Subaru Legacy III (2000-2003 year). Manual - part 54

ME(H4SO)-28

MECHANICAL

FUEL PRESSURE

7. Fuel Pressure

A: INSPECTION

WARNING:
Before removing the fuel pressure gauge, lower
the fuel pressure.

NOTE:
If out of specification, check or replace the pressure
regulator and pressure regulator vacuum hose.
1) Lower the fuel pressure. <Ref. to FU(H4SO)-48,
RELEASING OF FUEL PRESSURE, OPERA-
TION, Fuel.>
2) Open the fuel flap lid, and then remove the fuel
filler cap.
3) Disconnect the fuel delivery hoses from fuel
damper, and then connect the fuel pressure gauge.

4) Connect the connector of fuel pump relay.

5) Start the engine.
6) Measure the fuel pressure while disconnecting
the pressure regulator vacuum hose from intake
manifold.

Fuel pressure:

Standard; 284 — 314 kPa (2.9 — 3.2 kg/cm

41 — 46 psi)

7) After connecting the pressure regulator vacuum
hose, measure the fuel pressure.

Fuel pressure:

Standard; 206 — 235 kPa (2.1 — 2.4 kg/cm

30 — 34 psi)

NOTE:
The fuel pressure gauge registers 10 to 20 kPa (0.1
to 0.2 kg/cm

, 1 to 3 psi) higher than standard val-

ues during high-altitude operations.

ME-00641

ME-00420

ME-00198

ME(H4SO)-29

MECHANICAL

VALVE CLEARANCE

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).

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.

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;

0.20

±±±±

0.02 mm (0.0079

±±±±

0.0008 in)

Exhaust;

0.25

±±±±

0.02 mm (0.0098

±±±±

0.0008 in)

11) If necessary, adjust the valve clearance. <Ref.
to ME(H4SO)-30, ADJUSTMENT, Valve Clear-
ance.>

FU-00009

ME-00199

ME-00200

( A )

ME-00201

( A )

ME(H4SO)-30

MECHANICAL

VALVE CLEARANCE

12) Similar to measurement procedures used for
#1 cylinder, measure the #2, #3 and #4 cylinder
valve clearances.

NOTE:
• Be sure to set the cylinder pistons to their re-
spective top dead centers on compression stroke
before measuring valve clearances.
• To set the #3, #2 and #4 cylinder pistons to their
top dead centers on compression stroke, turn the
crankshaft pulley clockwise 90

at a time starting

with arrow mark on camshaft sprocket (LH) facing
up.

13) After inspection, install the related parts in the
reverse order of removal.

Resonator chamber;

Air cleaner case;

33 N·m (3.4 kgf-m, 25 ft-lb)

B: ADJUSTMENT

NOTE:
Adjustment of the valve clearance should be per-
formed while engine is cold.
1) Set the #1 cylinder piston to top dead center of
compression stroke by rotating crankshaft pulley
clockwise using 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.

2) Adjust the #1 cylinder valve clearance.

(1) Loosen the valve rocker nut and screw.
(2) Place suitable thickness gauge.
(3) While noting the valve clearance, tighten the
valve rocker adjuster screw.
(4) When specified valve clearance is obtained,
tighten the valve rocker nut.

Tightening torque:

10 N·m (1.0 kgf-m, 7.2 ft-lb)

CAUTION:
• Insert the thickness gauge in as horizontal a
direction as possible with respect to the valve
stem end face.
• Adjust the exhaust valve clearances while
lifting up the vehicle.

ME-00202

ME-00327

ME-00200

( A )

ME(H4SO)-31

MECHANICAL

VALVE CLEARANCE

Valve clearance:

Intake;

0.20

±±±±

0.02 mm (0.0079

±±±±

0.0008 in)

Exhaust;

0.25

±±±±

0.02 mm (0.0098

±±±±

0.0008 in)

3) Ensure the valve clearances are within specifi-
cations.
4) Turn the crankshaft two complete rotations until
#1 cylinder piston is again set to the top dead cen-
ter on compression stroke.
5) Ensure the valve clearances are within specifi-
cations. If necessary, readjust the valve clearanc-
es.
6) Similar to adjustment procedures used for #1
cylinder, adjust the #2, #3 and #4 cylinder valve
clearances.

NOTE:
• Be sure to set the cylinder pistons to their re-
spective top dead centers on compression stroke
before adjusting valve clearances.
• To set the #3, #2 and #4 cylinder pistons to their
top dead centers on compression stroke, turn the
crankshaft pulley clockwise 90

at a time starting

with arrow mark on camshaft sprocket (LH) facing
up.

ME-00203

ME-00202

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