11 31 051 Replacing timing chain (S62)

Remove engine.

Remove both cylinder heads. Refer to 11 12 517 REMOVING AND INSTALLING BOTH CYLINDER HEADS (S62) .

• Remove alternator
• Remove vibration damper
• Remove water pump
• Remove lower oil sump section
• Remove oil circuit changeover valves
• Remove oil pump
• Remove upper oil sump section

Remove lower timing case cover, refer to 11 14 110 REMOVING AND INSTALLING LOWER TIMING CASE COVER (S62) .

Removal 

Removal of timing chain is described separately from installation.

Open plastic straps (1).

Remove timing chain.

Fig 1: Removing Timing Chain

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, remove guide, reversing and tensioning rails, check and replace.

If necessary, remove tensioning rail:

Release retaining screw on tensioning rail.

Remove tensioning rail with oil guide.

Fig 2: Removing Tensioning Rail With Oil Guide

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, remove guide rail:

Using a small screwdriver, carefully push back retaining lug on guide rail and detach guide rail.

Fig 3: Pushing Back Retaining Lug On Guide Rail

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, remove reversing rail:

Release retaining screws (1 and 2) on reversing rail and remove reversing rail.

Fig 4: Removing Reversing Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Installation 

Installation of timing chain is described separately from removal.

Fig 5: Locating Components

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1. Insert throttle ring (1) in reversing rail
2. Replace O-ring (2) and insert in reversing rail
3. Replace O-ring (3)

Coat O-ring (3) with oil as lubricant.

Fig 6: Installing Reversing Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Install reversing rail, insert screws (1 and 2) and tighten down.

Tightening Torque for screws (1 and 2), 14 Nm.

Slide guide rail over guide pin until retaining lug can be heard to snap into place on lower guide pin.

Fig 7: Sliding Guide Rail Over Guide Pin

Courtesy of BMW OF NORTH AMERICA, INC.

Replace O-ring (1) and coat with oil as lubricant.

Install oil guide for bow cover in the pivot rail.

Fig 8: Installing Oil Guide

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screw of tensioning rail and tighten down.

Fig 9: Inserting Screw Of Tensioning Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Insert timing chain over crankshaft sprocket wheel and reversing rail.

Fig 10: Inserting Timing Chain

Courtesy of BMW OF NORTH AMERICA, INC.

Align timing chain to guide rail.

Press bow cover against the timing chain. Secure tensioning rail and timing chain with a plastic strap (1).

Install lower timing case cover, refer to 11 14 110 REMOVING AND INSTALLING LOWER TIMING CASE COVER (S62) .

• Install upper oil sump section
• Install oil pump
• Install oil circuit changeover valves
• Install lower oil sump section
• Install water pump
• Install vibration damper
• Install alternator

Assemble engine.