Valve Stem Seals, Removing And Installing, Cylinder Head Removed: Procedure
-- 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.
-- Insert the Cylinder Head Tensioning Device :VAS 6419 in the Engine and Gearbox Bracket VAS 6095A :VAS 6095A .
-- Tension the cylinder head on the cylinder head tensioning device.
-- Connect the cylinder head tensioning device to compressed air.
-- Slide the air cushion with the lever -arrow- under the combustion chamber onto the valve stem seal that will be removed.
-- Let enough compressed air flow into the air cushion until it contacts the valve plate.
-- Align the Valve Keeper Tool Kit - Guide Plate V6/V8 TFSI :VAS 5161A/38 on the cylinder head at the same time pay attention to the marking:
- Exhaust side
- Intake side
-- Tighten the guide plate bolts -arrows- to 9 Nm.
-- Position the Valve Cotter Tool Kit - Punch :VAS 5161/3A on the valve spring plate and loosen the stuck valve keepers with a plastic mallet.
-- Install the Retainer :VAS 5161/6 with the Guide Forks M6/M8 with Threaded Studs :VAS 5161/5 in the guide plate.
-- Insert the Valve Keeper Tool Kit - Assembly Cartridge :VAS 5161/8A into guide plate.
-- Engage the Valve Keeper Tool Kit - Pressure Fork :VAS 5161/2 at the engaging device and press the installation cartridge downward.
-- At the same time, turn the installation cartridge knurled bolt -arrow- 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.
- The knurled bolt slides all the way in the assembly cartridge.
-- Release the pressure fork.
-- Remove the assembly cartridge.
-- For the reinstallation of the valve springs for the exhaust valve mark the installation position with pant.
-- Remove the valve spring and the valve spring retainer.
-- Remove the valve stem seal:
Intake side:
-- To do so use the Puller - Valve Seal :3364 .
Exhaust side:
-- For this, use the Extracting Tool :T40429 .
The illustration above shows the procedure using the Puller - Valve Seal :3364 . The procedure using the Extracting Tool :T40429 is identical.
Intake side:
-- Lightly oil the valve stem seal sealing lip -3-.
- Depending on the version/manufacturer of the valve stem seal, use the Seal Installer - Valve Stem :3365 or Fitting Tool :T40376/1
-- Insert the valve stem seal in the seal driver -4- and carefully press on over valve stem sleeve -2- on the valve guide -1- all the way.
Exhaust side:
-- Lightly oil the valve stem seal sealing lip -3-.
-- Insert the valve stem seal in the Valve Stem Seal Driver :T40376A/2A -4- and carefully press on over valve stem sleeve -2- on the valve guide -1- all the way.
Continuation:
If the valve keepers were removed from the assembly cartridge, they must then be inserted into the Valve Keeper Tool Kit - Valve Insertion Device :VAS 5161/18 .
- 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:
- Intake valve installation position. Refer to Figure.
- Exhaust valve installation position. Refer to Figure.
-- Insert the Valve Keeper Tool Kit - Assembly Cartridge :VAS 5161/8A back into the Valve Keeper Tool Kit - Guide Plate V6/V8 TFSI :VAS 5161A/38 .
-- Press the Valve Keeper Tool Kit - Pressure Fork with Lever for Assembly Cartridge :VAS 5161/2 down and pull the knurled screw -arrow- up while turning left and right. This inserts the valve retainers.
-- 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 .