Volkswagen Cars 2000-05

Valve Lifters/Hydraulic Lifters/Tappets


General Information

The hydraulic lifters are installed into a machined bore in the cylinder head and receive their lubrication via a series of oil galleys machined into to the engine block and cylinder head. The engine oil is supplied under pressure by the engine's oil pump.

If removed the observe the following guidelines:

Store the lifter with the camshaft contact surface facing down
The lifter must be reinstalled in the same location that it was removed from
The hydraulic lifters are not serviceable. If defective they must be replaced

If a valve has contacted a piston, the lifter associated with that valve should be checked for an out of round condition. If the lifter is dished or out of round by more than 0.002 inches (0.05mm), or if the lifter binds in the bore of the cylinder head, it should be replaced.

To inspect a hydraulic lifter for excessive noise proceed as follows:

  1. Start the engine and allow the engine to run until the coolant temperature reaches 176°F (80°C).
  3. Raise the engine speed to 2,500 RPM for 2 minutes, and if necessary test drive the vehicle.
  5. If the valve noises disappears but then reoccurs during the test drive, on 1.8L and 2.8L V6 models, the oil retaining valve should be replaced.

The oil retaining valve is located as follows:

1.8L engines: Oil filter housing
2.8L V6 engines: Under cover plate at top of engine under intake manifold

  1. If the valve lifter(s) is/are still noisy proceed as follows:
    1. Remove the cam cover(s).
    3. Position the valve such that the pointed end is facing upward.
    5. Using a soft wooded or plastic wedge, press down on the lifter.
    7. On 1.8L and 2.8L V6 models if a 0.008 inch (0.20mm) feeler gauge can be inserted between the camshaft lobe and lifter, the valve lifter should be replaced.
    9. On 2.0L and 2.8L VR6 models, if a 0.004 inch (0.10mm) feeler gauge can be inserted between the camshaft lobe and lifter, the valve lifter should be replaced.

  3. Remove the camshaft(s) to replace the hydraulic lifter(s).

Click image to see an enlarged view

Fig. The hydraulic lifter's oil flow is controlled by the engine oil check valves. The 2.8L V6 valves shown are located in the engine block just below the intake manifold