Inspecting Hydraulic Tappets - Skoda FABIA 2000 Workshop Manual

FABIA 2000 1.0/37; 1.4/44; 1.4/50 Engine, Mechanical Components
Fig. 3: Arrangement of rocker arms and rocker arm
brackets
1 - Straight rocker arm
2 - Inclined rocker arm, to the left
3 - Inclined rocker arm, to the right
A - Rocker arm bracket for M11 bolt, on outside
B - Rocker arm bracket for M8 bolt
C - Rocker arm bracket for M11 bolt, on inside
Note
The rocker arms for the inlet valves are shown in dark in
the illustration.

Inspecting hydraulic tappets

Special tools, test and measuring equipment and
auxiliary items required
♦
Feeler gauge
♦ Wooden or plastic wedge
Note
♦ Always replace hydraulic tappet complete (cannot be
adjusted or repaired).
♦ Irregular valve noises when starting engine are nor-
mal.
Test sequence
–
Start engine and allow to run until the radiator fan has
cut in once.
–
Increase engine speed to about 2500 rpm for 2 min-
utes.
If the hydraulic tappets are still loud, determine the faulty
tappet as follows:
–
Remove cylinder head cover.
–
Rotate crankshaft until the valves of cylinder 4 overlap
(inlet valve opens and exhaust valve closes).
–
Apply a load to the hydraulic tappet by pressing slight-
ly several times on the adjusting screw with a wooden
or plastic wedge.
–
Attempt to insert a 0.2 mm feeler gauge -arrow- be-
tween rocker arm and valve.
If it is possible to insert a feeler gauge between rocker
arm and valve and the tappet at the same time moves
down, replace the tappet.
If play was measured only between rocker arm and valve
(tappet does not move down), carry out basic setting of
the hydraulic valve clearance compensation ⇒ Chap. 15-
2, after the setting, repeat the inspection.
–
Inspect tappets at the other cylinders by carrying out
the same procedure.
Edition 03.01
S00.5305.02.20
1
2
B
A
Repairing valve gear
2 2
3 3
C C
B B
15
1
3
B
A
S15-0132
S15-0189
15-3 3
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