Subaru Impreza 2002 Service Manual page 970

6. CRANKSHAFT AND CRANKSHAFT
BEARING
1) Clean the crankshaft completely and check for
cracks by means of red lead check etc., and re-
place if defective.
2) Measure the crankshaft bend, and correct or re-
place if it exceeds the limit.
CAUTION:
If a suitable V-block is not available, install the
#1 and #5 crankshaft bearing on cylinder block,
position the crankshaft on these bearings and
measure the crankshaft bend using a dial
gauge.
Crankshaft bend limit:
0.035 mm (0.0014 in)
Journal
O.D. (2.3619 — 2.3625)
Bearing
Standard
size
(Thickness (0.0787 — 0.0792)
at center)
Journal
O.D. (2.3607 — 2.3613)
0.03
Bearing
(0.0012)
size
undersize
(Thickness (0.0794 — 0.0795)
at center)
Journal
O.D. (2.3599 — 2.3605)
0.05
Bearing
(0.0020)
size
undersize
(Thickness (0.0798 — 0.0799)
at center)
Journal
O.D. (2.3520 — 2.3527)
0.25
Bearing
(0.0098)
size
undersize
(Thickness (0.0837 — 0.0839)
at center)
O.D. : Outer Diameter
CYLINDER BLOCK
EN0339
Crank journal diameter
#1, #3 #2, #4, #5
59.992 — 60.008 59.992 — 60.008
(2.3619 — 2.3625)
1.998 — 2.011 2.000 — 2.013
(0.0787 — 0.0793)
59.962 — 59.978 59.962 — 59.978
(2.3607 — 2.3613)
2.017 — 2.020 2.019 — 2.022
(0.0795 — 0.0796)
59.942 — 59.958 59.942 — 59.958
(2.3599 — 2.3605)
2.027 — 2.030 2.029 — 2.032
(0.0799 — 0.0800)
59.742 — 59.758 59.742 — 59.758
(2.3520 — 2.3527)
2.127 — 2.130 2.129 — 2.132
(0.0838 — 0.0839)
3) Inspect the crank journal and crank pin for wear.
If they are not within the specifications, replace the
bearing with a suitable (undersize) one, and then
replace or recondition the crankshaft as necessary.
When grinding the crank journal or crank pin, finish
them to specified dimensions according to the un-
dersize bearing to be used.
Crank pin and crank journal:
Out-of-roundness
0.020 mm (0.0008 in) or less
Taper limit
0.07 mm (0.0028 in)
Grinding limit
0.250 mm (0.0098 in)
1600 cc
47.984 — 48.000
(1.8891 — 1.8898)
1.492 — 1.510
(0.0587 — 0.0594)
47.954 — 47.970
(1.8879 — 1.8886)
1.510 — 1.513
(0.0594 — 0.0596)
47.934 — 47.950
(1.8872 — 1.8878)
1.520 — 1.523
(0.0598 — 0.0600)
47.734 — 47.750
(1.8793 — 1.8799)
1.620 — 1.623
(0.0638 — 0.0639)
ME-93
MECHANICAL
G2M0179
Unit: mm (in)
Crank pin diameter
2000 cc 2500 cc
51.984 — 52.000 51.984 — 52.000
(2.0466 — 2.0472) (2.0466 — 2.0472)
1.492 — 1.501 1.490 — 1.502
(0.0587 — 0.0591) (0.0587 — 0.0591)
51.954 — 51.970 51.954 — 51.970
(2.0454 — 2.0461) (2.0454 — 2.0461)
1.510 — 1.513 1.504 — 1.512
(0.0594 — 0.0596) (0.0592 — 0.0595)
51.934 — 51.950 51.934 — 51.950
(2.0446 — 2.0453) (2.0446 — 2.0453)
1.520 — 1.523 1.514 — 1.522
(0.0598 — 0.0600) (0.0596 — 0.0599)
51.734 — 51.750 51.734 — 51.750
(2.0368 — 2.0374) (2.0368 — 2.0374)
1.620 — 1.623 1.614 — 1.622
(0.0638 — 0.0639) (0.0635 — 0.0639)