cooling GREAT WALL HOVER 2006 Service Repair Manual

Overview of the entire car-1
Chapter 1
Overview of the entire car
Basic parameter....................................................... 2
Engine..................................................................... 4
Air inlet system........................................................ 5
Exhaust air system................................................... 5
Fuel supply system................................................... 5
Cooling system........................................................ 5
Clutch..................................................................... 5
Transmission............................................................ 6
Drive shaft............................................................... 6
Front shaft/axle........................................................ 6
Rear axle................................................................. 6
Wheel tyre............................................................... 6
Suspension.............................................................. 7
Frame..................................................................... 7
Steering system........................................................ 7
Brake system........................................................... 8
Car body................................................................. 9
Electrical system.................................................... 10
Air-conditioning system …………………..............12

Engine
For the structure and main technical parameter of engine see Table 2.
Table 2 Structure and main technical parameter of engine

Serial No. Item Specification and parameter
1 model 4G64S4M
2 style 4-cylinder, straight-line, water-cooling, single top
cam shaft, 4-stroke engine
3 Fuel oil supply method Multi-point fuel oil injection(MPI)
4 Measuring method of inlet capacity Speed compact style
5 Combustion room style Single-slope roof
6 Cylinder diameter × stroke(mm) 86.5×100
7 Total displacement (L) 2.351
8 Compression ratio 9.5:1
9 Max. power and corresponding speed (kW/r/min) 93/5250
10 Max. torque and corresponding speed (N·m/rpm) 190/2500
11 Min. fuel consumption (g/kW·h) ≤254
12 Idle stable speed(r/min) 750±30
13 Idle-speed control Electronic closed loop control
14 Mean piston speed(m/s) 17.5
15 Mean effective pressure (kPa) 1036
1 6 C y l i n d e r c o m p r e s s i o n p r e s s u r e : i n 250r/min (kPa) 1 3 2 0
17 Ignition sequence and control 1-3-4-2; without distributor block, electronic
controlled direct ignition
18 Spark plug gap(mm) 1.0～1.1
19 Spark plug model BKR5E-11 or K16PR-U11 or RC10YC4
BKR6E-11 or K20PR-U11 or RC8
20 Manufacturer of spark plug NGK or DENSO or Xiang huo ju
21 Valve clearance(mm) 0(hydraulic column )
22 Port timing: Opened inlet/closed inlet
Opened outlet/closed outlet 18 °before upper stop point/ 53 °after lower stop
point
50°before lower stop point/ 18 °after upper stop
point
23 Lubrication method Combined method of pressure and splash
24 Pressure of engine oil of main oil channel, in idle
speed of 3000rpm (kPa) (≥78.5)/(245-490)
25 Max. engine oil temperature(℃) 130
26 Consumption ratio of engine oil(g/kW·h) 2

Overview of the entire car-5
The friction, disc, single-diaphragm spring clutch, hydraulic control mechanism. The external diameter of friction disc D=225mm,
internal diameter d=150mm, material is F810.
Adjustment of clutch pedal:
1. Measure the height of clutch pedal (from pedal pad surface to floor) and free stroke of clutch pedal (fork bar pin clearance).
Standard height of clutch pedal: flush with the brake pedal, free stroke of clutch pedal is 5-15mm;
2. Readjust the free stroke of pedal after adjust the height of pedal; rotate the push bar to the standard value, then fix the bolt
and nut;
3. If the free stroke of clutch pedal is not within standard value, it should rotate the adjusting bolt to standard value, then fix
the bolt and nut. Do not move the push bar to main cylinder when adjust the free stroke of pedal;
4. If the free stroke of clutch pedal and clearance between the clutch pedal and floor when the clutch is disengaged de not
consist with the standard, this may by caused by the air in hydraulic system and failure of main cylinder or clutch. It can
discharge the air of system or dissemble and inspect the main cylinder or clutch.
Table 2 Structure and main technical parameter of engine(continued)

Serial No. Item Specification and parameter
27 Consumption ratio of engine oil and fuel oil
(%) ≤0.8
28 Cooling method Closed forced water cooling
29 Starting method Electric motor
30 Net weight(kg) 167
31 Outline dimension: L×W×H (mm) 730×653×667
32 Idle-speed emission CO(%)/HC(ppm) ≤0.5/≤100
33 Emission control degree of operating
condition regulation With three unique catalytic converter, air-fuel
ratio closed loop control, the equipped light
car meets the standard of GB 18352.2－
2001

Air inlet system
Dry-type air cleaner.
Exhaust air system
Primary muffler, with two-stage three-way catalyst device.
Fuel supply system
Adjustment of accelerator pedal
The stroke of accelerator pedal is 155mm; adjust the adjusting nut on wire bracket if it does not consist with the standard.
The fuel tank is plastic tank with capacity of 67L; the oil supply control is the mechanical pedal oil control and
internal-type electric fuel pump; the type of fuel evaporation is the activated carbon can and electric valve control.
Cooling system
Forced circulation water cooling, electric fan and aluminum tube radiator.
Clutch

