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How to Replace timing chain on BMW 330xd E46

Special tools

  • Camshaft alignment/locking tool – BMW No.11 6 320.
  • Crankshaft pulley turning tool – BMW No.11 6 480.
  • Flywheel locking tool 1 – BMW No.11 8 182/11 8 183.
  • Flywheel locking tool 2 – BMW No.11 8 010.
  • Flywheel timing pin – BMW No.11 2 300.
  • 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.
  • Do NOT turn crankshaft via camshaft or other sprockets.
  • Do NOT turn crankshaft or camshaft with timing chain removed.
How to Replace timing chain on BMW 330 xd E46
How to Replace timing chain on BMW 330 xd E46

Valve timing procedures

  • Removal/installation of timing chain requires:
      • 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.
  • 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.
      • Remove camshaft alignment/locking tool.
  • Install camshaft alignment/locking tool on exhaust camshaft [5] .
  • Ensure camshaft alignment/locking tool abuts cylinder head.
  • If not, adjust camshafts as follows:
        • Ensure inlet camshaft lobe positioned as shown [2] .
        • Hold camshafts with spanner on hexagon [6] .
        • Slacken camshaft sprocket bolts [7] & [8] .
        • Ensure camshaft sprockets turn freely but do not tilt.
        • If necessary, adjust position of inlet camshaft.
        • Install camshaft alignment/locking tool on inlet camshaft [4] .
        • Ensure camshaft alignment/locking tool abuts cylinder head.
        • Hold inlet camshaft with spanner on hexagon [6] .
        • Tighten inlet camshaft sprocket bolt [8] . Tightening torque: 20 Nm + 50°.

    NOTE: Camshaft sprocket bolt MUST only be used once.

        • Remove camshaft alignment/locking tool.
        • Ensure exhaust camshaft lobe positioned as shown [3] .
        • If necessary, adjust position of exhaust camshaft.
        • Install camshaft alignment/locking tool on exhaust camshaft [5] .
        • Ensure camshaft alignment/locking tool abuts cylinder head.
        • Hold exhaust camshaft with spanner on hexagon [6] .
        • Tighten exhaust camshaft sprocket bolt [7] . Tightening torque: 20 Nm + 50°.

    NOTE: Camshaft sprocket bolt MUST only be used once.

      • Remove camshaft alignment/locking tool.
  • Remove flywheel timing pin.
  • 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 [9] .
      • Slacken oil pressure relief bolt [10] .
      • Turn inlet camshaft slowly clockwise to compress the upper timing chain tensioner.
      • Camshaft rotation possible using spanner on hexagon [6] .
      • 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] .
      • Tighten oil pressure relief bolt [10] .
  • Fit new crankshaft pulley bolts. Tightening torque: 40 Nm + 60° + 60°.

NOTE: Camshafts can be fitted without valves contacting pistons when crankshaft is set at 45° BTDC on No.1 cylinder.

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