Subaru IMPREZA GD 2007 Series Manual page 2433

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MECHANICAL
8. Valve Clearance
A: INSPECTION
NOTE:
Inspection and adjustment of valve clearance
should be performed while engine is cold.
1) Set the vehicle on a lift.
2) Disconnect the ground cable from the battery.
3) Remove the air
IN(H4DOTC)-11, REMOVAL, Air Intake Duct.>
4) Remove a bolt which secures timing belt cover
(RH).
5) Lift up the vehicle.
6) Remove the under cover.
7) Loosen the remaining bolts which secure timing
belt cover (RH), then remove the timing belt cover.
8) Lower the vehicle.
9) When inspecting #1 and #3 cylinders
(1) Pull out the engine harness connector to-
gether with bracket from air cleaner upper cov-
er.
(2) Remove the air cleaner case. <Ref. to
IN(H4DOTC)-10, REMOVAL,
Case.>
(3) Disconnect the connector of ignition coil.
(4) Remove the
IG(H4DOTC)-6, REMOVAL, Ignition Coil.>
(5) Place a suitable container under the vehicle.
(6) Disconnect the PCV hose from the rocker
cover (RH).
(7) Remove the bolts, then remove the rocker
cover (RH).
Valve Clearance
FU-00009
intake duct. <Ref. to
ME-00012
Air Cleaner
ignition coil. <Ref. to
ME(H4DOTC)-32
10) When inspecting #2 and #4 cylinders
(1) Disconnect the battery cable, and then re-
move the battery and battery carrier.
(2) Remove the secondary air pump. <Ref. to
EC(H4DOTC)-9, REMOVAL, Secondary Air
Pump.>
(3) Disconnect the connector of ignition coil.
(4) Remove the ignition
IG(H4DOTC)-6, REMOVAL, Ignition Coil.>
(5) Place a suitable container under the vehicle.
(6) Disconnect the PCV hose from the rocker
cover (LH).
(7) Remove the bolts, then remove the rocker
cover (LH).
11) Turn the crank pulley clockwise until the round
mark and arrow mark on the camshaft sprocket are
set to position shown in the figure.
NOTE:
Turn the crankshaft using socket wrench.
12) Measure the #1 cylinder intake valve and #3
cylinder exhaust valve clearance by using thick-
ness gauge (A).
NOTE:
• Insert a thickness gauge in a direction as hori-
zontal as possible with respect to the valve lifter.
• Measure the exhaust valve clearances while lift-
ing-up the vehicle.
Valve clearance:
Standard:
Intake
±
0.20 0.02 mm (0.0079
Exhaust
±
0.35 0.02 mm (0.0138
ME-00013
coil. <Ref. to
ME-03171
±
0.0008 in)
±
0.0008 in)