Subaru Legacy IV (2008 year). Manual - part 256
ME(H4DOTC)-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 — 0.25 (0.0079 — 0.0098)
Second ring
Standard
0.37 — 0.52 (0.015 — 0.0203)
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
0.1 (0.0039)
Thrust clearance
mm (in) Standard
0.070 — 0.330 (0.0028 — 0.0130)
Bearing of
large end
Oil clearance
mm (in) Standard
0.017 — 0.045 (0.0007 — 0.0018)
Bearing size
(Thickness at center)
mm (in)
Standard
1.490 — 1.502 (0.0587 — 0.0591)
0.03 (0.0012) US
1.504 — 1.512 (0.0592 — 0.0595)
0.05 (0.0020) US
1.514 — 1.522 (0.0596 — 0.0599)
0.25 (0.0098) US
1.614 — 1.622 (0.0635 — 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 (2.0447 — 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)