Valve Stem Seals, Cylinder Head Installed
Special tools and workshop equipment required
- Puller - Valve Seal 3364
- Seal Installer - Valve Stem 3365
- Torque Wrench 1331 5-50Nm VAG1331
- Valve Cotter Tool Kit VAS5161A
- Valve Cotter Tool Kit - Guide Plate 23 VAS5161/23
- Valve Cotter Tool Kit - Guide Plate 23 - Guide Plate Sleeve VAS5161/23-1
Removing
-- Remove the glow plugs. Refer to GLOW PLUGS .
-- Remove the camshafts. Refer to CAMSHAFTS .
-- Position the Valve Cotter Tool Kit - Guide Plate 23 VAS5161/23 on the cylinder head.
-- Secure the Valve Cotter Tool Kit - Guide Plate 23 VAS5161/23 to the intake manifold side using a Valve Cotter Tool Kit - Knurled Screw VAS5161/12 and on the studs using collarless M6 nuts -1- tightened by hand.
-- Install the Valve Cotter Tool Kit - Compression Stud VAS5161/10 in the Valve Cotter Tool Kit - Guide Plate 23 VAS5161/23.
-- Install the Valve Cotter Tool Kit - Adapter for Compressed Air Connection VAS5161/11 into the respective glow plug threads and tighten by hand.
-- Insert the Valve Cotter Tool Kit - Punch VAS5161/3A into the Valve Cotter Tool Kit - Guide Plate 23 VAS5161/23 and loosen the valve retainers using a plastic mallet.
-- Install the Valve Cotter Tool Kit Guide Forks M6/M8 with Threaded Studs VAS5161/5 in the Valve Cotter Tool Kit - Guide Plate 23 VAS5161/23 with the Valve Cotter Tool Kit - Retainer VAS5161/6.
-- Push the Valve Cotter Tool Kit - Guide Plate 23 - Guide Plate Sleeve VAS5161/23-1 onto the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A.
-- Connect the Valve Cotter Tool Kit - Adapter for Compressed Air Connection VAS5161/11 to compressed air with a commercially available connector and apply a constant pressure.
- Minimum pressure: 6 bar (87.0 psi)
-- Engage the Valve Cotter Tool Kit - Pressure Fork with Lever for Assembly Cartridge VAS5161/2 at the Valve Cotter Tool Kit - Retainer VAS5161/6 and press down the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A.
-- At the same time, turn the knurled thumb screw on the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A clockwise until the points engage in the valve retainers.
-- Lightly move the knurled thumb screw back and forth, this causes the valve retainers to be pressed apart and captured in the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A.
-- Release the Valve Cotter Tool Kit - Pressure Fork with Lever for Assembly Cartridge VAS5161/2.
-- Remove the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A with the Valve Cotter Tool Kit - Guide Plate 23 - Guide Plate Sleeve VAS5161/23-1, the valve plate and the valve spring.
-- Pull off the valve stem seal using the Puller - Valve Seal 3364.
The Valve Seal Removal Tool 3064 is shown, the Puller - Valve Seal 3364 is used for removing the valve stem seals.
Installing
A plastic sleeve -A- is supplied with the new valve stem seal -B-.
-- Place the plastic sleeve -A- on the valve stem to prevent damage to the new valve stem seal -B-.
-- Lightly coat the valve stem seal lips -B- with oil.
-- Slide the valve stem seal -B- onto the plastic sleeve -A-.
-- Carefully press the valve stem seal onto the valve guide using the Seal Installer - Valve Stem 3365.
-- Tap lightly on the driver with a plastic mallet until the valve stem seal is at the stop.
-- Remove the plastic sleeve again -A-.
-- Insert the valve spring and valve plate in the cylinder head.
-- If the valve retainers were removed from the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A, they must then be inserted into the Valve Cotter Tool Kit - Valve Insertion Device VAS5161/18.
The large diameter of the valve retainers point upward.
-- Press the Valve Cotter Tool Kit - Assembly Cartridge VAS5161/8A onto the Valve Cotter Tool Kit - Valve Insertion Device VAS5161/18 from above and take up the valve retainers.
-- Insert the Valve Cotter Tool Kit - Valve Insertion Device VAS5161/18 into the Valve Cotter Tool Kit - Guide Plate 23 VAS5161/23.
-- Press the Valve Cotter Tool Kit - Pressure Fork with Lever for Assembly Cartridge VAS5161/2 down and pull the knurled thumb screw upward while turning it left and right to insert the valve retainers.
-- Release the Valve Cotter Tool Kit - Pressure Fork with Lever for Assembly Cartridge VAS5161/2 with the knurled thumb screw still pulled.
The rest of the installation is performed in reverse order of removal, noting the following:
-- Install the camshafts. Refer to CAMSHAFTS .
After installing the camshafts, the engine may not be started for approximately 30 minutes. The hydraulic lash adjusters must seat themselves (otherwise the valves will crash into the pistons).
After working on the valvetrain, carefully rotate the engine by hand at least two full revolutions to ensure that the valves do not strike the pistons when starting.
-- Install the glow plugs. Refer to GLOW PLUGS .