6A2-6 ENGINE MECHANICAL (K9K ENGINE)
Valve Lash (Clearance)
Measurement of valve lash (clearance)
1) Disconnect negative (–) cable at battery.
2) Remove cylinder head cover referring to “Cylinder Head
Cover Removal and Installation” in this section.
3) Turn crankshaft pulley clockwise until cam lobes become
perpendicular to tappet faces at valves “1” and “6” as shown
in figure.
4) Measure valve lashes with thickness gauge (1) according to
the following procedure.
a) Check valve lashes at valves “1” and “6”.
b) Turn camshaft by 90° (by turning crankshaft with wrench).
c) Make sure that cam lobes are perpendicular to tappet faces
at valves to be checked (in this case, “5” 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 “7”.
e) In the same manner as b) – c), check valve lashes at valves
“2” and “3”.
If valve lash (clearance) is out of specification, record valve lash
(clearance) and adjust it to specification by replacing tappet.
Refer to “Replacement of tappet” under “Valve Lash (Clearance)”
in this section.
Valve lash (clearance) specification
Replacement of tappet
1) Measure valve lashes referring to “Measurement of Valve
Lash (Clearance)” under “Valve Lash (Clearance)” in this
section.
2) Remove tappet referring to “Camshaft and Tappet” in this
section.
3) Using micrometer, measure the thickness of the removed
tappet, and determine replacement tappet by calculating the
thickness of new tappet with the following formula and table.
Intake side
A = B + C – 0.1875 mm (0.007382 in.)
Exhaust side
A = B + C – 0.3875 mm (0.015256 in.)
A: Thickness of new tappet
B: Thickness of removed tappet
C: Measured valve lash (clearance)
When cold
Intake
0.125 – 0.250 mm (0.00493 – 0.00984 in.)
Exhaust
0.325 – 0.450 mm (0.01280 – 0.01771 in.)
1
"1" "2" "3" "4" "5" "6" "7" "8"