Version 1 BMW 1 series E81/E82/E87/E88 facelift

Version 1

Size (1) 55.2 mm

Scheme 549

Necessary preliminary tasks

1. Remove cylinder head cover . See «11 12 000 REMOVING AND INSTALLING OR SEALING CYLINDER HEAD COVER (N52K)»(ref-309607-S08264160132010032500000) .
2. For E81, E82, E87, E88, E90, E91, E92, E93: Remove «COWL PANEL COVER»(ref-309628-S19176834112009030700000) .

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

Note. Oil spray nozzle must be removed from 3rd cylinder (make a note of installation position of oil spray nozzle).

Secure special tool 11 4 270 with gripping pliers (3) to guide block (2).

Scheme 550

Secure both bearing pins (2) in torsion springs with knurled screw (1) of special tool 11 4 270.

Press special tool 11 4 270 in direction of arrow as far as it will go.

Scheme 551

Release screw (2) of torsion spring.

Tightening torque. See 11 37 2AZ in 11 37 VARIABLE VALVE GEAR .

To avoid jamming of screw (2) with torsion spring, it is necessary when releasing screw (2) to relieve the pretension on special tool 11 4 270 uniformly.

Scheme 552

Relieve tension on torsion spring (1) with special tool 11 4 270.

Note. Metal lug (2) cannot be disassembled and must not be removed.

Installation

Replace torsion spring (1) if metal lug (2) is faulty.

Scheme 553

Press torsion spring apart at positions (1).

Remove torsion spring towards top.

Scheme 554

All components must be reinstalled in the same positions in an engine which has already been in use.

Scheme 555

1. Eccentric shaft with bearing
2. Bearing caps of eccentric shaft (set out in order)
3. Inlet camshaft
4. Bearing caps of inlet camshaft (set out in order)
5. Intake valves with valve springs
6. Valve plates and valve cotters
7. Cam followers with HVCA elements (set out in order)
8. Torsion springs
9. Guide blocks (set out in order)
10. Intermediate levers (set out in order)

Release screws (1) on guide block (2).

Tightening torque. See 11 37 1AZ in 11 37 VARIABLE VALVE GEAR .

Place all guide blocks (2) in neat order in special tool 11 4 481.

Installation

Mixing up the guide blocks (2) will cause the engine to suffer idle-speed fluctuations.

This will result in maladjustment of uniform distribution.

Scheme 556

Installation

All contact surfaces (1) of guide block must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

Scheme 557

Lift out intermediate levers (2).

Place all intermediate levers (2) in neat order in special tool 11 4 481.

Installation

Mixing up the intermediate levers (2) will cause the engine to suffer idle-speed fluctuations.

Installation

All contact surfaces (1) must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

Scheme 558

All intermediate levers (1) are classified.

All intermediate levers (1) must be reinstalled in the same positions in an engine which has already been in use.

Scheme 559

Install intermediate levers (2).

Fit guide block (2) cleanly into opening.

Tighten screws (1) hand-tight.

Check that intermediate levers are in correct installation position.

Release screws (1) by a 1/4 turn.

Secure special tool 11 4 450 to bolt connection (1) of eccentric shaft.

Turn eccentric lever (3) on special tool 11 4 450 in direction of arrow.

Guide block is now pretensioned.

Insert screws (2) of guide blocks.

Tightening torque. See in 11 37 1AZ 11 37 VARIABLE VALVE GEAR .

Scheme 560

Installation

At cylinder no. 3, the guide block can be pre-installed with one screw (internal) only.

Oil spray nozzle is fitted only after torsion spring has been installed.

Install torsion spring (2) on guide block.

Installation

Insert torsion spring (2) in intermediate lever (1) (see arrow).

Check that cam follower (3) is in correct installation position.

Scheme 561

Secure special tool 11 4 270 with gripping pliers (3) to guide block (2).

Secure both bearing pins (2) in torsion springs with knurled screw (1) of special tool 11 4 270.

Press special tool 11 4 270 in direction of arrow as far as it will go.

Insert screw (2) of torsion spring.

Tightening torque. See 11 37 2AZ in 11 37 VARIABLE VALVE GEAR .

To avoid jamming of screw (2) with torsion spring, it is necessary when inserting screw (2) to increase pretension on special tool 11 4 270 uniformly.

Remove special tool 11 4 270.

At cylinder no. 3, adjust oil spray nozzle (2) so that oil spray points precisely towards spline teeth (3).

Insert screw (1) with oil spray nozzle (2) (external).

Tightening torque. See 11 37 4AZ in 11 37 VARIABLE VALVE GEAR .

Scheme 562

Assemble engine.