Valve Stem Seals, Removing And Installing, Cylinder Head Installed
Special tools and workshop equipment required
- Spark Plug Removal Tool: 3122B
- Puller - Valve Seal: 3364
- Intake side: Seal Installer - Valve Stem: 3365
- Exhaust side: Valve Stem Seal Driver: T40376/2
- Valve Keeper Tool Kit: VAS5161A with Valve Keeper Tool Kit - Guide Plate 2.5L TFSI: VAS5161A/39
- Pliers - Valve Seal: VAS6770
- Valve Cotter Tool Kit - Knurled Thumb Screws: VAS5161/12
- Mounting Sleeve. Refer to the Parts Information.
Removing
-- Remove the camshaft housing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .
-- Mark the allocation of the roller rocker lever and the hydraulic lifter so they can be installed again.
-- Remove the roller rocker lever with the hydraulic lifter and place them on a clean surface.
-- Remove the spark plugs with the : 3122B .
-- Place the : VAS5161A/39 on the cylinder head.
-- Secure the guide plate with 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)
-- Secure the : VAS5161A/39 .
-- Position the : VAS5161/3A on the valve spring plate and loosen the stuck valve keepers with a plastic mallet.
-- Install the : VAS5161/6 with the Guide Forks M6/M8 with : VAS5161/5 in the guide plate.
-- Push the : VAS 5161/8A 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 keepers.
-- Move the knurled bolt left and right slightly. This presses the valve keepers 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 : 3364 or the : VAS6770 .
Intake Side:
- 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 sealing lip.
-- Insert the valve stem seal in the : 3365 and carefully press on the valve guide -1- all the way.
-- Remove the mounting sleeve.
Exhaust Side:
- 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 sealing lip.
-- Insert the valve stem seal in the : T40376/2 and carefully press on the valve guide -1- all the way.
-- Remove the mounting sleeve.
If the valve keepers were removed from the assembly cartridge, they must then be inserted into the : VAS5161/18 .
- The large diameter of the valve keepers point upward.
-- Press the cartridge from above onto the insertion device and valve keepers.
-- Insert the valve spring and the valve spring retainer. Refer to Figure.
-- Attach the : VAS5161A/39 again on the cylinder head.
-- Insert the assembly cartridge into the guide plate.
-- Press the pressure fork down and pull the knurled bolt up while turning left and right. This inserts the valve keepers.
-- 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:
-- Make sure all the roller rocker levers lie correctly on the ends of the valve stems and are clipped onto the respective hydraulic lifters.
-- Install the camshaft housing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .
-- Install the spark plugs. Refer to OVERVIEW - IGNITION SYSTEM .