JAC J2 User Manual

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
Maintenance Manual for J2 Sedan
Mechanical Part of Engine
86
XIV
.
Diagnosi
s of Common Troubles
Diagnosis List of Common Troubles
Trouble
Possible
Cause
Resolution
The
cylinder
gasket
is
leaky.
Replace
cylinder
gasket.
The
piston
ring
is
damaged
or
worn.
Replace
the
piston
ring.
The
cylinder
or
the
piston
is
worn.
Repair
or
replace
the
piston
or
the
cylinder body.
Low cylinder
pressure
The valve seat is
worn
or
damaged.
Repair
or
replace
the
valve
seat.
The
volume
of
engine
oil
is
insufficient. Check oil level.
The
engine
oil
pressure sensor
failed.
Replace
sensor.
The
engine
oil filter is blocked.
Replace
filter.
Oil
pump
rotor or cover
damaged
Replace.
The
viscosity
of
engine
oil
is
low.
Check.
Change
oil
as
required.
The plunger of engine oil pressure switch is
constantly
open.
Repair.
Low oil pressure
The
bearing
gap
is
high.
Replace.
High engine oil
pressure
The plunger of engine oil pressure switch is
constantly
closed.
Repair.
The
engine
supporting
bolt
loosened
Tighten
The transmission
mounting
support
loosened.
Tighten
The
engine
support
loosened
Tighten
The
heat
shield
for
engine
is
damaged.
Replace.
The
engine
support
heat
shield is
damaged.
Replace.
Engine quiver
The
heat
shield
for
transmission
is
damaged.
Replace
The
engine
oil is thin
(low
oil
pressure).
Change
oil.
Noise of valve
The
valve
or
the
valve
guide
is
damaged
or
worn.
Replace.
The oil is insufficient. Check the level
of
engine
oil.
The
engine
oil
is
thin
(the
oil
pressure
is
low).
Change
oil.
Noise from
connecting rod
bearing shell and the
main bearing shell
The
bearing
gap
is
wide.
Check
and
then
determine
the
cause.
The radiator
or
the
radiating
pipe
is
leaky.
Repair
or
replace.
The
water
tank
cover
is
not
sealed.
Tighten
or
replace
the
cover.
The
thermostat
is
leaky.
Replace
the
thermostat
pad.
The
radiator
is
leaky.
Repair
or
replace.
Poor cooling
performance
The
water
pump
is
leaky.
Replace.
Jam
in
radiator
The
coolant
contains
the
impurities.
Replace
the
coolant.
The
water
tank
cover
is
not
strictly
sealed.
Replace.
The
cooling
system
is
jammed.
Rinse
or
replace.
High temperature of
coolant
The
thermostat
is
at
fault.
Replace.

JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English