Fiat X 1/9 1978 - Gr. 102-FUEL SYSTEM AND EXHAUST; Valve Mechanism; REPLACING TAPPETS AND VALVE GUIDES

Valve
Mechanism
REPLACING
TAPPETS
AND
VALVE
GUIDES
Make
sure
tappet
plate
surface
in
contact
with
lobes
on
camshaft
is
glass-like
and
shows
no
signs
of
dishing
or
pitting.
Check
tappet
diameter
and
tappet
bore
diameter
in
housing.
Tappet
clearance
in
bore
should
be
0.002
to
0.020
in.
(0.005
to
0.050mm)
III-1974
Section
No.
101.07
Page
51
_
37.000
,
37,025
i
____
.
]:l
[1.10.014
M
+
._
30,975
35,995
Valve
guides
are
press
fitted
in
their
bores.
Interference
should
be
0.0025
to
0.0043
in.
(0.063
to
0.08mm).
Valve
guides
are
available
for
service
in
the
standard
size
and
0.008
in.
(0.2mm)
oversize.