LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1510 (Engine - Repair Instructions (N62)) >> 34 Valves With Springs >> 11 34 715 Replacing All Valve Springs (N62)

11 34 715 Replacing All Valve Springs (N62)

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

Special tools required: 

cylinder head removed)

Preliminary tasks are described in Disassembling and assembling cylinder head.  See 11 12 503 DISASSEMBLING AND ASSEMBLING CYLINDER HEAD (N62/N62TU) .

Remove bearing bracket (1) with inlet camshaft and stow in special tool 11 9 470.  The procedure is described in 11 31 032 REMOVING AND INSTALLING/REPLACING LEFT INLET CAMSHAFT (N62 TO 9/03)  or 11 31 034 REMOVING AND INSTALLING/REPLACING RIGHT INLET CAMSHAFT (N62 FROM 9/03 AND N62TU) .

Fig 1: Identifying Bearing Bracket
G04739802Courtesy of BMW OF NORTH AMERICA, INC.

Remove exhaust camshaft.

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

Fig 2: Identifying Camshaft Lobe
G04777406Courtesy of BMW OF NORTH AMERICA, INC.

Press down valve spring on spring cap, top, and remove valve keys.

Fig 3: Pressing Down Valve Spring On Spring Cap
G04777541Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Incorrect installation possible.
Valve springs of exhaust and inlet camshafts are different. Incorrect installation will result in engine damage.
NOTE: Valve springs for exhaust valves are approx. 4 mm longer.
  1. Valve springs of inlet valves
  2. Valve springs of exhaust valves
    Fig 4: Identifying Valve Springs Of Inlet And Exhaust Valves
    G04740094Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Incorrect installation possible.
Incorrect installation will result in valve spring breakage.
The color coding (1) is normally located on the lower end of the valve spring.
Only the diameter is decisive for the correct installation of the valve springs.
Install valve spring so that larger diameter points to spring plate at bottom.
Fig 5: Identifying Valve Spring Diameter And Color Marking
G04740095Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

  1. Valve
  2. Valve stem seal with spring plate, bottom
  3. Valve spring
  4. Top plate spring
  5. Valve tapers
    Fig 6: Identifying Valve Assembly Components
    G04740096Courtesy of BMW OF NORTH AMERICA, INC.
scientia non olet · About LEMON Manuals