Subaru 2004 Automobile User Manual


 
ME(H4DOTC)-12
MECHANICAL
General Description
Cylinder
block
Surface warpage limit (mating with cylinder head) 0.05 mm (0.0020 in)
Surface grinding limit 0.1 mm (0.004 in)
Cylinder bore STD
A 92.005 92.015 mm (3.6222 3.6226 in)
B 91.995 92.005 mm (3.6218 3.6222 in)
Taper
STD 0.015 mm (0.0006 in)
Limit 0.050 mm (0.0020 in)
Out-of-roundness
STD 0.010 mm (0.0004 in)
Limit 0.050 mm (0.0020 in)
Piston clearance
STD 0.010 0.030 mm (0.0004 0.0012 in)
Limit 0.050 mm (0.0020 in)
Enlarging (boring) limit 0.5 mm (0.020 in)
Piston Outer diameter
STD
A 91.985 91.995 mm (3.6214 3.6218 in)
B 91.975 91.985 mm (3.6211 3.6214 in)
0.25 mm (0.0098 in)
OS
92.225 92.235 mm (3.6309 3.6313 in)
0.50 mm (0.0197 in)
OS
92.475 92.485 mm (3.6407 3.6411 in)
Piston pin
Standard clearance between piston
pin and hole in piston
STD 0.004 0.008 mm (0.0002 0.0003 in)
Limit 0.020 mm (0.0008 in)
Degree of fit
Piston pin must be fitted into position with thumb at 20°C
(68°F).
Piston ring
Piston ring gap
Top ring
STD 0.20 0.25 mm (0.0079 0.0098 in)
Limit 1.0 mm (0.039 in)
Second
ring
STD 0.40 0.50 mm (0.016 0.020 in)
Limit 1.0 mm (0.039 in)
Oil ring
STD 0.20 0.50 mm (0.0079 0.020 in)
Limit 1.5 mm (0.059 in)
Clearance between piston
ring and piston ring
groove
Top ring
STD 0.040 0.080 mm (0.0016 0.0031 in)
Limit 0.15 mm (0.0059 in)
Second
ring
STD 0.030 0.070 mm (0.0012 0.0028 in)
Limit 0.15 mm (0.0059 in)
Connecting
rod
Bend or twist per 100 mm (3.94 in) in
length
Limit 0.10 mm (0.0039 in)
Side clearance
STD 0.070 0.330 mm (0.0028 0.0130 in)
Limit 0.4 mm (0.016 in)
Connecting
rod bearing
Oil clearance
STD 0.020 0.046 mm (0.0008 0.0018 in)
Limit 0.05 mm (0.0020 in)
Thickness at center portion
STD 1.486 1.498 mm (0.0585 0.0590 in)
0.03 mm
(0.0012
in) US
1.504 1.512 mm (0.0592 0.0595 in)
0.05 mm
(0.0020
in) US
1.514 1.522 mm (0.0596 0.0599 in)
0.25 mm
(0.0098
in) US
1.614 1.622 mm (0.0635 0.0639 in)
Connecting
rod bushing
Clearance between piston pin and
bushing
STD 0 0.022 mm (0 0.0009 in)
Limit 0.030 mm (0.0012 in)