Maintenance Manual for J2 Sedan
Mechanical Part of Engine
80
Standard value: 0.02 - 0.04mm + (0.01mm) expansion
Limit:0.1mm
⑬
Roundness and Cylindricality of Crankshaft
Measure sizes of each main crankshaft journal and
main connecting rod journal at four different
positions as shown in the figure.
■
The difference between “X” and “Y” of “A”
and “B” represents the roundness.
■
The difference between “A” and “B” of “X”
and “Y” represents the cylindricality.
Limits: For roundness: equal to or less than 0.05mm
For cylindricality: equal to or less than 0.05mm
Calibrate or replace the crankshaft if the measurements exceed the limits.
⑭
Clearance of Crankshaft
a. Wipe off oil from the crankshaft journal and the inner surface of bearing shell.
b. Mount the bearing shell.
c.
Set the plastic divicer till its width equals to the width of bearing shell. Then put them on the
journal along the axial line of journal.
d.
Lightly mount the crankshaft bearing shell cover, and screw the bolt till to specified torque.
e.
Dismount the bolt and lightly take off the crankshaft bearing shell cover.
f.
Measure the pressed portion of plastic divider at
the widest point by the scale which is printed on
the plastic wire gauge bag.
Standard values: 0.02-0.04mm
Limit:0.1mm
Attention:
■
The connecting rod journal and main
journal of crankshaft should be rolled but
needn't to be machined to the reduced size.
Fi .1.1.067
Fig.1.1.068
Fig.1.1.069
Plastic Wire
Gauge
Round-angle Rolling Area
