Subaru Legacy IV (2008 year). Service manual — part 52

ME(H4SO)-4

General Description

MECHANICAL

Piston pin

Standard clearance between piston
and piston pin

mm (in) Standard

0.004 — 0.008 (0.0002 — 0.0003)

Degree of fit

Piston pin must be fitted into position with

thumb at 20°C (68°F).

Piston ring

Ring closed gap

mm (in)

Top ring

Standard

0.20 — 0.35 (0.0079 — 0.0138)

Second ring

Standard

0.37 — 0.52 (0.0146 — 0.0205)

Oil ring

Standard

0.20 — 0.50 (0.0079 — 0.0197)

Ring groove gap

mm (in)

Top ring

Standard

0.040 — 0.080 (0.0016 — 0.0031)

Second ring

Standard

0.030 — 0.070 (0.0012 — 0.0028)

Connecting
rod

Bend or twist per 100 mm (3.94 in)
in length

mm (in)

Service
limit

0.10 (0.0039)

Thrust clearance

mm (in) Standard

0.070 — 0.330 (0.0028 — 0.0130)

Bearing of
large end

Oil clearance

mm (in) Standard

0.016 — 0.044 (0.0006 — 0.0017)

Bearing size
(Thickness at center)

mm (in)

Standard

1.492 — 1.501 (0.0587 — 0.0591)

0.03 (0.0012) US

1.510 — 1.513 (0.0594 — 0.0596)

0.05 (0.0020) US

1.520 — 1.523 (0.0598 — 0.0600)

0.25 (0.0098) US

1.620 — 1.623 (0.0638 — 0.0639)

Bushing of
small end

Clearance between piston pin and bushing mm (in)

Standard

0 — 0.022 (0 — 0.0009)

Crankshaft

Bending limit

mm (in)

0.035 (0.0014)

Crank pin

Out-of-roundness

mm (in)

0.003 (0.0001)

Cylindricality

mm (in)

0.004 (0.0002)

Grinding limit (dia.)

mm (in)

To 51.750 (2.0374)

Crank journal

Out-of-roundness

mm (in)

0.005 (0.0002)

Cylindricality

mm (in)

0.006 (0.0002)

Grinding limit (dia.)

mm (in)

To 59.758 (2.3527)

Crank pin outer diameter

mm (in)

Standard

51.984 — 52.000 (2.0466 — 2.0472)

0.03 (0.0012) US

51.954 — 51.970 (2.0454 — 2.0461)

0.05 (0.0020) US

51.934 — 51.950 (2.0446 — 2.0453)

0.25 (0.0098) US

51.734 — 51.750 (2.0368 — 2.0374)

Crank journal outer diameter

mm (in)

Standard

59.992 — 60.008 (2.3619 — 2.3625)

0.03 (0.0012) US

59.962 — 59.978 (2.3607 — 2.3613)

0.05 (0.0020) US

59.942 — 59.958 (2.3599 — 2.3605)

0.25 (0.0098) US

59.742 — 59.758 (2.3520 — 2.3527)

Thrust clearance

mm (in) Standard

0.030 — 0.115 (0.0012 — 0.0045)

Oil clearance

mm (in) Standard

0.010 — 0.030 (0.0004 — 0.0012)

Main bearing

Bearing size
(Thickness at center)

mm (in)

#1, #3

Standard

1.998 — 2.011 (0.0787 — 0.0792)

0.03 (0.0012) US

2.017 — 2.020 (0.0794 — 0.0795)

0.05 (0.0020) US

2.027 — 2.030 (0.0798 — 0.0799)

0.25 (0.0098) US

2.127 — 2.130 (0.0837 — 0.0839)

#2, #4,
#5

Standard

2.000 — 2.013 (0.0787 — 0.0793)

0.03 (0.0012) US

2.019 — 2.022 (0.0795 — 0.0796)

0.05 (0.0020) US

2.029 — 2.032 (0.0799 — 0.0800)

0.25 (0.0098) US

2.129 — 2.132 (0.0838 — 0.0839)

ME(H4SO)-5

General Description

MECHANICAL

B: COMPONENT

1. TIMING BELT

(1)

Timing belt cover No. 2 RH

(10)

Belt idler No. 2

Tightening torque:N·m (kgf-m, ft-lb)

(2)

