Valve Shaft Seals, Removing And Installing, Cylinder Head Removed

Special tools and workshop equipment required 

• Puller - Valve Seal :3364 
• Seal Installer - Valve Stem :3365 
• Valve Cotter Tool Kit :VAS5161A 
• Valve Cotter Tool Kit - Guide Plate 19B :VAS5161/19B 
• Engine and Transmission Holder :VAS6095 
• Cylinder Head Tensioning Device :VAS6419 

Mandatory Replacement Parts 

• Seals - Valve stem

Procedure 

-- Remove the camshafts. Refer to CAMSHAFT, REMOVING AND INSTALLING .

-- 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.

-- Insert the :VAS6419  in the :VAS6095  .

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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.

-- Tighten the :VAS5161/19B  on the cylinder head as shown using the :VAS5161A/12  .

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-- Insert the :VAS5161/3  in the guide plate and loosen the stuck valve retainers with a plastic mallet.

For the Intake Side 

-- Install the :VAS5161/6  with the :VAS5161/5  in the center threads of the :VAS5161A/19B  .

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-- Insert the :VAS5161/8A  into the :VAS5161/19B  .

-- Engage the :VAS5161/2  on the :VAS5161/6  .

For the Exhaust Side 

-- Install the :VAS5161/6  with the :VAS5161/5  in the outer threads of the :VAS5161A/19B  .

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-- Press down the :VAS5161/8A  and at the same time turn the knurled thumb screw on the :VAS5161/8A  to the right until the points engage in the valve retainers.

-- Move the knurled thumb screw back and forth slightly. This presses the valve retainers apart and captures them in the installation cartridge.

-- Release the :VAS5161/2  .

-- Remove the :VAS5161/8A  .

-- Remove valve stem seals using :3364  .

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Install Valve Stem Seals 

-- Lightly oil the valve stem seal.

-- Slide the valve stem seal onto the plastic sleeve.

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

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-- Remove plastic sleeve.

-- Insert the valve spring and valve spring plate.

-- Install the :VAS5161A  as illustrated.

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-- Press the :VAS5161/8  down with the :VAS5161/2  and rotate the cartridge knurled thumb screw back and forth while pulling up.

-- Release the :VAS5161/2  with the knurled thumb screw pulled.

-- Remove the :VAS5161A  .

Assemble in reverse order of disassembly. Note the following:

-- Install the camshafts. Refer to CAMSHAFT, REMOVING AND INSTALLING .