Valve Stem Seals, With Cylinder Head Removed

Special tools and workshop equipment required 

• Valve Seal Removal Tool3364
• Valve Stem Seal Driver3365
• Valve Cotters Asm/Dis-Asm Device VAS 5161
• Engine and Transmission HolderVAS 6095
• Cylinder Head Tension DeviceVAS 6419

Procedure

-- Camshafts, removing, refer to CAMSHAFTS .

-- Mark the allocation of the roller rocker lever and the hydraulic adjusting elements so they can be installed again.

-- If necessary, remove the roller rocker levers with the hydraulic adjusting elements and place them on a clean surface.

-- Mount the VAS 6419 into the VAS 6095.

Fig 1: Placing Cylinder Head On Cylinder Head Tensioning Device VAS6419

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-- Tension the cylinder head on the cylinder head tensioning device, as illustrated.

-- Connect the cylinder head tensioning device to the compressed air.

-- Slide the air cushion with the lever -arrow- under the combustion chamber onto the valve stem seal that will be removed.

-- Let enough compressed air flow into the air cushion until it contacts the valve plate.

-- Position the driftVAS 5161/3 on the valve spring plate and loosen the stuck valve keepers with a plastic mallet.

Fig 2: Identifying Special Tool - Drift VAS 5161/3

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-- Position guide plateVAS 5161/19B on cylinder head.

Fig 3: Identifying Guide Plate VAS 5161/19B Positioned On Cylinder Head

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-- Secure the guide plate with the knurled screwsVAS 5161/12.

-- Install engaging deviceVAS 5161/6 with installation forkVAS 5161/5 in guide plate.

Fig 4: Identifying Engaging Device VAS 5161/6, Installation Fork VAS 5161/5 And Guide Plate, Removal/Installation

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-- Slide installation cartridgeVAS 5161/8 in guide plate.

-- Engage pressure forkVAS 5161/2 on engaging device and press installation cartridge down.

-- At the same time, rotate installation cartridge knurled screw right until points engage in valve keeper.

-- Move the knurled wheel left and right slightly. This presses the valve keepers apart and captures them in the installation cartridge.

-- Release pressure fork.

-- Remove installation cartridge.

-- Unfasten guide plate and turn it aside.

-- Remove valve spring with valve spring plate.

-- Remove the valve stem seal with the 3364.

Fig 5: Identifying 3364

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Fig 6: Identifying Plastic Sleeve, New Valve Stem Oil Seals & Valve Stem Seal Driver 3365

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-- Lightly oil valve stem seal.

-- Slide valve shaft seal onto plastic sleeve.

-- Carefully press valve stem seal onto valve guide with 3365.

-- Remove plastic sleeve.

When the valve retainers were removed from the installation cartridge, they must be inserted in the valve keeper inserting tool next VAS 5161/18.

Fig 7: Identifying Installation Cartridge VAS 5161/8

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• The large diameter of the valve keepers point upward.

-- Press installation cartridge from above onto valve keeper inserting tool and capture keepers.

-- Insert valve spring and valve spring plate.

Fig 8: Identifying Tight End Of Spring Coils

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• Installation position: The tight spring coils -arrow- face toward the cylinder head.

-- Install the guide plate on the cylinder head.

Fig 9: Identifying Engaging Device VAS 5161/6, Installation Fork VAS 5161/5 And Guide Plate, Removal/Installation

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-- Insert installation cartridge in guide plate.

-- Press the pressure fork down and pull the knurled screw up while turn left and right. This inserts the valve retainers.

-- Release the pressure fork with the knurled screw still raised.

-- Repeat the procedure on each valve.

Assembling

Assembly is in reverse order of removal, note the following:

-- Make sure all the roller rocker levers lie on the ends of the valve stems correctly and are clipped onto the respective hydraulic adjusting elements.

-- Install camshafts, refer to CAMSHAFTS .