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Home >> BMW >> 2009 >> X5 48i >> Repair and Diagnosis >> External Pages >> Different car >> Section 1317 (Engine - Repair Instructions (N73)) >> 34 Valves With Springs >> 11 34 715 Replacing All Valve Springs (N73) >> Special tools required:

Special tools required:

WARNING: This page is about a different car, the 2008 BMW 760Li and 2007 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks: 

IMPORTANT: Used rocker arms may only be reused in the same position.
Remove rocker arms of inlet camshaft and set aside in neat order.

Place bearing bracket with inlet camshaft and eccentric shaft as illustrated on special tool 11 9 470. See 11 9 470 SUPPORT

Illustrations show cylinders 7 to 12.

Fig 1: Identifying Inlet Camshaft
G04773756Courtesy of BMW OF NORTH AMERICA, INC.

Rocker arms (1) are now freely accessible.

Installation: 

Rocker arm (1) is attached with a spring clamp on hydro - element.

Before installing bearing bracket, make sure rocker arms (1) are correctly positioned.

Observe rocker arm tolerance classes as illustrated (1 to 4).

IMPORTANT: Only rocker arms of the same tolerance class may be fitted in each cylinder on the inlet side.
Fig 2: Identifying Rocker Arm
G04739799Courtesy of BMW OF NORTH AMERICA, INC.

Place cylinder head on special tool 11 9 000. See 11 9 000 CYLINDER HEAD EXPANDER TOOL

Press down special tool 11 9 014 valve spring. See 11 9 000 CYLINDER HEAD EXPANDER TOOL

Fig 3: Identifying Special Tool (11 9 000)
G04739151Courtesy of BMW OF NORTH AMERICA, INC.

Special tool 11 0 346 old version. See 11 0 340 ACCESSORIES

Align special tool 11 0 346 in direction of valve shaft. . See11 0 340 ACCESSORIES

Fig 4: Identifying Special Tool (11 0 346) On Valve Shaft
G04740102Courtesy of BMW OF NORTH AMERICA, INC.

Press down valve spring on spring cap from above and remove valve keys.

Fig 5: Removing Valve Keys
G04207672Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Valve springs of exhaust and inlet camshafts are different.
Incorrect installation is possible. 
Mixing up the valve springs will result in engine damage  .

Valve spring (1), inlet side.

Valve spring (2), exhaust side.

Valve spring (2), exhaust side, is approx. 4 mm longer.

Fig 6: Identifying Inlet And Exhaust Valve Spring
G04740094Courtesy of BMW OF NORTH AMERICA, INC.

Install valve springs so that larger diameter points to spring plate at bottom.

Only the diameter is decisive for the correct installation of the valve springs.

Color coding (1) is on lower end of valve spring.

Fig 7: Identifying Valve Springs Diameter
G04740095Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

  1. Valve
  2. Valve stem seal with spring plate, bottom
  3. Valve spring
  4. Spring plate, top
  5. Valve keys
    Fig 8: Identifying Valve Components Arrangement Sequence
    G04740096Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine in reverse sequence to its disassembly.

Installation: 

Clean all bearings and cams of inlet and exhaust camshafts and lubricate with engine oil.