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Valve seats: Reworking > < Valve control: removing and fitting

Leon Mk1

Hydraulic tappets: checking
Hydraulic tappets: checking
Special tools and workshop equipment required
t  Gauge
t  Wooden or plastic wedge
  Note
t  Replace hydraulic cam tappets as a set. (They cannot be adjusted or repaired individually.)
t  Irregular noises coming from the valves on starting are normal.
Test sequence
–  Start engine and turn until radiator fan has been activated once.
–  Raise engine speed to approx. 2,500 rpm for about 2 minutes.
If the hydraulic tappets continue to make noise check to see which one/s is/are faulty as follows:
–  Removing the cylinder head cover → Chapter.
–  Turn crankshaft clockwise until cams at bucket tappet to be tested are at top.
–  Check the clearance between cams and tappets.
–  If play is more than 0.2 mm, replace tappet. If a play of less than 0.1 mm or no play is measured, continue check as follows:
   
–  Push the tappet down lightly with a wooden or plastic wedge. If it is possible to insert a 0.2 mm thick feeler gauge between the camshaft and the tappet, the latter should be replaced.
  Note
After fitting new tappets, the engine must not be started for approx. 30 minutes. The hydraulic valve compensation elements will have to settle (otherwise, the valves would strike the pistons).
  V15-0708

Valve seats: Reworking > < Valve control: removing and fitting