Valve Lash (Clearance) - Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual

6A1-8 ENGINE MECHANICAL (G16 ENGINE)

Valve Lash (Clearance)

1) Remove negative cable at battery.
2) Remove cylinder head cover referring to "Cylinder Head
Cover" in this section.
3) Using 17 mm socket, turn crankshaft pulley (1) clockwise
until "V" mark (in white paint) (2) on pulley aligns with "0"
(zero) calibrated on timing belt cover.
4) Check if the rocker arms of No.1 cylinder are off the respec-
tive cam lobes (of camshaft); if so, valves (1), (2), (5) and (7)
in the figure are ready for clearance checking and adjust-
ment.
Check valve lashes at valves (1), (2), (5) and (7).
If the rocker arms of No.4 cylinder are off the respective cam
lobes, check valve lashes at valves (3), (4), (6) and (8).
NOTE:
When checking valve clearance, insert thickness gauge
between camshaft and cam-riding face of rocker arm.
5) If valve lash is out of specification, adjust it to specification by
turning adjusting screw after loosening lock nut.
After adjustment, tighten lock nut to specified torque while
holding adjusting screw stationary, and then make sure
again that valve lash is within specification.
Valve clearance specification
When cold
(Coolant tempera-
ture is 15 – 25°C or
59 – 77°F)
0.13 – 0.17 mm
Intake
(0.005 – 0.006 in.)
0.23 – 0.27 mm
Exhaust
(0.009 – 0.010 in.)
Special tool
(A) : 09917-18211
Tightening torque
Rocker arm adjusting screw lock nut
(a) : 12 N·m (1.2 kg-m, 9.0 lb-ft)
1. Thickness gauge
When hot
(Coolant tempera-
ture is 60 – 68°C or
140 – 154°F)
0.17 – 0.21 mm
(0.007 – 0.008 in.)
0.28 – 0.32 mm
(0.011 – 0.012 in.)