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How to Replace timing chain on BMW 320d E46

Special tools

  • Camshaft alignment/locking tool – BMW No.11 6 320.
  • Flywheel locking tool – BMW No.11 8 010 (AT version GM-5).
  • Flywheel locking tool – BMW No.11 8 182/11 8 183 (AT version 6HP-19).
  • Flywheel locking tool – BMW No.11 8 182/11 8 183/11 8 185 (MT version H).
  • 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.

Valve timing procedures

How to Replace timing chain on BMW 320d E46
How to Replace timing chain on BMW 320d E46
  • Removal/installation of timing chain requires:
      • 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:
        • Hold camshafts with spanner on hexagon [6] .
        • Slacken camshaft sprocket bolts [7] & [8] .
        • Ensure camshaft sprockets turn freely but do not tilt.
        • Ensure inlet camshaft lobe positioned as shown [2] .
        • 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 bolt. Tightening torque: 100 Nm + 60° + 60° + 30°.

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

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