JAC J2 User Manual



Maintenance Manual for J2 Sedan
Mechanical Part of Engine
82
③

Add
oil
to bearing surface
Install crankshaft on cylinder block. When rotating the crankshaft by hand, check whether the rotation
of crankshaft is smooth.
④
 Install main
bearing
cap.
■ The main
bearing
cap
can be identified through
mark.
■ Install
the
main
bearing
cap starting from
the
front of the engine according to the ordering
numbers.
■
Arrow
must
point
to
engine
front.
⑤

Tighten the bolts
of main bearing cap
to
standard torque.
a.
Apply new
engine oil
onto the
thread and
fixing surface of
bolts of
main bearing
cap.
b.
Tighten
bolts
for
main
bearing
cap
in
steps.
■
Tightening
torque:
35±2N·m
Screw all bearing cap bolts by 60-64° clockwise.
■
After inst
allatio
n of
bolts
of main bearing cap,
verify that
the
crankshaft
can b
e rota
ted smoothly by
hand.
■
Check
the
axial
clearance
of
crankshaft
.
See
“Axial
clearance
of
Crankshaft”.
⑥

Install piston onto
the
connecting rod
with
following instructions.
a.
Measure the
following lengths (See
right
Figure).
A
：
 Distance from piston flange to piston flange
outside
B
：
 Distance from piston flange to piston flange
inside
C
：

Length of pist
on pin.
D
：

Thickness of small end of conne
cting rod.
b.
Introdu
ce
the
measurements
into
following
formula:
L = [(A-C)-(B-D)]
／
2
c.
Insert push
rod
(special t
ool)
into
the
piston pin,
and
then
install
guide
sleeve.
d. When mounting
the
piston and
the
connecting rod,
keep the front marks at same side.
e.
Apply
the
engine
oil
onto
the
outer
circle
of pi
ston p
in.
f.
Starting
from the
guide sl
eeve, p
ress the
guide sle
eve, pi
ston pin
and pus
h rod
into th
e pisto
n front
Fig.1.1.072
Fig.1.1.071
P
i
s
t
o
n
P
i
n
P
i
s
t
o
n
Connecting
Rod

JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English