How to Replace timing chain on BMW 325i E90 91 92 2005-2007

Special tools

• Camshaft alignment tool 1 – BMW No.11 4 281.
• Camshaft alignment tool 2 – BMW No.11 4 282.
• Camshaft alignment tool 3 – BMW No.11 4 283.
• Flywheel timing pin – BMW No.11 0 300.
• Sensor gear alignment tool – BMW No.11 4 290.
• 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.

  NOTE: Refer to Autodata Technical Data for tightening torques.

  NOTE: Refer to Technical Data module for tightening torques.

• Engine at TDC on No.1 cylinder.
• Ensure part number on each camshaft is facing upwards [1] .
• Remove blanking plug from cylinder block.
• Insert flywheel timing pin [2] . Tool No.11 0 300.

NOTE: Engine should not turn if flywheel timing pin fitted correctly.

• Ensure camshaft alignment tools can be fitted [3] , [4] & [5] . Tool Nos.11 4 281/11 4 282/11 4 283.
• If not, adjust camshafts as follows:
  • Slacken central bolt on each camshaft adjuster [6] .
  • Remove tensioner assembly [7] .

  NOTE: If chain tensioner is to be re-used it must be drained of oil. Compress plunger slowly twice.

  • Ensure sensor gear locating holes at 9 o’clock position [8] .
  • Install sensor gear alignment tool and secure to cylinder head [9] . Tool No.11 4 290.
  • Install timing chain pre-tensioning tool [10] . Tool No.11 9 340.
  • Screw in adjusting screw until in contact with guide rail.
  • Pre-load timing chain with tensioning tool to 0,6 Nm [10] .
  • Tighten central bolt on each camshaft adjuster [6] . Tightening torque: 20 Nm + 180°.

  NOTE: Central bolt of camshaft adjusters MUST only be used once.

• Remove flywheel timing pin [2] .
• Remove sensor gear alignment tool [9] .
• Remove camshaft alignment tools [3] , [4] & [5] .
• Remove timing chain pre-tensioning tool [10] .
• Install tensioner assembly [7] . Tightening torque: 50 Nm.
• Turn crankshaft two turns clockwise.
• Ensure flywheel timing pin and camshaft alignment tools can be refitted [3] , [4] , [5] & [9] .

NOTE: Crankshaft pulley central bolt MUST only be used once.