Valve Stem Seals, Removing And Installing, Cylinder Head Installed: Notes
Special tools and workshop equipment required
- Spark Plug Removal Tool :3122B
- Puller - Valve Seal :3364
- Seal Installer - Valve Stem :3365
- Valve Keeper Tool Kit :VAS5161A with Valve Cotter Tool Kit - Guide Plate 19c :VAS5161/19C or as an alternative Valve Cotter Tool Kit - Guide Plate 19B :VAS5161/19B
- Valve Cotter Tool Kit - Punch :VAS5161/3
- Valve Cotter Tool Kit - Knurled Thumb Screws :VAS5161/12
- Valve Keeper Tool Kit - Pressure Fork :VAS5161/2
- Guide Forks M6/M8 with Valve Cotter Tool Kit - Threaded Studs :VAS5161/5
- Valve Cotter Tool Kit - Retainer :VAS5161/6
- Valve Cotter Tool Kit - Assembly Cartridge :VAS5161/8
- Valve Keeper Tool Kit - Valve Insertion Device :VAS5161/18
- Valve Cotter Tool Kit - Adapter :T40012
- Mounting Sleeve.
Reworking the :VAS5161/19C :
In place of the :VAS5161/19C , the :VAS5161/19B may also be used. To do this, the following reworking must be completed as follows:
-- Lengthen the long opening to 2 mm as shown in the illustration.
For this application, the guide plate is only attached to the cylinder head with a knurled bolt.
-- Remove all of the left and right 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.
-- Remove spark plugs with :3122B .
-- Set the piston for the respective cylinder to "bottom dead center (BDC)".
-- Position the : VAS5161/3 on the valve spring plate and loosen the stuck valve retainers with a plastic mallet.
-- Place the : VAS5161/19C on the cylinder head.
-- Secure the guide plate with the : VAS5161/12 .
-- Install the :T40012 with sealing ring 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 psi) positive pressure.
-- Install the : VAS5161/6 with the :VAS5161/5 in the guide plate.
-- Push :VAS5161/8 into guide plate.
-- Engage the :VAS5161/2 at the engaging device and press the installation cartridge downward.
-- At the same time, rotate the cartridge knurled screw right until points engage in valve retainers.
-- Move the knurled wheel left and right slightly. This presses the valve retainers apart and captures them in the cartridge.
-- Release the pressure fork.
-- Remove the cartridge.
-- Unfasten guide plate and turn it aside.
- Pressurized air hose remains connected.
-- Remove the valve spring and the valve spring plate.
-- Remove the valve stem seal with the :3364 .
If the :3364 cannot be used on some valve stem seals due to restricted clearance, proceed as follows.
-- Drive out the roll pin in direction of -arrow- on the puller with a drift and remove the impact puller attachment.
-- Position the lower part of the :3364 on the valve stem seal.
-- Secure the puller with a drift or cotter pin drive -1- as shown in the illustration.
-- Position the valve 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.
-- Insert the valve stem seal in the :3365 and carefully press on over the Mounting Sleeve on the valve guide -1- all the way.
-- Carefully press the valve stem seal onto the valve guide with the :3365 .
-- Remove the Mounting Sleeve.
If the valve retainers were removed from the installation cartridge, they must then be inserted into the :VAS5161/18 .
- The large diameter of the valve retainers point upward.
-- Press the cartridge from above onto the insertion device and capture retainers.
-- Insert the valve spring and the valve spring plate, for allocation refer to 32.
-- Attach the :VAS5161/19C onto the cylinder head again.
-- 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.