Subaru Impreza 2003 Service Manual page 1016

MECHANICAL
(3) Set the arrow mark on camshaft sprocket to
position shown in the figure, and then measure
the #1 cylinder exhaust valve and #4 cylinder in-
take valve clearances.
15) After inspection, install the related parts in the
reverse order of removal.
Tightening torque:
33 N·m (3.4 kgf-m, 25 ft-lb)
VALVE CLEARANCE
B: ADJUSTMENT
CAUTION:
Adjustment of the valve clearance should be
performed while engine is cold.
1) Measure
ME(H4DOTC)-40, INSPECTION, Valve Clear-
ance.>
NOTE:
Record each valve clearance after it has been
measured.
ME-00736
2) Remove the camshaft. <Ref. to ME(H4DOTC)-
72, REMOVAL, Camshaft.>
3) Remove the valve lifter.
4) Measure the thickness of valve lifter with a mi-
crometer.
ME-00023
5) Select a shim of suitable thickness using mea-
sured valve clearance and valve lifter thickness, by
referring to the following table.
Intake valve: S =V – 0.20
Exhaust valve: S =V – 0.25
S: Valve lifter thickness to be used
V: Measured valve clearance
ME(H4DOTC)-42
all valve clearances. <Ref. to
ME-00024
ME-00025
Unit: mm