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VALVE LASH (CLEARANCE)
INSPECTION
1) Remove negative cable at battery.
2) Remove cylinder head cover referring to "CYLINDER HEAD
COVER".
3) Remove right side engine cover if necessary.
4) Using 17 mm wrench, turn crankshaft pulley (1) clockwise
until cam lobes (2) become perpendicular to shim faces (3)
at valves "1" and "7" as shown in figure.
5) Check valve lashes with thickness gauge (4) according to
the following procedure.
a) Check valve lashes at valves "1" and "7".
b) Turn camshafts by 90° (by turning crankshaft with wrench).
c) Make sure that cam lobes are perpendicular to shim faces
at valves to be checked (in this case, "3" and "8"), if not,
adjust it by turning crankshaft. Check valve lashes.
d) In the same manner as b) – c), check valve lashes at valves
"4" and "6".
e) In the same manner as b) – c) again, check valve lashes at
valves "2" and "5".
Valve clearance specification
When cold
(Coolant temperature
is 15 – 25°C
(59 – 77°F))
Intake
0.18 – 0.22 mm
(0.007 – 0.009 in.)
Exhaust
0.28 – 0.32 mm
(0.011 – 0.013 in.)
If valve lash is out of specification, record valve lash and adjust it
to specification by replacing shim.
REPLACEMENT OF SHIM
1) Close the valve whose shim (2) is to be replaced by turning
crankshaft, then turn tappet (3) till its cut section (1) faces
inside as shown in figure.
2) Lift down the it valve by turning crankshaft to 180°.
3) Hold tappet at that position using special tool as follows.
a) Remove its housing bolts.
ENGINE MECHANICAL (M13 ENGINE) 6A1-9
When hot
(Coolant temperature
is 60 – 68°C
(140 – 154°F))
0.21 – 0.27 mm
(0.008 – 0.011 in.)
0.30 – 0.36 mm
(0.012 – 0.014 in.)
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