Valve Stem Seals, Removing And Installing, Cylinder Head Installed: Procedure
-- Remove the camshaft housing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .
-- Remove the spark plugs with the :3122B .
-- Remove the :T10340 .
-- Set the piston for the respective cylinder to "bottom dead center (BDC)".
-- Position the :VAS5161/32-1 on the cylinder head and tighten using the :VAS5161/12 .
-- Install the :T40012 with seal in the spark plug thread and tighten by hand.
-- Connect the adapter to the compressed air using a commercially available intermediate piece and give steady pressure.
- Minimum pressure: 6 bar (87.02 psi)
-- Insert the :VAS5161/3A into the guide plate and loosen the stuck valve retainers with a plastic mallet.
-- Install the :VAS5161/6 with the :VAS5161/5 in the guide plate.
-- Insert the :VAS5161/32-2 with the :VAS5161A/32-3 installed into the guide plate.
-- Engage the :VAS5161/2 at the engaging device and press the installation cartridge downward.
-- At the same time, turn the installation cartridge knurled bolt right until points engage in the valve retainers.
-- Move the knurled bolt left and right slightly. This presses the valve retainers apart and captures them in the assembly cartridge.
-- Release the pressure fork.
-- Remove the assembly cartridge.
-- Remove the guide plate and turn it aside.
- The pressurized air hose remains connected.
-- Remove the valve spring and the valve spring retainer.
-- Remove the valve stem seal using the :VAS6770 .
There is a risk of damage when installing valve stem seals.
-- Lightly lubricate the valve stem seal sealing lip -A-.
-- Carefully press the valve stem seal -A- onto the valve guide with the :3365 .
If the valve retainers were removed from the installation cartridge, they must be inserted in the valve insertion device next.
- The large diameter of the valve retainers point upward.
-- Press the cartridge from above onto the insertion device and valve retainers.
-- Install the valve spring and valve spring retainer, valve spring installed position. Refer to Installed Position Of Valve Spring .
-- Fasten the :VAS5161/32-1 to the cylinder head again.
-- Insert the :VAS5161/32-2 with the :VAS5161A/32-3 into the guide plate.
-- Press the pressure fork down and pull the knurled bolt up while turning left and right. This inserts the valve retainers.
-- Release the pressure fork with the knurled bolt still raised.
-- Repeat the procedure on each valve.
Assembling
Assemble in the reverse order of removal. Note the following:
-- Install the spark plugs.
-- Install the camshaft housing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .