JAC J2 - Page 82



Maintenance Manual for J2 Sedan
Mechanical Part of Engine
81
⑮
 Flywheel
Check whether the flywheel and the signal disk are distorted or cracked.
Attention:
■
Do
not
disassemb
le
the
flywheel.
○
󰀱󰀶

Crankshaft signal wheel
Check whether the crank signal wheel has
distortions, cracks and other anomalies.
Check whether the bolts are loose
3) Assembly
①

Blow away any
oil and
coolant from the
cylinder body, the
cylinder bore and
the crankcase.
Remove any foreign bodies.
Attention:
■
Use
goggles
to
protect
your
eyes.
②
 Install the upper and lower main
bearings shells.
Attention:
■
Select
the bea
ring
shells
by us
ing
the identif
ication
marks of
crankshaft (See
the tabl
e bel
ow).
If the crankshaft can not be identified, measure the diameter of crankshaft, and then select
the corresponding bearing shell to match the crankshaft.
Crankshaft group marking
Main bearing
Hole group marking
1
2
3
4
5
0
(up / down)

Black
／
Black Black
／
Yellow Black
／
Red
Black
／
White Black
／
Purple
1
(up / down)

Yellow
／
Black Yellow
／
Yellow
Yellow
／
Red Yellow
／
White
Yellow
／
Purple
2
(up / down)

Red
／
Black Red
／
Yellow Red
／
Red
Red
／
White Red
／
Purple
a.
Remove any
dust, dirt
and
oil
from the
matching surfaces
of cylinder
body and
main
bearing cap.
b. Install intermediate and upper bearing shells on
the
cylinder body
c.
Be
aware
of
direction
of
bearing shell
during the
installation.
■
Bearings shells
with oil
holes and
slots should
be
installed at
block side;
other shells
should be
installed at the main bearing cap side.
■
For
installation of
bearings, clean
before
installation. Please
apply
engine oil
to
the
bearing surface.
Do not use oil on the back, but to thoroughly clean it.
■
During insta
llation, align
the e
xtrusion
on bea
ring shell
with th
e cu
t of c
ylinder body and main
bearing cap.

Fig.1.1.070