11 34 560 Replacing All Valve Stem Seals (N55)

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Special Tools Required:

11 1 480 .
11 6 380 .

Necessary Preliminary Tasks:

Remove CYLINDER HEAD .
Remove INTERMEDIATE LEVER .
Remove ECCENTRIC SHAFT .
Remove INTAKE CAMSHAFT .
Remove EXHAUST CAMSHAFT .
Remove ROCKER ARMS .

Firmly Press Special Tool 11 1 480 Onto Old Valve Stem Seals.

Detach Valve Stem Seal From Valve Stem By Turning and Simultaneously Pulling Special Tool 11 1 480 .

Installation:

Insert All VALVES .

Fig 1: Pressing Special Tool 11 1 480 Onto Old Valve Stem Seals

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: for Use On The N55 Engine, Special Tool 11 6 380 Must Be Re-Machined According To The Picture with A 10 Mm Dia. Drill Bit To A Depth of B = Approx. 23 Mm.

This Modification Has Already Been Taken Into Account for Reordering.

Fig 2: Identifying Re-Machining Dimensions for Special Tool 11 6 380

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Different Diameters At Valve Stem.
All Valve Stem Seals Are Color-Coded.

for 5 Mm Dia. Valves, The Valve Stem Seal Is Marked Red or Brown.

for 6 Mm Dia. Valves, The Valve Stem Seal Is Marked Green.

Fig 3: Identifying 5Mm and 6Mm Valve Stem Seals

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Fit The Assembly Sleeves (Plastic Sleeves) Contained In The Delivery Specification On The Valve Stem End.

Lubricate Assembly Sleeve.

Press On Valve Stem Seal By Hand with Special Tool 11 6 380 As Far As It Will Go.

NOTE: Graphic Shows Engine N42.

Fig 4: Pressing On Valve Stem Seal Using Special Tool 11 6 380

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble Engine.