tensioner locking pin [11] .
- To lock lower timing chain tensioner:
- Remove timing chain cover.
- Compress tensioner plunger. Fit timing chain tensioner locking pin [12] .
- To unlock timing chain tensioners:
- Remove locking pins [11] & [12] .
- Fit new crankshaft pulley central bolt.
- Tightening torque: M10 – 40 Nm + 120°. M18 – 100 Nm + 150°.
NOTE: Camshafts can be turned without valves contacting pistons when crankshaft is set at 45° BTDC on No.1 cylinder.
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