Skoda OCTAVIA MK1 Service Manual page 77

Note
t Always replace bucket tappet complete (cannot be adjusted or repaired).
t Irregular valve noises when starting engine are normal.
Lay aside removed bucket tappets with the contact surface (camshaft side) facing down
t
onto a clean surface.
After installing new bucket tappets, the engine must not be started for about 30 minutes.
t The hydraulic clearance compensation elements must settle (otherwise valves would strike
the pistons).
After carrying out work on the valve gear, carefully crank engine at least 2 revolutions to
t
ensure that no valve touches the piston when the engine is started.
Test sequence
– Start engine and allow to run until the radiator fan has cut in once.
Increase engine speed to about 2500
–
necessary.
Note
If the irregular valve noises disappear but occur regularly during short trips then the oil
retaining valve must be replaced. The installed location of the oil retaining valve: In the oil
filter holder → Chapter.
If the bucket tappets are still loud, check the faulty tappet as follows:
Remove upper part of collecting intake manifold and cylinder head cover
–
→ Chapter.
Turn the crankshaft clockwise until the cam of the bucket tappet to be tested is positioned
–
on top.
Press down the bucket tappet using a
wooden or plastic wedge. If a 0.20 mm
–
feeler gauge can be inserted between the
camshaft and the bucket tappet, the
tappet must be replaced.
1 rpm for 2 minutes and undertake a test drive if
77
→ Chapter or