Valve Stem Seals With Cylinder Hear Removed, Replacing
Special tools and workshop equipment required
- Puller - Valve Seal 3364
- Seal Installer - Valve Stem 3365
- Valve Cotter Tool Kit VAS5161A with Valve Cotter Tool Kit - Guide Plate 19C VAS5161/19C
- Engine and Gearbox Bracket VAS6095A VAS6095A
- Cylinder Head Tensioning Device VAS6419
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 Cylinder Head Tensioning Device VAS6419 in the Engine and Gearbox Bracket VAS6095A.
-- 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 chambers 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 Valve Cotter Tool Kit - Punch VAS5161/3A on the valve spring plate and loosen the stuck valve retainers with a plastic mallet.
-- Place Valve Cotter Tool Kit - Guide Plate VAS5161/19C from Valve Cotter Tool Kit VAS5161 on the cylinder head.
-- Secure the guide plate with the Valve Cotter Tool Kit - Knurled Thumb Screws VAS5161/12.
-- Install the Valve Cotter Tool Kit - Retainer VAS5161/6 with the Valve Cotter Tool Kit - Guide Forks M6/M8 with Threaded Studs VAS5161/5 in the guide plate.
-- Push the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A into guide plate.
-- Engage the Valve Cotter Tool Kit - Pressure Fork 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.
-- Remove the valve spring and the valve spring plate.
-- Remove the valve stem seal with the Puller - Valve Seal 3364.
Risk of damage when installing valve stem seals.
- Place the plastic sleeve -A- that is attached to valve stem seals -B- on valve stem.
-- 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 Seal Installer - Valve Stem 3365.
-- Remove plastic sleeve.
If the valve retainers were removed from the installation cartridge, they must be inserted into the Valve Cotter Tool Kit - Valve Insertion Device VAS5161/18 first.
- The large diameter of the valve retainers point upward.
-- Press assembly cartridge from above onto valve insertion device and capture retainers.
-- Insert valve spring and valve spring plate.
- Installed position, valve spring. Refer to Figure.
-- Attach the Valve Cotter Tool Kit - Guide Plate 19C 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 turning 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
Assemble in reverse order of disassembling. 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 the camshafts. Refer to CAMSHAFT, REMOVING AND INSTALLING .