Timing belt guide (MT model)

(11)

Cam sprocket No. 2

T1: 5 (0.5, 3.7)

(3)

Crank sprocket

(12)

Timing belt

T2: 9.75 (1.0, 7.2)

(4)

Timing belt cover No. 2 LH

(13)

Front timing belt cover

T3: 24.5 (2.5, 18.1)

(5)

Cam sprocket No. 1

(14)

Timing belt cover LH

T4: 39 (4.0, 28.8)

(6)

Belt idler (A)

(15)

Crank pulley (MT model)

T5: 78 (8.0, 57.5)

(7)

Tensioner bracket

(16)

Crank pulley (AT model)

T6: <Ref. to ME(H4SO)-41, INSTAL-

LATION, Crank Pulley.>

(8)

Belt idler (B)

(9)

Automatic belt tension adjuster
ASSY

ME-03954

T5

T4

T1

T1

T6

T5

(5)

(6)

(8)

(9)

(11)

(10)

(14)

(15)

(12)

(13)

(7)

(4)

(1)

(2)

(3)

T1

T2

T1

T3

T4

T4

T1

T6

(16)

ME(H4SO)-6

General Description

MECHANICAL

2. CYLINDER HEAD AND CAMSHAFT

(1)

Rocker cover RH

(18)

Rocker cover LH

(31)

Seal washer

(2)

Intake valve rocker ASSY

(19)

Stud bolt

(3)

Exhaust valve rocker ASSY

(20)

Rocker cover gasket RH

Tightening torque:N·m (kgf-m, ft-lb)

(4)

Camshaft cap RH

(21)

Rocker cover gasket LH

T1: <Ref. to ME(H4SO)-59, INSTAL-

LATION, Cylinder Head.>

(5)

Oil seal

(22)

Oil switching solenoid valve RH

(6)

Camshaft RH

(23)

Oil switching solenoid valve holder
RH

T2: <Ref. to ME(H4SO)-52, INSTAL-

LATION, Valve Rocker Assem-
bly.>

(7)

Plug

(8)

Spark plug pipe gasket

(24)

Gasket

(9)

Cylinder head RH

(25)

Oil temperature sensor

T3: 9.75 (1.0, 7.2)

(10)

Cylinder head gasket

(26)

Variable valve lift diagnosis oil
pressure switch RH

T4: 18 (1.8, 13.3)

(11)

Cylinder head LH

T5: 25 (2.5, 18.4)

(12)

Camshaft LH

(27)

Oil switching solenoid valve LH

T6: 6.4 (0.7, 4.7)

(13)

Camshaft cap LH

(28)

Oil switching solenoid valve holder
LH

T7: 8 (0.8, 5.9)

(14)

Oil filler cap

T8: 10 (1.0, 7.4)

(15)

Gasket

(29)

Gasket

T9: 6 (0.6, 4.4)

(16)

Oil filler duct

(30)

Variable valve lift diagnosis oil
pressure switch LH

T10: 17 (1.7, 12.5)

(17)

O-ring

T11: 18 (1.8, 13.3)

ME-03453

(17)

(21)

(10)

(11)

(30)

(19)

(28) (27)

(29)

(12)

(13)

(14)

(15)

(16)

(18)

(3)

(31)

(8)

(5)

(1)

(2)

(3)

(4)

(8)

(8)

(6)

(7)

(26)

(24)

(23)

(22)

(7)

(10)

(19)

T2

T5

(5)

(9)

(20)

T4

T8

T7

(2)

T9

T5

T6

T1

T1

T8

T7

T3

T2

T3

T3

T4

T3

T4

T5

(25)

T10

T11

T10

ME(H4SO)-7

General Description

MECHANICAL

3. VALVE ROCKER ASSEMBLY

(1)

Intake valve rocker ASSY

(4)

Exhaust rocker shaft

Tightening torque:N·m (kgf-m, ft-lb)

(2)

Valve rocker nut

(5)

Exhaust valve rocker arm

T1: 6 (0.6, 4.4)

(3)

Valve rocker adjusting screw

T2: 9.75 (1.0, 7.2)

T3: 25 (2.5, 18.4)

(2)

(2)

(3)

(3)

(1)

(5)

(4)

(1)

T2

T3

T2

T1

T2

T3

ME-02691