ENGINE MECHANICAL (M13 ENGINE) 6A2-13
Valve Lash (Clearance) Inspection
1) Remove negative cable at battery.
2) Remove cylinder head cover referring to “Cylinder Head
Cover Removal and Installation” in this section.
3) Remove right side engine under 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 (2) are perpendicular to shim
faces (3) 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”.
If valve lash is out of specification, record valve lash and adjust it
to specification referring to “Shim Replacement” in this section.
Valve clearance specification
Shim Replacement
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 valve by turning crankshaft to 360°.
3) Hold tappet at that position using special tool as follows.
a) Remove its housing bolts.
When cold
(Coolant temperature
is 15 – 25°C
(59 – 77°F))
When hot
(Coolant temperature
is 60 – 68°C
(140 – 154°F))
Intake 0.18 – 0.22 mm
(0.007 – 0.009 in.)
0.21 – 0.27 mm
(0.008 – 0.011 in.)
Exhaust 0.28 – 0.32 mm
(0.011 – 0.013 in.)
0.30 – 0.36 mm
(0.012 – 0.014 in.)
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