Air-conditioning system
The structure and parameter of the air-conditioning s ystem is shown in table 8.
Table 8 The structure and parameter of the air-conditioning system

Serial No. Item Structure and Paramet er
1 Structure and
shape

Front and rear heating and cooling air conditioner, vapor compression type
cooling, hot-wat er heating

2 Performance and
parameters

Refrigerating capacity 3.5kW, heat exchange capacity 3.5kW, fan capacity
350m
3/h
3 Operation
Control board button type operation, temperature auto control, air door micro
motor drive, the temperature in the car can be controlled automatically, the
fanning position mode, heating/ cooling mode, air int ern/external cycling mode
and wind speed and t emperature can b e selected and adjusted

4 Refrigerant R134a
5 Compressor SD7V16 variable capacity compressor, with a maximum capacity of 160ml
6 Condenser Parallel stream mode structure, flat pipe thickness of 26mm
7 Evaporator Two box es structure, cascading evaporator, F expansion valve, centrifugal
blower

8 Drying fluid
collector
External diameter φ60.5mm
9
Refrigerating
pipe and
wa r m wa t er pi p e

Refrigerating pipe: complex structure of rubber refrigeration soft tube and
aluminum tube. The warm water pipe: rubber molding pipe

10 Transducer Outdoor temp erature sensor, indoor t emperature sensor, evaporator temperature
sensor
11 pressure switch Three-state pressure switch

Automatic transmission-48
s oleno id
valve Condition Transmission operation
1 Opened
always 1st-Gear replaces 2nd-Gear; 4th-Gear replaces 3rd-Gear. It causes the car form the G ear shift of 1
→1→4→4 when accelerate form static. The transmission stay longer time in Gear; worse 1→4
shift feeling.
Closed always 2nd-Gear replaces 1st-Gear; 3rd-Gear replaces 4th-Gear. It causes the car form the G ear shift of 2
→2→3→3 when accelerate form static. It is said that starts form 2nd-Gear.
2 Closed always 4th-Gear replaces 1st-Gear; 3rd-Gear replaces 2nd-Gear. It causes the car form the G ear shift of 2
→2→3→3 when accelerate form static. That is saying that start form 4th-Gear.
Opened
always 2nd-Gear replaces 3rd-Gear; 1st-Gear replace 4th-Gear.
It cause the car is shifted form 1st-Gear to 2nd-Gear, then from 2nd-G ear to Gear when accelerate
form static. It will feel the transmission is in free gear position after 2→1 Gear shift.
1&2 Opened
always Can not realize the reverse gear; only has 1st-Gear operation.
3 Closed always Following shifts are bad. (2→3 is worst ):1→3, 1→4, 2→3, 2→4, 4→2, 4→1
Opened
always Following gear shifts are worse: 3→4, 4→3, 3→2。
It may cause the gear slide when the hydraulic torque converter is locked.
4 Closed always Following gear shifts are worse:
1→2, 1→3, 1→4, 2→3, 2→4, 3→1, 3→2, (including manual) 3→4, 4→1, 4→3
Opened
always Following gear shifts are worse: (1→2 is worst) 2→4, 3→2 It may cause the gear slide when
the hydraulic torque converter is locked.
6 Closed always The line pressure is high always.
Opened
always The line pressure is low always. So it cause the slide between gears. The clutch C1 and brake belt
B1 will be burned.
7 Closed always The hydraulic torque converter is without lock.
Opened
always The hydraulic torque converter is locked in 3rd-Gear and 4th-Gear. It cause the car generates the
vibration in low-speed status.
Table 6.1.2 Operation of transmission when ON/OFF solenoid valve is faulty
Mechanical detection
1.Inspection of transmission on car
It should process the following detections before disassemble the transmission:
process the on-road drive test to determine the failure cause .(according to requirement)
Detect the standard of transmission fluid. (refer to 7.2.1)
Ensure the transmission fluid in not overheated. (Normal color and smell)
Detect the failure information.
Check the battery terminal and grounding for corrosion or loose.
The engine speed is within the specified value in manual.
Check the cooling system for normal operation.
All power supply and plug wires is tight and not loose.
Check the transmission fluid, ensure the oil pan is without other martial material or pollutant.
2. Oil leakage detection
It should wash the polluted part of the transmission before select the oil leakage part, then drive the car.
When detect the leakage part of the rear servo system, it should lift the car by lifter firstly, then switch the gear to reverse
gear within 10s.
When detect the leakage part of front servo system, it should lift the car by lifter firstly, then switch the gear to gear-2
(winter mode).
The time switched to 2nd-Gear should be no more than 10s to avoid the oil in the torque converter is overheated.
3. FAQ table

