Preliminary Work

Information 

• The valve-stem seals can be replaced when installed. 
• For removing valve-stem seals that are difficult to reach, use hand-held valve-stem seal pliers. 
• Depending on the tool setup, peripheral components at the sides, such as water tank walls or servo oil reservoirs, may first have to be removed. 
• The tool can be adjusted to all M6 or M8 studs or internal threads (tool details below). 
• The angle of the assembly bar lever can be adjusted according to space requirements. 

1. Remove camshafts.

   > 150520 REMOVE AND INSTALL CAMSHAFTS 

2. Take hydraulic tappets out of the cylinder head and lay them on a clean surface, arranged according to cylinders and valves. Do not get components mixed up. For details, see

   > 155920 REMOVING AND INSTALLING VALVE LIFTERS (HYDRAULIC TAPPETS)