Fiat X 1/9 1978 - VALVE CLEARANCE

Tune-Up
Ill—1974
Section
N0.
00
Page
9
This
section
contains
information
needed
to
perform
a
tune-up
of
the
engine.
Perform
the
tasks
in
this
section
according
to
the
MAINTENANCE
chart.
Example:
If
doing
tune-up
at
6,000
miles,
clean
spark
plugs.
If
doing
tune—up
at
12,000
miles,
change
spark
plugs.
SPARK
PLUGS
Remove
plugs.
Inspect
plugs
for
condition.
Clean
or
replace
plugs.
Adjust
gap
of
plugs.
Gap—0.020
to
0.024
in
(0.5
to
0.6mm)
NOTE:
if
you
are
going
to
check
valve
clearance
leave
plugs
out
until
clearance
is
adjusted.
VALVE
CLEARANCE
Remove
air
cleaner.
Disconnect
throttle
rod
(3)
from
control
(4)
on
valve
cover
(1).
Disconnect
hoses
to
pro-
vide
clearance.
Remove
6
nuts
(2)
holding
cover.
Remove
cover
(1).
1.
Cover.
2.
Nuts.
3.
Throttle
rod.
4.
Control.
Turn
crankshaft
until
lobe
on
camshaft
for
valve
being
checked
is
pointing
up
and
at
right
angle
to
valve.
Measure
clearance
between
camshaft
and
tappet
plate.
Clearance:
Intake
—
0.012
in.
(0.30mm)
Exhaust
—
0.016
in.
(0.40mm)
1.
Lobe.
2.
Plate.
3.
Tappet.
4.
Feeler
gauge.
WIRE
GAGE
,
0.020
TO
0.024