Inspecting Hydraulic Bucket Tappets - Skoda OCTAVIA Workshop Manual

15
------------ 15-18 ------------
Cylinder Head, Valve Gear
Notes:
♦ After installing the camshaft, the engine must
not be started for about 30 minutes. The hy-
draulic valve clearance compensating ele-
ments have to settle (otherwise valves will
strike the pistons).
♦ After carrying out work on the valve gear,
carefully crank engine at least 2 revolutions
to ensure that no valve strikes the piston
when the engine is started.
Inspecting hydraulic bucket tap-
pets
Notes:
♦ Always replace the bucket tappets complete
(cannot be adjusted or repaired).
♦ Irregular valve noises when starting are nor-
mal.
Special tools, testers and aids required
♦ Feeler gauge
♦ Wooden or plastic wedge
Inspection procedure
- Start engine and continue running until the
radiator fan has cut in once.
- Increase engine speed to about 2500 rpm
for 2 minutes; carry out a road test if neces-
sary.
If the hydraulic bucket tappets are still loud, de-
termine the faulty tappet as follows:
- Remove cylinder head cover.
- Rotate crankshaft clockwise until the cams
of the bucket tappets to be inspected are
facing up.
- Determine clearance between cam and
bucket tappet.
K - Use a wooden or plastic wedge to press
bucket tappet down. If it is possible to insert
a 0.20 mm feeler gauge between camshaft
and bucket tappet, replace tappet.
OCTAVIA
Edition 03.98
S00.5110.52.20