JAC J2 User Manual



Maintenance Manual for J2 Sedan
Mechanical Part of Engine
66
2) Check after
Dismantlement
①

Cylinder
head
Bolt
Measure the length of cylinder head bolt.
■
Limit: 143.5±0.7mm.
Replace
the
cylinder head
bolt
if
this Limit
is
exceeded.
②

Cylinder
head
■ Check
whether
there
are cracks or
other
damages on
the
cylinder head.
■ Check whether
there
is any blockage in
the
coolant gallery
and
oil
passage. If
any, clean the coolant
gallery and oil
passage.
■ Check
planeness
of
cylinder
head.
Note: Che
ck the pl
aneness
of cylinder body a
s well when perform
ing this che
ck.
a.
Wipe
off the
engine oil
from the
cylinder head,
remove any
sealant and
the
carbon deposit.
Attention:
■
Be car
eful to
prevent
impurities
from
falling
into coolant
gallery
and oil
passage
of cyl
inder
head.
b.
Measure
the
planeness
in
six
directions
at
several positions on bottom surface of
cylinder head.
Standard value: below 0.03mm
Height of cylinder head (new): 113±0.1mm
If the the standard value is exceeded, grind or
replace the cylinder head according to the
specification.
Attention:
■ The total
grindable
margin o
f matching
surface
between cyl
inder
head a
nd cylinder
body
should not be greater than 0.2mm.
3) Installation
①

Install
new
cylinder
gasket.
②

Follow
the nu
merical order as shown in the
diagram to tighten the cylinder head bolt and
follow the given steps to install cylinder head.
A:
Intake side
B:
Exhaust
side
: Front end of engine
a.
Install
washer.
Fig.1.1.042
Fig. 1.1.041

JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English