LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1651 (Engine - Repair) >> 37 Variable Valve Gear >> 11 37 005 Removing and installing/replacing eccentric shaft (N52K)

11 37 005 Removing and installing/replacing eccentric shaft (N52K)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 528xi, 2010 BMW 528i, 2009 BMW 528xi, 2009 BMW 528i, and 2008 BMW 528xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

Necessary preliminary tasks: 

If necessary, move eccentric shaft (1) on twin surface to minimum lift (2).

Fig 1: Identifying Eccentric Shaft And Lift
G04751039Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: All bearing caps (1 and 2) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder).
Bearing cap 6 (1) is provided with a stop.

Release screws on bearing cap 6 (1).

Release screws on bearing caps 1 to 5 (2).

Set all bearing caps down in special tool 11 4 481  in a tidy and orderly fashion.

Remove eccentric shaft with gentle tilting and turning movements.

Fig 2: Identifying Bearing Caps
G04751222Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Screw is not magnetic and must be secured against falling down.

Release screw.

Remove magnet wheel (1).

Fig 3: Identifying Magnet Wheel
G04740220Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Magnet wheel (1) is highly magnetic and must be protected against metal filings/borings.

After removing, place magnet wheel (1) in a plastic bag (2) with a seal.

Fig 4: Placing Magnet Wheel In Plastic Bag
G04751038Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Needle bearing (1) can break very easily.

Carefully pull needle bearing (1) apart at point of separation.

Remove all needle bearings (1) from eccentric shaft.

Fig 5: Identifying Needle Bearings
G04740221Courtesy of BMW OF NORTH AMERICA, INC.

Install bearing shells (1) as pictured.

NOTE: Always replace bearing shells (1) and needle bearings together.
Fig 6: Identifying Bearing Shells
G04740226Courtesy of BMW OF NORTH AMERICA, INC.

Install bearing shell (1) with tip facing down (see arrow) in cylinder head.

Install bearing shell (2) with tip facing up in bearing cap.

Fig 7: Identifying Bearing Shells
G04751227Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: All bearing caps (1 and 2) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder).
Bearing cap 6 (1) is provided with a stop.

Insert eccentric shaft.

Adjust eccentric shaft on dihedron to minimum stroke.

Fit all bearing caps (1 and 2).

Insert all screws.

Tightening torque 11 12 7AZ .

Fig 8: Identifying Bearing Caps
G04751222Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.