Subaru Legacy III (2000-2003 year). Manual - part 426

ME(H4DOSTC)-68

MECHANICAL

CYLINDER HEAD ASSEMBLY

5. VALVE SPRINGS

1) Check the valve springs for damage, free length,
and tension. Replace the valve spring if it is not
within specifications presented in the table.
2) To measure the squareness of valve spring,
stand the spring on a surface plate and measure its
deflection at the top using a try square.

6. INTAKE AND EXHAUST VALVE OIL 
SEAL

Replace the oil seal with a new one, if the lip is
damaged or spring out of place, or when the surfac-
es of intake valve and valve seat are reconditioned
or intake valve guide is replaced.
1) Place the cylinder head on ST1.
2) Press in the oil seal as shown in the figure by us-
ing ST2.
ST1

498267600

CYLINDER HEAD TABLE

ST2

498857100

VALVE OIL SEAL GUIDE

NOTE:
• Apply engine oil to oil seal before force-fitting.
• Differentiate between the intake valve oil seal
and exhaust valve oil seal by noting their difference
in color.

Color of rubber part:

Intake [Black]
Exhaust [Brown]

Color of spring part:

Intake [Silver]
Exhaust [Silver]

7. VALVE LIFTER

1) Check the valve lifter visually.
2) Measure the outer diameter of valve lifter.

Outer diameter:

34.959 — 34.975 mm (1.3763 — 1.3770 in)

3) Measure the inner diameter of valve lifter mating
part on cylinder head.

Inner diameter:

34.994 — 35.016 mm (1.3777 — 1.3786 in)

NOTE:
If difference between outer diameter of valve lifter
and inner diameter of valve lifter mating part is over
the limit, replace the cylinder head.

Valve spring

Free length

44.67 mm (1.7587 in)

Tension/spring 
height

206 — 236 N
(21.0 — 24.1 kgf, 46.2 — 53.1 lb)
/36.0 mm (1.417 in)

485 — 537 N
(49.5 — 54.8 kgf, 109.2 — 120.6 lb)
/26.6 mm (1.047 in)

Squareness

2.5

°

, 2.0 mm (0.079 in)

ME-00132

ME-00133

ST2

ME-00134

ME-00135

ME(H4DOSTC)-69

MECHANICAL

CYLINDER HEAD ASSEMBLY

Standard:

0.019 — 0.057 mm (0.0007 — 0.0022 in)

Limit:

0.100 mm (0.0039 in)

F: DISPOSAL

CAUTION:
• Metallic sodium is enclosed in the exhaust
valve. Metallic sodium is extremely alkaline and
may produce severe chemical reactions. Full
consideration must therefore be given to the
following points when handing or disposing of
the valve.
• Since metallic sodium may cause blindness if
contacted with the eyes, burns if contacted with
the skin, and fire, do not deliberately take the
valve apart and remove the metallic sodium.
1) If the valve is damaged, remove the valve and
neutralize it by immersing it in water, and dispose
of it in the same way that general steel materials
are disposed of. The disposal method is described
in the following.

(1) Wearing rubber gloves, remove the dam-
aged valve from the cylinder head.
(2) Prepare a large receptacle (bucket or other
container) in a well ventilated location, and fill
the receptacle with water (at least 10 liters).
(3) Immerse the damaged valve in the recepta-
cle.

CAUTION:
A severe reaction may occur, so stand at least 2 
— 3 m from the receptacle. Because the reac-
tion will produce hydrogen gas, moreover, keep 
the receptacle away from sparks or flames.

(4) Once the reaction is completed (about 4 —
5 hours have elapsed), carefully remove the
valve using large pincers so that the reaction liq-
uid does not contact your skin, and dispose of it
with other parts that are being disposed of.
(5) The reaction liquid is a strong alkaline solu-
tion, so it must be disposed of in accordance
with local regulations.

CAUTION:
Make sure the reaction liquid does not contact 
your skin. If contact with skin occurs, immedi-
ately wash the affected area with large quanti-
ties of water.

ME-00633

ME(H4DOSTC)-70

MECHANICAL

CYLINDER BLOCK

20.Cylinder Block

A: REMOVAL

NOTE:
Before conducting this procedure, drain the engine
oil completely if applicable.
1) Remove the intake manifold. 
<Ref. to FU(H4DOSTC)-15, REMOVAL, Intake
Manifold.>
2) Remove the V-belt. <Ref. to ME(H4DOSTC)-42,
REMOVAL, V-belt.>
3) Remove the crankshaft pulley. 
<Ref. to ME(H4DOSTC)-44, REMOVAL, Crank-
shaft Pulley.>
4) Remove the belt cover. 
<Ref. to ME(H4DOSTC)-46, REMOVAL, Belt Cov-
er.>
5) Remove the timing belt assembly. 
<Ref. to ME(H4DOSTC)-47, REMOVAL, Timing
Belt Assembly.>
6) Remove the camshaft sprocket. 
<Ref. to ME(H4DOSTC)-55, REMOVAL, Camshaft
Sprocket.>
7) Remove the crankshaft sprocket. 
<Ref. to ME(H4DOSTC)-56, REMOVAL, Crank-
shaft Sprocket.>
8) Remove the generator and A/C compressor with
their brackets.
9) Remove the cylinder head assembly. 
<Ref. to ME(H4DOSTC)-62, REMOVAL, Cylinder
Head Assembly.>
10) Remove the clutch disc and cover. (MT vehi-
cles) <Ref. to CL-15, REMOVAL, Clutch Disc and
Cover.>
11) Remove the flywheel. (MT vehicles) 
<Ref. to CL-20, REMOVAL, Flywheel.>
12) Remove the drive plate. (AT vehicles)
Using the ST, lock crankshaft.
ST

498497100

CRANKSHAFT STOPPER

13) Remove the oil separator cover.
14) Remove the water by-pass pipe for heater.
15) Remove the oil filter.

16) Remove the oil cooler. (MT vehicles)

17) Removal of oil pan:

(1) Turn the cylinder block with #2 and #4 piston
sides facing upward.
(2) Remove the bolts which secure oil pan to
cylinder block.
(3) Insert a oil pan cutter blade between cylin-
der block-to-oil pan clearance, and then remove
the oil pan.
Do not use a screwdriver or similar tool in place
of oil pan cutter.

18) Remove the oil strainer stay.
19) Remove the oil strainer.
20) Remove the baffle plate.
21) Remove the water pipes.
22) Remove the water pump.

ME-00136

ST

(A) Gasket

(B) Oil cooler

(C) Oil cooler connector

ME-00634

( A )

( B )

( C )

ME-00137

ME(H4DOSTC)-71

MECHANICAL

CYLINDER BLOCK

23) Remove the oil pump from cylinder block.
Use a flat-bladed screwdriver as shown in the fig-
ure when removing the oil pump.

NOTE:
Be careful not to scratch the mating surface of cyl-
inder block and oil pump.

ME-00138

(1) Service hole plug

(3) Circlip

(5) Service hole cover

(2) Gasket

(4) Piston pin

(6) O-ring

ME-00139

( 1 )

( 2 )

( 3 )

( 3 )

( 4 )

( 4 )

( 5 )

( 6 )

( 1 )

( 2 )

( 3 )

( 4 )

( 1 )

( 2 )

( 3 )

( 4 )