BMW X5: Valves With Springs

REMOVING AND INSTALLING/REPLACING ALL VALVES (N62) (CYLINDER HEAD REMOVED)

Preliminary tasks are described in DISASSEMBLING AND ASSEMBLING CYLINDER HEAD.

Remove valve springs.

Remove valve stem seals.

Remove valves from cylinder head.

Installation:

If necessary, check valve guide for wear.

If necessary, remachine valve seat.

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. 487: Identifying Valve Springs Of Inlet And Exhaust Valves

IMPORTANT: Incorrect installation possible.

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

Fig. 488: Identifying Color Marking Of Valve Spring

Arrangement:

1. Valve
2. Valve stem seal with spring plate, bottom
3. Valve spring
4. Top plate spring
5. Valve tapers

Fig. 489: Identifying Valve Stem Seal With Spring Plate And Top Plate Spring

REPLACING ALL VALVE STEM SEALS (N62)

Special tools required:

• 11 1 380
• 11 6 370
• 11 6 380

Preliminary tasks are described in DISASSEMBLING AND ASSEMBLING CYLINDER HEAD.

Press special tool 11 6 370 onto valve stem seal.

Withdraw valve stem seal by turning and simultaneously unscrewing special tool 11 6 370.

Fig. 490: Identifying Special Tool (11 6 370)

Installation:

Lubricate valve stem with oil and insert valve.

Fit special tool 11 1 380.

Coat new valve stem seal (1) with oil and install.

Fig. 491: Identifying Special Tool (11 1 380)

NOTE: For use on the N62 engine, special tool 11 6 380 must be remachined in accordance with the illustration with a 6.2 mm dia. drill bit to a depth of A = approx. 45 mm.

This modification has already been taken into account for reordering.

Fig. 492: Identifying Special Tool (11 6 380)

Press on valve stem seal with special tool 11 6 380 by hand as far as it will go.

Fig. 493: Identifying Special Tool (11 6 380)

REPLACING ALL VALVE SPRINGS (N62TU)

Special tools required:

• 11 0 346
• 11 9 470

(cylinder head removed)

Preliminary tasks are described in DISASSEMBLING AND ASSEMBLING CYLINDER HEAD.

Remove bearing bracket (1) with inlet camshaft and stow in special tool 11 9 470.

Fig. 494: Identifying Special Tool (11 9 470) And (11 9 473)

Remove exhaust camshaft.

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

Fig. 495: Identifying Special Tool (11 0 346)

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

Fig. 496: Removing Valve Keys

IMPORTANT: Incorrect installation possible.

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

Fig. 497: Identifying Color Marking Of Valve Spring

Arrangement:

1. Valve
2. Valve stem seal with spring plate, bottom
3. Valve spring
4. Top plate spring
5. Valve tapers

Fig. 498: Identifying Valve Stem Seal With Spring Plate And Top Plate Spring

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