Special tools
- Camshaft alignment tool – Tool No.T10171.
- Dial gauge – Tool No.VAS 6079.
- Dial gauge holder – Tool No.T10170.
- Tensioner locking tool – Tool No.T40011.
- Crankshaft pulley/camshaft sprocket holding tool – Tool No.T10172.
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:
- Timing chain cover removal.
- Sump removal.
- Install dial gauge and holder in No.1 cylinder plug hole. Ensure engine at TDC on No.1 cylinder [1] .
- Ensure timing marks on camshafts aligned as shown. If not, turn crankshaft 360° [2] .
- Fit camshaft alignment tool [3] .
NOTE: If camshaft alignment tool cannot be inserted valve timing is incorrect.
- Fit tensioner locking tool [4] .
- Remove camshaft sprockets and chain.NOTE: Inlet camshaft sprocket bolt has LH thread.
- Align camshafts. Use special tool [3] .
- Install camshaft sprockets and timing chain.
- Tighten camshaft sprocket bolts. Tightening torque:
- Inlet camshaft sprocket – 40 Nm + 90°.
- Exhaust camshaft sprocket – 50 Nm + 90°.
- Tighten crankshaft pulley bolt to 150 Nm + 180°.
NOTE: Crankshaft pulley bolt and bolt on each camshaft sprocket MUST only be used once.
- Remove camshaft alignment tool. Turn crankshaft two turns clockwise.
- Check valve timing [3] .