Suzuki RA410, Manual

Page: 268 / 761

VALVE LASH (CLEARANCE)
1) Remove negative cable at battery.
2) Remove cylinder head cover referring to item “Cylinder Head
cover” in this section.
3) Using 17 mm wrench, turn crankshaft pulley clockwise until cam
lobes become perpendicular to shim faces at valves and
(valve No.s through are shown in figure) as shown in fig-
ure.
4) Check valve lashes with thickness gauge (1) according to fol-
lowing procedure.
(1) Check valve lashes at valves
and .
(2) Turn camshafts by 180 (by turning crankshaft with wrench).
(3) Make sure that cam lobes are perpendicular to shim faces
at valves to be checked (in this case, and
)
, if not, adjust
it by turning crankshaft. Check valve lashes.
(4) In the same manner as (2) – (3), check valve lashes at valves
and .
(5) In the same manner as (2) – (3) again, check valve lashes
at valves and .
If valve lash is out of specification, adjust it to specification by re-
placing shim.
1
1. Thickness gauge
Replacement of shim
1) Close the valve whose shim (2) is to be replaced by turning
crankshaft, then turn tappet (1) till its cut section (3) faces inside
as shown in figure.
1
3
2
ENGINE MECHANICAL 6A4-9
Valve
clearance
When cold
(Coolant temperature
is 15 – 25
_
C or
59 – 77
_
F)
When hot
(Coolant temperature
is 60 – 68
_
C or
140 – 154
_
F)
specifica-
tion
Intake
0.18 – 0.23 mm
0.21 – 0.27 mm
(0.008 – 0.011 in.)
Ex-
haust
(0.007 – 0.009 in.)
0.20 – 0.26 mm
(0.008 – 0.010 in.)