Hydraulic Bucket Tappet - Volkswagen Marine TDI 100-5 User Manual

Engine mechanical systems

Hydraulic bucket tappet

All Volkswagen Marine boat engines are
equipped with hydraulic bucket tappets.
In addition to reducing noise, they also simplify
servicing:
• No need to check and adjust valve clearance
• Precision valve timing
Camshaft
Oil reservoir
Non-return
valve
Oil feed
High pressure
chamber
The hydraulic bucket tappets essentially
comprise:
• Bucket tappet with piston
• Cylinder
• Non-return valve
Valve noise after starting the engine
is a normal occurrence. Oil is forced
out of the bucket tappet while the
engine is inoperative. As soon as the
engine is running, the high pressure
chamber is filled with oil again and
the valve noise disappears.
Superior 18 Technology
Bucket tappet
Piston
Cylinder
Compression
spring
Valve stem
MSSP_001_012