Valve Stem Seals, Cylinder Head Installed

Valve Stem Seals, Cylinder Head Installed

Special tools, testers and auxiliary items required

• Hinged Socket (3220)

• Valve Seal Removal Tool (3364)

• Valve Stem Seal Driver (3365)

• Valve Cotters Asm/Dis-Asm Device (VAS 5161) with Knurled Spacer Ring (VAS 5161/23-1) and Guide Plate (VAS 5161/23)

Removing

- Remove all the glow plugs.

- Camshafts, removing. Refer to => [ Left Cylinder Head Camshaft ] Left Cylinder Head Camshaft, => [ Right Cylinder Head Camshaft ] Right Cylinder Head Camshaft.






- 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.

- Move piston for respective cylinder to "Bottom Dead Center (BDC) position".

- Mount the (VAS 5161/23) on cylinder head.






- Secure the guide plate with the knurled screws (VAS 5161/12).

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

- Install the sealing bolt (VAS 5161/10) into the guide plate.






- Install the adapter (VAS 5161/11) by hand into the glow plug thread.

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






- Slide the knurled spacer ring (VAS 5161/23-1) onto the installation cartridge (VAS 5161/8).

- Connect the adapter to the compressed air using a commercially available intermediate piece and give steady pressure.

• Minimum pressure: 6 bar positive pressure.

- 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 the 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 the pressure fork.

- Remove the installation cartridge with the knurled spacer ring.

- Remove the valve spring and the valve spring plate.

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






If puller cannot be used on several valve stem seals due to restricted clearance, proceed as follows:

- Remove the roll pin - arrow - on the puller with a drift and remove the impact puller attachment.






- Position the lower part of the (3364) on the valve stem seal.

- Secure the puller with a drift or cotter drive pin - 1 - as shown in the illustration.






- Position the valve lever on the puller and remove the valve stem seal - arrow -.

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 the (3365).

- Remove plastic sleeve.

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






• 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 the valve retainers.

- Insert installation cartridge in the (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

Assemble in reverse order of disassembling. Note the following:

- Camshafts, installing. Refer to => [ Left Cylinder Head Camshaft ] Left Cylinder Head Camshaft, => [ Right Cylinder Head Camshaft ] Right Cylinder Head Camshaft.

- Install the glow plugs.