Adjustment
Hydraulic system
Following parts is the detailed description for self-detection procedure pointed to the condition occurred in chapter
6. including the condition indicated the failure, to point the problem existed in the hydraulic system.
It should select the proper procedure from the following primary detection when adjust the transmission.
Detection process of transmission fluid
Detect the manual linkage adjusting system(refer to factory manual of car)
Detect the engine idle speed
Anchoring test (beyond the scope of the maintenance manual)
On-road test (beyond the scope of the maintenance manual)
Detection procedure of transmission fluid level
1. General

The process is used to detect the level of vehicle transmission fluid. It will cause the failure or delay of transmission shifting if
the level is low than required value and the vehicle does not reach the drive temperature.
Firstly, process the transmission diagnosis information detection for vehicle (refer to chapter 6). If found the failure of sensor,
then it maybe caused by transmission fluid level is less than specified value.
It should detect whether has the abnormal delay and Gear-position condition when select the forward or reverse-gear by driving
the vehicle. One feature of oil level less than normal value is that the vehicle has the gear-position delay and lack condition when
the vehicle is in steering. The previous problem will occur when the transmission fluid temperature is low.
When the oil temperature is medium and vehicle speed failure is recorded, the gear-position lose condition
will not occurs any longer, it means that needs to fill the transmission with the transmission fluid.
2. Detection of transmission fluid level

When fill up or replace the transmission fluid, it must use the Castrol TQ95 automatic transmission fluid (ATF) or other
permissive oil. It will damage the performance and service life of transmission if use the unpermissive transmission fluid.
Please ensure the transmission fluid level is correct. The transmission also can be damaged if the transmission fluid level is
incorrect.
The setting procedure of transmission fluid level is shown as follows:
Caution:
When the transmission is in operating temperature, the hot transmission fluid may flow out form the
housing if remove the filling plug.
a. If the vehicle is in operating temperature, allow two hours time for cooling before add the transmission fluid, but
it must not more than 4 hours (this will make the transmission locate in the correct temperature range). When the
temperature is overheating, the transmission fluid level will higher than the plug port. Removal of plug will cause
the transmission fluid flows out from the oil filling port, then cause the low level of transmission fluid.
b. The gear-position of transmission is in parking-Gear (P-Gear), shut off the engine.
c. Lifting the vehicle (or parking above the trench).
d. Clean the around of plug when remove it. Then remove and clean the plug and check the O-ring for damage. Install
the oil filling pump in the oil filling hole.
e. Lower the vehicle; the oil filling pump will be connected to the vehicle at this time. Fill the transmission with the
oil partially. Then start the vehicle in P-Gear to rotate the engine in idle speed. Step down the foot brake, pull the
shifting lever in each gear-position in circulation and add the transmission fluid until the action of each gear-
position can be sensed.
f. Shut down the engine; lift the vehicle; ensure the vehicle is always in horizontal.
g. Remove the filling plug 3 minutes after the engine is shut off, but must not be no more than1 hour. At this time, the
correct level position should be in the bottom of oil filling hole. If does not reach the liquid level position, then fill
with few transmission fluid to make it reach the correct level.
h. Replace the transmission; clean the residual transmission fluid on the transmission and
vehicle.
i. Tighten the transmission plug to the specified torque of 30
35Nm.

CD Player and Air Conditioning System-10
Refrigeration of air conditioner failed
T rou ble Des crip tion s Ana l ysis o f the Cause
1.No pick -up o f com pressor 1.
fuse burned down , com presso r’s r elay dama ge
d
2. pressu re sw itch contac t d isco nn ected, short c ircu itor open circ uit o f the
ro utin
g
3. open circ ui t o f clutch’ s w indi ng
4. sw itch burned down
5. ma ster relay b urne d d ow
n
6.
s lid e o f the clut ch
7. beltof the c om presso r b roke ortoo l oose
8. comp ressor failur
e
9. sens or failur e(ju dg ed by read ing t he failu recode
)
10. insu ffic ient cold me dia, lowe r system p ress ur e(< 0 .97M Pa
)
11. system pressu re abov e 1 .37M Pa
12. water t em peratu re of the e ngine t oo high
13. V oltag e o f the clut ch below 7
V
2. Pick -up o f Com pressor 1.
norm
ally -ope n c ontact of the c om presso r’s r elay stuc k a nd seriou s leaka ge
of system cold me dia, system runn ing s hortof cold me di
a
2. no wind from the b lowe
r
R e frig eratio n of
ai r c ondition in
g
syst emfaile
d
3.no wind from the b lowe
r 1.
fuse burned down
2. mo tor b rush ofthe b lowe r dam aged
3. sw itch ofthe b lowe r dam aged
4. comi ng off o f d istrib utio n w ire c onnector s o r circu itdisc
onne cted
5. speed-ad justin g m odule d amaged
6. no wind from the b lowe r w hen a t high s peed, h igh- sp ee d r elay dama ge
d
Press down “Temp+” switch
Step 11: display “11”(set the temperature zone)
Action of the executor mechanism
:
M ode damper: defrost
Circulation damper: external circulation
Te mperature damper: cold end
Wind amount: the minimum
Compressor: off
Attention: during the inspection period fr om step 7 to step 11, the controlle r
will for cibly transit the output signal based on
the code number displayed on the integrated display screen to the functioned executor; the inspection must be done with
such
m ethods as visual inspection, listening to abnormal sound or touching the air vent by hand so as to judge whether
there is any improper operation.
T rouble Diagnosis and T roubleshooting of A i r Conditioning System
Air cooling system

