Subaru Legacy III (2000-2003 year). Manual - part 266

ME(H6DO)-52

MECHANICAL

CAMSHAFT

(2) Tighten the rocker cover bolts in the numer-
ical order shown in the figure.

Tightening torque:

6.4 N·m (0.64 kgf-m, 4.6 ft-lb)

4) Install rear chain cover. <Ref. to ME(H6DO)-48,
INSTALLATION, Rear Chain Cover.>
5) Install crankshaft sprocket. <Ref. to ME(H6DO)-
47, INSTALLATION, Crankshaft Sprocket.>
6) Install camshaft sprockets. <Ref. to ME(H6DO)-
46, INSTALLATION, Camshaft Sprocket.>
7) Install timing chain assembly. <Ref. to
ME(H6DO)-42, INSTALLATION, Timing Chain As-
sembly.>
8) Install front chain cover. <Ref. to ME(H6DO)-39,
INSTALLATION, Front Chain Cover.>
9) Install crankshaft pulley. <Ref. to ME(H6DO)-38,
INSTALLATION, Crankshaft Pulley.>

C: INSPECTION

1. CAMSHAFT

1) Measure the bend, and repair or replace if nec-
essary.

Limit:

0.020 mm (0.0008 in)

2) Check journal for damage and wear. Replace if
faulty.
3) Measure outside diameter of camshaft journal. If
the journal diameter is not as specified, check the
oil clearance.

4) Measurement of the camshaft journal oil clear-
ance

(1) Clean the bearing caps and camshaft jour-
nals.
(2) Place the camshafts on the cylinder head.
(3) Place plastigauge across each of the cam-
shaft journals.
(4) Install the bearing caps.

NOTE:
Do not turn the camshaft.

(5) Remove the bearing caps.

ME-00538

FRONT

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( 9 )

(10)

(11)

Camshaft journal

Front

Center, rear

Standard

37.946 — 37.963 mm
(1.4939 — 1.4946 in)

27.946 — 27.963 mm
(1.1002 — 1.1009 in)

ME-00539

ME(H6DO)-53

MECHANICAL

CAMSHAFT

(6) Measure the widest point of the plastigauge
on each journal.
If the oil clearance exceeds the limit, replace the
camshaft. If necessary, replace the camshaft
caps and cylinder head as a set.

Standard oil clearance:

0.037 — 0.072 mm (0.0015 — 0.0028 in)

Limit:

0.10 mm (0.0039 in)

(7) Completely remove the plastigauge.

5) Check cam face condition; remove minor faults
by grinding with oil stone. Measure the cam height
H; replace if the limit has been exceeded.

Cam height: H

Standard:

Intake:

45.75 — 45.85 mm (1.8012 — 1.8051 in)

Exhaust:

45.25 — 45.35 mm (1.7815 — 1.7854 in)

Limit:

Intake:

45.65 mm (1.7972 in)

Exhaust:

45.15 mm (1.7776 in)

Cam base circle diameter A:

36.0 mm (1.4173 in)

6) Measure the thrust clearance of camshaft with
dial gauge. If the clearance exceeds the limit, re-
place caps and cylinder head as a set. If necessary
replace camshaft.

Standard:

Intake:

0.075 — 0.135 mm (0.0030 — 0.0053 in)

Exhaust:

0.048 — 0.108 mm (0.0019 — 0.0043 in)

Limit:

Intake:

0.155 mm (0.0061 in )

Exhaust:

0.130 mm (0.0051 in)

ME-00540

ME-00541

ME-00542

ME(H6DO)-54

MECHANICAL

CYLINDER HEAD ASSEMBLY

17.Cylinder Head Assembly

A: REMOVAL

1) Remove crankshaft pulley. <Ref. to ME(H6DO)-
38, REMOVAL, Crankshaft Pulley.>
2) Remove front chain cover. <Ref. to ME(H6DO)-
39, REMOVAL, Front Chain Cover.>
3) Remove timing chain assembly. <Ref. to
ME(H6DO)-41, REMOVAL, Timing Chain Assem-
bly.>
4) Remove camshaft sprockets. <Ref. to
ME(H6DO)-46, REMOVAL, Camshaft Sprocket.>
5) Remove crankshaft sprocket. <Ref. to
ME(H6DO)-47, REMOVAL, Crankshaft Sprocket.>
6) Remove rear chain cover. <Ref. to ME(H6DO)-
48, REMOVAL, Rear Chain Cover.>
7) Remove camshafts. <Ref. to ME(H6DO)-50,
REMOVAL, Camshaft.>
8) Remove cylinder head bolts in numerical se-
quence shown in figure.

