Subaru 2009 IMPREZA Service Manual page 247

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.
Valve Clearance
2) Adjust the #1 cylinder valve clearance.
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):
Tightening torque:
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-
( A )
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
ME-00200
valve clearances.
5) After measurement, install the related parts in
the reverse order of removal.
NOTE:
Use a new rocker cover gasket.
ME(H4SO)-29
(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.
Intake
0.20 0.04 mm (0.0079 0.0016 in)
Exhaust
0.25 0.04 mm (0.0098 0.0016 in)
9.75 N·m (1.0 kgf-m, 7.2 ft-lb)
MECHANICAL
ME-00203