Subaru XT 1988 Service Manual page 200

2-3
ENGINE
4) Inspect connecting rod bearing for scar, peeling, seizure,
melting, wear, etc.
5) Measure the oil clearance on individual connecting rod
bearings by means of plastigauge according to the following
procedure.
(1) Wipe off oil, dust. etc. on the surfaces to be measured.
(2) Cut the plastigauge to the width of the bearing, place
it on the crank pin parallel with the crankshaft axis, and
install connecting rod. Tighten connecting rod nuts to
41 N'm (4.2 kg-m, 30 ft-Ib).
During this measurement, do not allow relative movement
between the crankpin and connecting rod.
(3) Remove connecting rod and measure the width of the
plastigauge with the scale printed on the plastigauge case.
If any oil clearance is not within specification, replace the
defective bearing with a new one of standard size or
undersize as necessary, and replace or recondition the
crankshaft as necessary. (See the table below.)
Connecting rod oil clearance:
Standard
0.010 - 0.054
mm
(0.0004 - 0.0021 in)
Limit
0.10 mm (0.0039 in)
Connecting rod bearing
Bearing size
Thickness at center
of bearing
Standard
1 .485 - 1.490 mm
(0.0585 - 0.0587 in)
0.03 mm (0.0012 in) undersize
1.500 - 1.505 mm
(0.0591 - 0.0593 in)
0.05 mm (0.0020 in) undersize
1.510 -1.515 mm
(0.0594 - 0.0596 in)
0.25 mm (0.0098 in) undersize
1.610 -1.615 mm
(0.0634 - 0.0636 in)
44
Fig. 101
6) Inspect bushing at connecting rod small end. and replace
if worn or damaged. Also measure the piston pin clearance at
the connecting rod small end.
Standard clearance between piston pin and bushing in
connecting rod:
o -
0.022 mm (0 - 0.0009 in)
Replacement procedure is as follows.
(1) Remove bushing from connecting rod with
REMOVER
&
REPLACER (499037000) and press.
(2) Press bushing with REMOVER & REPLACER
(499037000) after applying oil on the periphery of
bushing.
(3) Make two 3 mm (0.12 in) holes in bushing.
Ream the inside of bushing.
Bushing bore:
21.000 - 21.016 mm (0.8268 - 0.8274 in)
(4) After completion of reaming, clean bushing to
remove ch ips.
CRANKSHAFT AND CRANKSHAFT BEARING
1) Clean crankshaft completely and check for cracks by
means of red check etc., and replace if defective.
2) Measure the crankshaft bend, and correct or replace if it
exceeds the limit.
When measuring, place both the front and rear journals on
blocks located on a surface plate, and apply a dial gauge to the
center journal.
Crankshaft bend limit:
0.035
mm
(0.0014 in)