Subaru Impreza 2002 Service Manual page 168

(5) Move the washer tank upward.
(6) Disconnect the spark plug cords from spark
plugs (#2 and #4 cylinders).
(7) Place a suitable container under the vehicle.
(8) Disconnect the PCV hose from rocker cover
(LH).
(9) Remove the bolts, then remove the rocker
cover (LH).
11) Turn the crankshaft pulley clockwise until arrow
mark on camshaft sprocket is set to position shown
in the figure.
NOTE:
Turn the crankshaft using ST.
ST 499987500 CRANKSHAFT SOCKET
12) Measure the #1 cylinder intake valve and #3
cylinder exhaust valve clearance by using thick-
ness gauge (A).
CAUTION:
• Insert the thickness gauge in direction as
horizontal as possible with respect to the shim.
• Measure the exhaust valve clearances while
lifting-up the vehicle.
Valve clearance:
Intake: 0.20 ± ± ± ± 0.02 mm (0.0079 ± ± ± ± 0.0008 in)
Exhaust: 0.25 ± ± ± ± 0.02 mm (0.0098 ± ± ± ± 0.0008 in)
VALVE CLEARANCE
NOTE:
If the measured value is not within specification,
take notes of the value in order to adjust the valve
clearance later on.
H6M0431
13) If necessary, adjust the valve clearance. <Ref.
to ME(STi)-30, ADJUSTMENT, Valve Clearance.>
14) Further turn the crankshaft pulley clockwise.
Using the same procedures described previously,
then measure the valve clearances again.
(1) Set the arrow mark on camshaft sprocket to
position shown in the figure, and measure #2
cylinder exhaust valve and #3 cylinder intake
valve clearances.
(2) Set the arrow mark on camshaft sprocket to
EN1197
position shown in the figure, and measure #2
cylinder intake valve and #4 cylinder exhaust
valve clearances.
ME(STi)-29
MECHANICAL
B2M1234B
EN1198
EN1199