Subaru 2002 IMPREZA Service Manual page 194

CYLINDER BLOCK
MECHANICAL
Bearing size
(Thickness at cen-
ter)
5. CONNECTING ROO
1) Replace the connecting rod, if the large or small
end thrust surface is damaged.
2) Check for bend or twist using a connecting rod
aligner. Replace the connecting rod if the bend or
twist exceeds the limit.
Limit of bend or twist per 100 mm (3.94 in) in
length:
0.10 mm (0.0039 in)
Outer diameter of
crank pin
n
B2M1184B
(A) Thickness gauge
(B) Connecting rod
3) Install the connecting rod fitted with bearing to
crankshaft and measure the side clearance (thrust
clearance). Replace the connecting rod if the side
clearance exceeds the specified limit.
Connecting rod side clearance:
Standard
Limit
0.070
-
0.330 mm (0.0028
-
0.0130 in)
0.4 mm (0.016 in)
4) Inspect the connecting rod bearing for scar,
peeling, seizure, melting, wear, etc.
5) Measure the oil clearance on individual connect-
ing rod bearings by means of plastigauge. If any oil
clearance is not within specification, replace the
defective bearing with a new one of standard size
or undersize as necessary. (See the table below.)
Connecting rod oil clearance:
Standard
Limit
0.020
-
0.046 mm (0.0008
-
0.0018 in)
0.05 mm (0.0020 in)
I
Unit: mm (in)
I
I
Bearing I
Standard
(0.001 2)
(0.0020)
undersize
undersize
(0.0098)
undersize
1.492
-
1.501 47.984
-
48.000
1.510-1.513 47.954
-
47.970
1.520
-
1.523 47.934
-
47.950
1.620
-
1.623 47.734
-
47.750
ME( DOH C TU R BO)-88