NOTE:
Leave bolts (2) and (4) engaged by three or four
threads to prevent cylinder head from falling.

9) Tap cylinder head with a plastic hammer to sep-
arate it from cylinder block.
10) Remove bolts (2) and (4) to remove cylinder
head.

11) Remove cylinder head gasket.

NOTE:
Do not scratch the mating surface of cylinder head
and cylinder block.
12) Similarly, remove right side cylinder head.

B: INSTALLATION

1) Install cylinder head and gaskets on cylinder
block.

NOTE:
• Use new cylinder head gaskets.
• Be careful not to scratch the mating surface of
cylinder block and oil pump.
2) Tighten cylinder head bolts.

(1) Coat the washers and threaded parts of the
cylinder head bolts with engine oil.
(2) Install the cylinder head on the cylinder
block and tighten the bolts in the numerical order
shown in the figure to a tightening torque of 20
N·m (2.0 kgf-m, 14 ft-lb).
(3) Tighten the bolts in the numerical order
shown in the figure to a tightening torque of 50
N·m (5.1 kgf-m, 37 ft-lb).
(4) Loosen all the bolts in 2 stages, 180

at a

time, in the reverse order of tightening.
(5) Tighten the bolts in the numerical order
shown in the figure to a tightening torque of 25
N·m (2.5 kgf-m, 18 ft-lb).
(6) Tighten the bolts in the numerical order
shown in the figure to a tightening torque of 25
N·m (2.5 kgf-m, 18 ft-lb).
(7) Tighten all the bolts 90

in the numerical or-

der shown in the figure.
(8) Tighten the (1) to (4) bolts 90

again in the

numerical order shown in the figure.
(9) Tighten the (5) to (8) bolts 45

again in the

numerical order shown in the figure.

3) Install camshafts. <Ref. to ME(H6DO)-50, IN-
STALLATION, Camshaft.>
4) Install rear chain cover. <Ref. to ME(H6DO)-48,
INSTALLATION, Rear Chain Cover.>
5) Install crankshaft sprocket. <Ref. to ME(H6DO)-
47, INSTALLATION, Crankshaft Sprocket.>
6) Install camshaft sprockets. <Ref. to ME(H6DO)-
46, INSTALLATION, Camshaft Sprocket.>
7) Install timing chain assembly. <Ref. to
ME(H6DO)-42, INSTALLATION, Timing Chain As-
sembly.>
8) Install front chain cover. <Ref. to ME(H6DO)-39,
INSTALLATION, Front Chain Cover.>

ME-00543

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ME-00543

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ME-00544

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ME(H6DO)-55

MECHANICAL

CYLINDER HEAD ASSEMBLY

9) Install crankshaft pulley. <Ref. to ME(H6DO)-38,
INSTALLATION, Crankshaft Pulley.>

C: DISASSEMBLY

1) Place cylinder head on ST.
ST

18250AA000

CYLINDER HEAD TABLE

2) Remove valve shims and valve lifters.
3) Set ST on valve spring retainer. Compress valve
spring and remove the valve spring retainer key.
Remove each valve and valve spring.
ST

499718000

VALVE SPRING REMOVER

NOTE:
• For correct re-installation, keep removed parts in
order in their original positions.
• Mark each valve to prevent confusion.
• Use extreme care not to damage the lips of the
intake valve oil seals and exhaust valve stem seals.

D: ASSEMBLY

1) Installation of valve spring and valve

(1) Place cylinder head on ST.

18250AA000

CYLINDER HEAD TABLE

(2) Coat stem of each valve with engine oil and
insert valve into valve guide.

NOTE:
When inserting valve into valve guide, use special
care not to damage the stem seal lip.

(3) Install valve spring and retainer.

NOTE:
• Be sure to install the valve springs with their
close-coiled end facing the seat on the cylinder
head.
• Install valve spring with the painted surface fac-
ing the retainer side.

(4) Set ST on valve spring.

499718000

VALVE SPRING REMOVER

(5) Compress valve spring and fit valve spring
retainer key.
(6) After installing, tap valve spring retainers
lightly with wooden hammer for better seating.

2) Apply oil to the surface of the valve lifter and
valve shim.
3) Install valve lifter and valve shim.

ME-00545

(1) Seat

(2) Valve spring

(3) Retainer

(4) Painted face

ME-00546

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ME-00545

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