Subaru 2009 IMPREZA, Руководство по обслуживанию

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ME(H4SO)-29
Valve Clearance
MECHANICAL
12) Measure the valve clearance in #3, #2 and #4
cylinder in the same measurement procedure as #1
cylinder in this order.
NOTE:
• Be sure to set the cylinder pistons to their re-
spective top dead centers on compression stroke
before measuring valve clearances.
• By rotating the crank pulley clockwise every 180°
from the state that #1 cylinder piston is on the top
dead center of compression stroke, #3, #2 and #4
cylinder pistons come to the top dead center of
compression stroke in this order.
13) If necessary, adjust the valve clearance. <Ref.
to ME(H4SO)-29, ADJUSTMENT, Valve Clear-
ance.>
14) After inspection, install the related parts in the
reverse order of removal.
NOTE:
Use a new rocker cover gasket.
B: ADJUSTMENT
CAUTION:
If engine oil is spilt onto the exhaust pipe, wipe
it off with cloth to avoid emission of smoke or
causing a fire.
NOTE:
Adjustment of valve clearance should be per-
formed while engine is cold.
1) Set #1 cylinder piston to top dead center of com-
pression stroke by rotating the crank pulley clock-
wise using the socket wrench.
NOTE:
When the arrow mark (A) on cam sprocket LH is at
the top position, the #1 cylinder piston is at top
dead center of the compression stroke.
2) Adjust the #1 cylinder valve clearance.
(1) Loosen the valve rocker nut and screw.
(2) Set a suitable thickness gauge.
(3) While noting the valve clearance, tighten the
valve rocker adjusting screw.
(4) When the specified valve clearance is ob-
tained, tighten the valve rocker nut.
NOTE:
• Insert a thickness gauge in a direction as hori-
zontal as possible with respect to the valve stem
end face.
• Lift up the vehicle and adjust the exhaust valve
clearances.
Valve clearance (adjustment value):
Intake
0.20
r
0.04 mm (0.0079
r
0.0016 in)
Exhaust
0.25
r
0.04 mm (0.0098
r
0.0016 in)
Tightening torque:
9.75 N·m (1.0 kgf-m, 7.2 ft-lb)
3) Adjust the valve clearance in #3, #2 and #4 cyl-
inder in the same adjustment procedure as #1 cyl-
inder in this order.
NOTE:
• Be sure to set the cylinder pistons to their re-
spective top dead centers on compression stroke
before adjusting valve clearances.
• By rotating the crank pulley clockwise every 180°
from the state that #1 cylinder piston is on the top
dead center of compression stroke, #3, #2 and #4
cylinder pistons come to the top dead center of
compression stroke in this order.
4) Ensure the valve clearances of each cylinder are
within specifications. If necessary, readjust the
valve clearances.
5) After measurement, install the related parts in
the reverse order of removal.
NOTE:
Use a new rocker cover gasket.
ME-00200
( A )
ME-00203