Subaru 2002 IMPREZA Service Manual page 1071

(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, and then remove the
rocker cover (LH).
11) Turn the crankshaft pulley clockwise until arrow
mark on the camshaft sprocket is set to position
shown in the figure.
NOTE:
Turn the crankshaft using ST.
ST 499987500 CRANKSHAFT SOCKET
VALVE CLEARANCE
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 as horizontal a
direction 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)
H6M0431
NOTE:
If the measured value is not within specification,
take notes of the value in order to adjust the valve
clearance later on.
13) If necessary, adjust the valve clearance. <Ref.
to ME(TURBO)-30, ADJUSTMENT, Valve Clear-
ance.>
14) Further turn the crankshaft pulley clockwise.
Using the same procedures described previously,
and then measure the valve clearances again.
(1) Set the arrow mark on camshaft sprocket to
position shown in the figure, and then measure
the #2 cylinder exhaust valve and #3 cylinder in-
S2M1192B
take valve clearances.
ME(TURBO)-29
MECHANICAL
B2M1234B
S2M1194B