Subaru Legacy IV (2008 year). Manual - part 67

ME(H4SO)-64

Cylinder Head

MECHANICAL

(2) Insert the ST2 into valve guide and press it
down to remove the valve guide.

ST1

498267800

CYLINDER HEAD TABLE

ST2

499767200

VALVE GUIDE REMOVER

(3) Turn the cylinder head upside down and
place the ST as shown in the figure.

Intake side
ST

499767700

VALVE GUIDE ADJUSTER

Exhaust side
ST

499767800

VALVE GUIDE ADJUSTER

(4) Before installing a new valve guide, make sure
that neither scratches nor damages exist on the in-
ner surface of valve guide holes in cylinder head.
(5) Put a new valve guide, coated with sufficient
oil, in cylinder, and insert the ST1 into valve
guide. Press in until the valve guide upper end
is flush with the upper surface of ST2.

ST1

499767200

VALVE GUIDE REMOVER

Intake side
ST2

499767700

VALVE GUIDE ADJUSTER

Exhaust side
ST2

499767800

VALVE GUIDE ADJUSTER

(6) Check the valve guide protrusion.

Valve guide protrusion L:

Intake

20.0 — 21.0 mm (0.787 — 0.827 in)

Exhaust

16.5 — 17.5 mm (0.650 — 0.689 in)

(7) Ream the inside of valve guide using ST.
Put the ST in valve guide, and rotate the ST
slowly clockwise while pushing it lightly. Bring
the ST back while rotating it clockwise.

NOTE:
• Apply engine oil to the ST when reaming.
• If the inner surface of valve guide is damaged,
the edge of ST should be slightly ground with oil
stone.
• If the inner surface of valve guide becomes lus-
trous and the ST does not chip, use a new ST or
remedy the ST.
ST

499767400

VALVE GUIDE REAMER

(8) After reaming, clean the valve guide to re-
move chips.
(9) Recheck the contact condition between
valve and valve seat after replacing the valve
guide.

(A) Valve guide

ME-00290

ST2

ST1

(A)

ME-00291

ST

ST2

ME-00292

ST1

(A) Valve guide

ME-00293

(A)

L

ME-00294

ME(H4SO)-65

Cylinder Head

MECHANICAL

4. INTAKE AND EXHAUST VALVE

1) Inspect the flange and stem of valve, and re-
place the valve with a new part if damaged, worn,
deformed, or if “H” exceeds the specified limit.

Head edge thickness H:

Intake (A)

Standard:

0.8 — 1.2 mm (0.03 — 0.047 in)

Exhaust (B)

Standard:

1.0 — 1.4 mm (0.039 — 0.055 in)

2) Put a small amount of grinding compound on the
seat surface, and lap the valve and seat surface.
Replace with a new valve oil seal after lapping.

NOTE:
It is possible to differentiate between the intake
valve and the exhaust valve by their overall length.

Valve overall length:

Intake

120.6 mm (4.75 in)

Exhaust

121.7 mm (4.79 in)

5. VALVE SPRING

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

ME-00758

H

H

(B)

(A)

Free length

mm (in) 55.2 (2.173)

Tension/spring 
height 
N (kgf, lbf)/mm (in)

Set

235.3 — 270.7 (24 — 27.6, 
52.9 — 60.8)/45.0 (1.772)

Lift

578.9 — 639.9 (59.1 — 65.3, 
130.3 — 143.9)/34.7 (1.366)

Squareness

2.5°, 2.4 mm (0.094 in) or less

ME-00283

ME(H4SO)-66

Cylinder Head

MECHANICAL

6. INTAKE AND EXHAUST VALVE OIL SEAL

1) For the following, replace the oil seal with a new
part.
See the procedure 2) and subsequent for replace-
ment procedures.
• When the lip is damaged.
• When the spring is out of the specified position.
• When readjusting the surfaces of valve and
valve seat.
• When replacing the valve guide.
2) Place the cylinder head on the ST1, and press-fit
the oil seal using the ST2.
ST1

498267800

CYLINDER HEAD TABLE

ST2

498857100

VALVE OIL SEAL GUIDE

NOTE:
• Apply engine oil to oil seal before press-fitting.
• When press-fitting the oil seal, do not use a ham-
mer, etc. or strike in.
• The intake valve oil seals and exhaust valve oil
seals are distinguished by their colors.

Color of rubber part:

Intake [Gray]
Exhaust [Green]

ME-00284

ST1

ST2

ME(H4SO)-67

Cylinder Block

MECHANICAL

21.Cylinder Block

A: REMOVAL

NOTE:
Before conducting this procedure, drain the engine
oil completely.
1) Remove the V-belts. <Ref. to ME(H4SO)-38,
REMOVAL, V-belt.>
2) Remove the intake manifold. <Ref. to
FU(H4SO)-13, REMOVAL, Intake Manifold.>
3) Remove the crank pulley. <Ref. to ME(H4SO)-
41, REMOVAL, Crank Pulley.>
4) Remove the timing belt cover. <Ref. to
ME(H4SO)-43, REMOVAL, Timing Belt Cover.>
5) Remove the timing belt. <Ref. to ME(H4SO)-44,
REMOVAL, Timing Belt.>
6) Remove the crank sprocket. <Ref. to
ME(H4SO)-50, REMOVAL, Crank Sprocket.>
7) Remove the generator and A/C compressor with
their brackets.
8) Remove the cylinder head. <Ref. to ME(H4SO)-
58, REMOVAL, Cylinder Head.>
9) Remove the clutch disc and cover. (MT model)
<Ref. to CL-13, REMOVAL, Clutch Disc and Cov-
er.>
10) Remove the flywheel. (MT model) <Ref. to CL-
16, REMOVAL, Flywheel.>
11) Use the ST to lock the crankshaft, and remove
the drive plate. (AT model)
ST

498497100

CRANKSHAFT STOPPER

12) Remove the oil separator cover.
13) Remove the water by-pass pipe for heater.
14) Remove the water pump. <Ref. to CO(H4SO)-
15, REMOVAL, Water Pump.>

15) Remove the bolts which install oil pump onto
cylinder block.

NOTE:
When disassembling and checking the oil pump,
loosen the relief valve plug before removing the oil
pump.

16) Remove the oil pump from cylinder block using
a flat tip screwdriver.

CAUTION:
Be careful not to scratch the mating surface of
cylinder block and oil pump.

17) Remove the front oil seal from the oil pump.
18) Remove the oil pan.

(1) Set the part so that the cylinder block LH is
on the upper side.
(2) Remove the bolts which secure oil pan to
cylinder block.
(3) Insert an oil pan cutter blade between cylin-
der block-to-oil pan clearance and remove the
oil pan.

CAUTION:
Do not use a screwdriver or similar tools in
place of oil pan cutter.
19) Remove the oil strainer.
20) Remove the baffle plate.
21) Remove the oil filter. <Ref. to LU(H4SO)-23,
REMOVAL, Engine Oil Filter.>

ME-00298

LU-00015

ME-00138