Valve Stem Seals With Cylinder Head Removed

Valve Stem Seals with Cylinder Head Removed

Special tools, testers and auxiliary items required

• Valve Seal Removal Tool (3364)

• Valve Stem Seal Driver (3365)

• Valve Retainer Disassembly and Assembly Device (VAS 5161) with Guide Plate (VAS 5161/23) and Sleeve (VAS 5161/23-1)

• Engine and Transmission Holder (VAS 6095)

• Cylinder Head Tensioning Device (VAS 6419)

• M6 nut without a collar, quantity: 2

Procedure

- Camshafts, removing, refer to => [ Camshafts ] Service and Repair.

- 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.

- Mount the (VAS 6419) into the (VAS 6095).

- 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 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.

- Position guide plate (VAS 5161/23) on cylinder head.





- Secure the guide plate on the intake manifold side with the knurled bolt (VAS 5161/12) and on the stud bolts with 2 M6 nut with a collar - 1 - by hand.

- Insert the drift (VAS 5161/3) in the guide plate and loosen the stuck valve retainers with a plastic mallet.





- Install engaging device (VAS 5161/6) with installation fork (VAS 5161/5) in guide plate.





- Install the sleeve (VAS 5161/23-1) on the installation cartridge (VAS 5161/8).

- Engage pressure fork (VAS 5161/2) on engaging device and press installation cartridge down.

- At the same time, rotate installation 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 installation cartridge.

- Release pressure fork.

- Remove the installation cartridge with the knurled spacer ring.

- Remove valve spring with valve spring plate.

- Remove the valve stem seal with the (3364).






Risk of damage when installing valve stem seals.

• Place plastic sleeve - A - that is attached to valve stem seals - B - on valve stem.







- Lightly oil valve stem seal.

- Slide valve shaft seal onto plastic sleeve.

- Carefully press valve stem seal onto valve guide with (3365).

- Remove plastic sleeve.

When the valve retainers were removed from the installation cartridge, they must be inserted in the valve retainer inserting tool next (VAS 5161/18).





• The large diameter of the valve retainers point upward.

- Insert valve spring and valve spring plate.

- Press the installation cartridge onto the insertion device for the valve retainers from above and take up valve retainers.

- Insert installation cartridge in guide plate (VAS 5161/23).





- 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

Assembly is in reverse order of removal, 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 camshafts. Refer to => [ Camshafts ] Service and Repair.