CD Player and Air Conditioning System-12
e .Precautions for the overhaul of air cooling system
When the air cooling system encounters the trouble, the cause for such trouble shall be analyzed inlightof trouble varieties,
followed with the examination and report work.
c. T he c ooling system some time s w orks wh ile some time s refus es towo rk.
T rou ble Des cri p tion s Ana l ysis o f the C ause
1.comp ress or wo rks n orma l l y 1.
ice b lock i nthe c ool i ng s yste
m
2. failu reof therma l resisto r o r tem perature sens ing b ul
b
3. poor contac t o f A /Cswitch
4. cond ensing blow erdama ge
d
T he c ooling system
so me time s p rodu ce
s
re f ri g eratio n e f f ect whil
e
so me time s not
.
comp resso r w orks i mprop erl y 1.s
lid e o f the clut ch
2. comi ng off o f the clut ch ’ s wind i n
g
3. poor earthi ng ofclut ch ’ s wind i n
g
d. N oise o f the air c oolin g s ystem
T r ou ble Des cription s Ana l ysis o f the C ause
No ise o f the air c ooling system too
lo ud N o
ise t oo l oud (1
) b elt t oo
loos e or w orn t oo mu ch
(2 ) f asteni ng screw o f mounting h olde r o f the comp resso
r
lo os en ed
(3 ) m ounti n g h olde r o f the comp resso r dam aged
(4 ) i nter na l p arts of the c om pr
esso r dam aged
(5 ) t oo mu chref ri g eratio n o ilor none
(6 ) .
slid e o f the clut ch
(7 ) . B e aring o f the clut ch runni ngshort o f o i lor dama ge
d
(8 ) . mo tor b earing ofthe b lowe r dam aged
(9 ) h olde r o f the blow erbrok en or
loos ened
(1 0) blad e o f the blow erbrok en or
loos ened
(1 1) . F rict io n o f the blow er’ s blad e w ith o ther comp onents

Safety airbag-29
auto body outer panel.
release wiring harness
auto body outer panel.
releases wring harness. Mutually connect (short) the other end of release wring harness to avoid the possible incorrect release caused by the static
interference.
d. At the clock spring’s 2# joint, tract the translation wiring harness out of the vehicle with the release wiring harness (Figure 9.2)
e. Close all the windows and doors and wear the guard to reduce the noises.
Caution
The guard should be worn because the glass with cracks is very fragile.
f. Shut off the joint of driver’s side safety airbag release wiring harness somewhere far from the vehicle, and connects the joint
with the accumulator and makes the safety airbag release.
clock spring connector clipclock spring
srs translation wiring harness
release wiring harness
Caution
Continue the operation after the confirmation of nobody is in or next to the vehicle.
Its gas generator is quite hot after the driver’s side safety airbag’s release, it can be used after its cooling down for more
than 30 minutes.
Contact with the local service station of the Great Wall Auto Stock Corporation if the driver’s side safety airbag module
cannot be released.
g. Abandon the released driver’s side safety airbag module according to the instructions.

Safety airbag-31
release wiring harness.
driver’s side safety airbag module
release wiring harness
Installed the stand-by bolts on the driver’s side safety airbag module’s inside bolt and fasten a thick wire to the wheel rim to
fix it.
Connect the release wiring harness connecting with the driver’s side safety airbag module with the low part of an old tire loading
the wheel rim. ( refer to figure 9-6)
Lay three wheel-hub-free old tires on the tire fixing the driver’s side safety airbag module (Figure 9-7).
wheel-hub-free old tires
release wiring harness
Shut off the joint of driver’s side safety airbag release wiring harness somewhere far from the vehicle, and connect the joint with
the accumulator and make the safety airbag release (Figure9-8).
Caution
Release the driver’s side safety airbag module after the confirmation of nobody close to it.
Its gas generator is quite hot after the driver’s side safety airbag’s release, it can be used after its cooling down for more
than 30 minutes.
Contact with the local service station of the Great Wall Auto Stock Corporation if the driver’s side safety