Crankshaft journal bearings
Inspect the bearing shells for signs of fusion, pitting, burn or flak-
ing and observe the contact pattern. Defective shells must be re-
placed.
CAUTION:
As in the case of connecting-rod bearings, the journal
bearing shells are not meant to be repaired by scrap-
ing or grinding with sandpaper or by any machining.
Journal-to-bearing clearance:
Check this clearance by using gaging plastic. The following
method is based on the use of gaging plastic:
1) Cut the gaging plastic stock to the required length (equal to
the width of the bearing), and place it axially on the journal,
avoiding the oil hole.
2) Mount the crankshaft in the usual manner, tightening the
bearing caps to the specified torque value. (It is assumed that
a gaging plastic piece is pinched at each journal.)
Do not rotate the crankshaft when gaging plastic is in.
Tightening Torque
(a): 46 N·m (4.6 kg-m, 33.5 Ib-ft)
CAUTION:
Each of the four bearing caps has an arrow marked
on it. Be sure to position each cap with its arrow
pointing to crankshaft pulley side and to match it
(by the cylinder number) to its journal. Remember,
the three cylinders are numbered, 1, 2 and 3, as
counted from crankshaft pulley side.
“A” : Crankshaft pulley side
“B” : Flywheel side
3) Remove the caps. By referring to the envelop scale, measure
the width of the widest part of the piece, and determine wheth-
er the radial clearance checked (obtained from the gaging
plastic piece) is within the limit.
ENGINE MECHANICAL (F8B ENGINE)
6A-31
Item
Standard
Limit
Journal-to-bearing
clearance
0.020 – 0.040 mm
(0.0008 – 0.0016 in.)
0.080 mm
(0.003 in.)
