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 for the valve stem seal with a single sealing lip. Refer to Figure.
- Fitting Tool: T40376/1 for the valve stem seal with a double sealing lip. Refer to Figure.
- Valve Keeper Tool Kit: VAS5161A with Guide Plate: VAS5161/19C
- Valve Cotter Tool Kit - Adapter: T40012
- Assembly Tool: T40452
Procedure
-- Remove the camshafts. Refer to CAMSHAFT, REMOVING AND INSTALLING .
-- Remove the spark plugs using the Spark Plug Removal Tool: 3122B .
Guide Plate, Reworking:
-- Check if the opening -arrow- is present.
-- If necessary, rework the Guide Plate: VAS5161/19C -arrow- until the guide plate touches the cylinder head and the guide pin -1- is free.
Continuation:
-- Fasten the Guide Plate: VAS5161/19C on the cylinder head as shown using the Knurled Thumb Screws M6: VAS5161/12 .
-- Set the piston for the respective cylinder to "bottom dead center (BDC)".
-- Install the Valve Cotter Tool Kit - Adapter: T40012 in the spark plug threads.
-- Connect compressed air with at least 6 bar pressure.
-- Loosen stuck valve retainers using a Punch: VAS5161/3A and a plastic hammer.
Intake Side:
-- Install the Retainer: VAS5161/6 with the Guide Forks: VAS5161/5 in the center threads of the Guide Plate: VAS5161/19C .
Exhaust Side:
-- Install the Retainer: VAS5161/6 with the Guide Forks: VAS5161/5 in the outer threads on the Guide Plate: VAS5161/19C .
Continuation:
-- Insert the Assembly Cartridge: VAS5161/8A into the Guide Plate: VAS5161/19C .
-- Engage the Pressure Fork With Lever for Assembly Cartridge: VAS5161/2 on the Retainer: VAS5161/6 .
-- Press down the Valve Cotter Tool Kit - Assembly Cartridge: VAS5161/8A and at the same time turn the knurled thumb screw on the Valve Cotter Tool Kit - Assembly Cartridge: VAS5161/8A to the right until the points engage in the valve keepers.
-- Move the knurled thumb screw back and forth slightly. This presses the valve retainers apart and captures them in the installation cartridge.
-- Release the Pressure Fork With Lever For Assembly Cartridge: VAS5161/2 .
-- Remove the Assembly Cartridge: VAS5161/8A .
-- Remove the valve stem seals using the Puller - Valve Seal: 3364 .
- In order not to damage the valve stem seal -4- during installation, mount the Assembly Tool: T40452 -3- on the valve stem -2-.
-- Lightly oil the valve stem seal sealing lip.
-- Insert the valve stem seal into the seal installer -5- and carefully press it all the way onto the valve guide -1- over the Mounting Sleeve.
-- Remove the Assembly Tool.
-- Insert the valve spring and valve spring retainer.
-- Install the Valve Keeper Tool Kit: VAS5161A as shown.
Intake Side:
Exhaust Side:
Continuation:
- If the valve keepers were removed from the assembly cartridge, they must then be inserted into the Valve Insertion Device: VAS5161/18 .
- Press the Valve Cotter Tool Kit - Assembly Cartridge: VAS5161/8A onto the insertion tool from above.
-- Press the Valve Keeper Tool Kit Assembly Cartridge: VAS5161/8 down with the Valve Keeper Tool Kit Pressure Fork with Lever for Assembly Cartridge: VAS5161/2 and rotate the cartridge knurled thumb screw back and forth while pulling up.
-- Release the Pressure Fork with Lever for Assembly Cartridge: VAS5161/2 with the knurled thumb screw pulled.
-- Remove the Valve Keeper Tool Kit: 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 .