Subaru IMPREZA 2002 Service Manual page 128

VALVE CLEARANCE
9) Set #1 cylinder piston to top dead center of com-
pression stroke by rotating the crankshaft pulley
clockwise using ST.
ST 4999771 00 CRANKSHAFT PULLEY
WRENCH
NOTE:
When the arrow mark (A) on camshaft sprocket
(LH) comes exactly to the top, #1 cylinder piston is
brought to the top dead center of compression
stroke.
B2M2027B
10) Measure #1 cylinder valve clearance by using
thickness gauge (A).
CAUTION:
Insert the thickness gauge in as horizontal a
direction as possible with respect to the valve
stem end face.
Measure the exhaust valve clearances while
lifting-up the vehicle.
Valve clearance:
Intake;
Exhaust;
0.20M.02
mm
(0.0079M.0008
in)
0.25-20.02
mm
(0.0098M.0008
in)
12) Similar to measurement procedures used for
#1 cylinder, measure #2, #3 and #4 cylinder valve
clearances.
NOTE:
Be sure to set the cylinder pistons to their re-
spective top dead centers on compression stroke
before measuring valve clearances.
To set #3, #2 and #4 cylinder pistons to their top
dead centers on compression stroke, turn the
crankshaft pulley clockwise 90" at a time starting
with arrow mark on left-hand camshaft sprocket
facing up.
#4
#3
B2M2029E
13) After inspection, install the related parts in the
reverse order of removal.
Tightening torque:
Resonator chamber;
33 N-m (3.4 kgf-m, 24 ff-lb)
11) If necessary, adjust the valve clearance. <Ref.
to ME(S0HC)-31, ADJUSTMENT, Valve Clear-
ance.>
ME(S0HC)-30