JAC J2 User Manual

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Maintenance Manual for J2 Sedan
Mechanical Part of Engine
67
b.
Apply a
film of
engine oil
onto washer,
which is
at the
threaded portion
of bolt.
c.
Tighten
cylinder head
bolts in
sequence, until
each bolt
torque is
24.5 ±
2
N •
m.
d.
Fully
unscrew
bolts.
e. Tighten
the bolts
until the
torque of each
bolt is
24.5 ±
2N •
m.
f.
Paint
marks
on
the
bolt
head
and
the
cylinder
head (see Fig.1.1.040).
g.
Screw
each
bolt
for more
90° w
ith t
o th
e
tightening sequence.
h.
Re-tighten
each
bolt
by
90°.
Attention:
■
When the two tightening angles are below
180 °, tightening performance can not be
assured; be sure to reach 180 ° when
tightening.
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■
When the two tightening angles are above 184 °, completely loosen the bolt and re-tighten per
the initial sequence.
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i.
If the
old
cylinder head
bolts
are
replaced
during the
maintenance,
operation
should b
e
performed
in sequence from “a” to “h”.
j.
If
the old
cylinder
head bolts
are
not
replace
d
during
the maintenance, operation should
be
performed in se
quence “
a, b, e, f, g a
nd h”.
③
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Then, perform
the
installation steps
which
are
just
contrary to
dismantlement.
4) Check after
Dismantlement
The steps for checking oil leakage, lubricant leakage and tail gas leakage are as following:
■
Before starting
the
engine, check
the
engine oil/coolant
level. If
the
level is lower, replenish the
engine oil/coolant till the specified level is reached.
■
Perform
the
following steps
to
check
whether
the
oil
leakage
occurs:
󲀔

Turn the ignition switch to
the “ON”
position (when engine is stopped). W
ith the oil pressure
acting on the oil pipe, check whether there is fuel leakage at the joint.
󲀔

Start the
engine. W
ith the
engine accelerating,
recheck whether there
is fuel
leakage at
the joint.
■
Run
the
engine to
check
whether
the
abnormal
noise
or
vibration appears.
■ With engine warmed
up
completely, verify that there is no
fuel leakage,
tail
gas leakage or any
oil/fluid (including engine oil and coolant) leakage.
■
After engine
cooled
down, recheck
oil/fluid (including engine
oil
and
engine coolant)
level.
Replenish the oil/fluid to the specified level as required.
Fig.1.1.043
Painting Mark
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JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English