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Replacing the valve stem seals on the installed cylinder head (Superb II, Octavia II, Fabia II, Roomster) > < Removing and installing the camshaft (Roomster)|Install

Fabia Mk2

Testing hydraulic bucket tappets (Superb II, Octavia II, Fabia II, Roomster)
Testing hydraulic bucket tappets (Superb II, Octavia II, Fabia II, Roomster)
Special tools and workshop equipment required
t  Feeler gauges
t  Wooden or plastic wedge
  Note
t  Hydraulic bucket tappets cannot be repaired.
t  Irregular valve noises when starting engine are normal.
Test sequence
–  Start engine and allow to run until the radiator fan starts. Increase revolutions to about 2500 rpm for 2 minutes and undertake a test drive if necessary.
  Note
If there are irregular valve noises which disappear after a long drive but keep reappearing on short journeys then the oil retaining valve is defective. Fitting location: in the oil filter holder. The oil retaining valve cannot be replaced individually.
If the hydraulic bucket tappets are still loud, determine the faulty hydraulic bucket tappets as follows:
–  Remove the cylinder head cover Superb II → Chapter, Octavia II → Chapter, Fabia II → Chapter, Roomster → Chapter.
–  Turn the crankshaft until the cam of the hydraulic bucket tappets to be tested is positioned on top, while doing so push the vehicle forward in 4th gear when ignition is switched off.
   
–  Determine the play between the cams and the bucket tappet:
–  Press down the bucket tappet using a wooden or plastic wedge.
If a 0.20 mm feeler gauge can be slipped between the camshaft and the bucket tappet:
–  Replace the hydraulic bucket tappets Superb II → Chapter, Octavia II → Chapter, Fabia II → Chapter, Roomster → Chapter.
  Note
t  After installing the camshaft, the engine must not be started for about 30 minutes. The hydraulic bucket tappets must settle (otherwise valves would strike the pistons).
t  After carrying out work on the valve gear, carefully crank engine at least 2 revolutions to ensure that no valve touches the piston when the engine is started.
  S15-0372

Replacing the valve stem seals on the installed cylinder head (Superb II, Octavia II, Fabia II, Roomster) > < Removing and installing the camshaft (Roomster)|Install