Valve Clearance - Subaru Legacy 2003 Service Manual

8. Valve Clearance

A: INSPECTION
NOTE:
Inspection and adjustment of the valve clearance
should be performed while engine is cold.
1) Set the vehicle on a lift.
2) Lift-up the vehicle.
3) Remove the under cover.
4) Lower the vehicle.
5) Disconnect the ground cable from battery.
6) Remove the belt cover (LH).
7) When inspecting the #1 and #3 cylinders;
(1) Disconnect the spark plug cords from spark
plugs (RH side).
(2) Disconnect the PCV hose from rocker cover
(RH).
(3) Remove the bolts, and then remove the
rocker cover (RH).
8) When inspecting the #2 and #4 cylinders;
(1) Disconnect the spark plug cords from spark
plugs (LH Side).
(2) Disconnect the PCV hose from rocker cover
(LH).
(3) Remove the bolts, and then remove the
rocker cover (LH).
VALVE CLEARANCE
9) Set the #1 cylinder piston to top dead center of
compression stroke by rotating crankshaft pulley
clockwise using a socket wrench.
NOTE:
When arrow mark (A) on the camshaft sprocket
(LH) comes exactly to the top, #1 cylinder piston is
brought to the top dead center of compression
stroke.
10) Measure the #1 cylinder valve clearance by us-
ing thickness gauge.
FU-00009
CAUTION:
• Insert the thickness gauge (A) in as horizon-
tal 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;
ME-00199
11) If necessary, adjust the valve clearance. <Ref.
to ME(H4SO)-30, ADJUSTMENT, Valve Clear-
ance.>
ME(H4SO)-29
0.20 ± ± ± ± 0.02 mm (0.0079 ± ± ± ± 0.0008 in)
0.25 ± ± ± ± 0.02 mm (0.0098 ± ± ± ± 0.0008 in)
MECHANICAL
( A )
ME-00200
( A )
ME-00201