Valve Stem Seals, Removing And Installing, Cylinder Head Installed

Special tools and workshop equipment required 

• Spark Plug Removal Tool :3122B 
• Puller - Valve Seal :3364 
• Seal Installer - Valve Stem :3365 
• Valve Cotter Tool Kit - Adapter :T40012 
• Valve Keeper Tool Kit :VAS5161A 
• Valve Cotter Tool Kit - Guide Plate 19C :VAS5161/19C 
• Mounting Sleeve. Refer to parts information

Procedure 

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

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

-- Remove the roller rocker lever with the hydraulic lifter and place them on a clean surface.

-- Remove the spark plugs using the :3122B  .

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

-- Set the piston for the respective cylinder to "bottom dead center (BDC)".

-- Install the :T40012  in the spark plug threads.

-- Connect compressed air with at least 6 bar (87.02 psi) pressure.

-- Loosen stuck valve retainers using a :VAS5161/3A  and a plastic hammer.

Intake Side: 

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

Exhaust Side: 

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

Continuation: 

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

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

-- 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 the valve stem seals using :3364  .

-- If the :3364  cannot be used because there is not enough space, drive the spring pin -arrow- out using a drift and remove the impact attachment.

-- Position the lower section of the :3364  on the valve stem seal.

-- Place the drift -1- in the hole in the lower section of the removal tool.

-- Position the extractor lever on the puller and remove the valve stem seal -arrow-.

• In order not to damage the valve stem seal -4- during installation, mount the Mounting Sleeve -3- on the valve stem -2-.

-- Lightly oil the valve stem seal sealing lip.

-- Insert the valve stem seal in the :3365  and carefully press on over the Mounting Sleeve on the valve guide -1- all the way.

-- Remove the Mounting Sleeve.

-- Insert the valve spring and valve spring retainer.

-- Connect the :VAS5161A  as illustrated.

Continuation: 

• If the valve retainers were removed from the assembly cartridge, they must then be inserted into the :VAS5161/18  .
• Press the :VAS5161/8A  onto the insertion tool from above.

-- 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  .

-- Repeat the procedure on each valve.

Assembling 

Assemble in the reverse order of removal. Note the following:

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

-- Install the spark plugs. Refer to OVERVIEW - IGNITION SYSTEM .