1D – 18
I
ENGINE COOLING
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
GENERAL DESCRIPTION
The cooling system maintains the engine temperature at
an efficient level during all engine operating conditions.
When the engine is cold, the cooling system cools the en-
gine slowly, or not at all. The slow cooling of the engine al-
lows the engine to warm up quickly.
The cooling system includes a radiator and recovery sub-
system, cooling fans, a thermostat and housing, a coolant
pump, and a coolant pump drive belt. The timing belt
drives the coolant pump.
All components must function properly in order for the
cooling system to operate. The coolant pump draws the
coolant from the radiator. The coolant then circulates
through water jackets in the engine block, the intake man-
ifold, and the cylinder head. When the coolant reaches the
operating temperature of the thermostat, the thermostat
opens. The coolant then goes back to the radiator where
it cools.
The system directs some coolant through the hoses to the
heater core. This provides for heating and defrosting. The
surge tank is connected to the radiator to recover the cool-
ant displaced by expansion from the high temperatures.
The surge tank maintains the correct coolant level.
The cooling system for this vehicle has no radiator cap or
filler neck. The coolant is added to the cooling system
through the surge tank.
RADIATOR
This vehicle has a lightweight tube–and–fin aluminum ra-
diator. Three models of radiators are available: small,
standard, and heavy duty. The three models vary only by
size (capacity). Plastic tanks are mounted on the right and
the left sides of the radiator core.
On vehicles equipped with automatic transaxles, the
transaxle fluid cooler lines run through the left radiator
tank.
A radiator drain cock is on the radiator. To drain the cooling
system, open the drain cock.
SURGE TANK
The surge tank is a transparent plastic reservoir, similar to
the windshield washer reservoir.
The surge tank is connected to the radiator by a hose and
to the engine cooling system by another hose. As the ve-
hicle is driven, the engine coolant heats and expands. The
portion of the engine coolant displaced by this expansion
flows from the radiator and the engine into the surge tank.
The air trapped in the radiator and the engine is degassed
into the surge tank.
When the engine stops, the engine coolant cools and con-
tracts. The displaced engine coolant is then drawn back
into the radiator and the engine. This keeps the radiator
filled with the coolant to the desired level at all times and
increases the cooling efficiency.
Maintain the coolant level between the MIN and the MAX
marks on the surge tank when the system is cold.
COOLANT PUMP
The belt–driven centrifugal coolant pump consists of an
impeller, a drive shaft, and a belt pulley. The coolant pump
is mounted on the front of the transverse–mounted en-
gine, and is driven by the timing belt.
The impeller is supported by a completely sealed bearing.
The coolant pump is serviced as an assembly and, there-
fore, cannot be disassembled.
THERMOSTAT
A wax pellet–type thermostat controls the flow of the en-
gine coolant through the engine cooling system. The ther-
mostat is mounted in the thermostat housing to the front
of the cylinder head.
The thermostat stops the flow of the engine coolant from
the engine to the radiator in order to provide faster warm–
up, and to regulate the coolant temperature. The thermo-
stat remains closed while the engine coolant is cold, pre-
venting circulation of the engine coolant through the
radiator. At this point, the engine coolant is allowed to cir-
culate only throughout the heater core to warm it quickly
and evenly.
As the engine warms, the thermostat opens. This allows
the engine coolant to flow through the radiator, where the
heat is dissipated through the radiator. This opening and
closing of the thermostat permits enough engine coolant
to enter the radiator to keep the engine within proper en-
gine temperature operating limits.
The wax pellet in the thermostat is hermetically sealed in
a metal case. The wax element of the thermostat expands
when it is heated and contracts when it is cooled.
As the vehicle is driven and the engine warms, the engine
coolant temperature increases. When the engine coolant
reaches a specified temperature, the wax pellet element
in the thermostat expands and exerts pressure against the
metal case, forcing the valve open. This allows the engine
coolant to flow through the engine cooling system and cool
the engine.
As the wax pellet cools, the contraction allows a spring to
close the valve.
The thermostat begins to open at 87
³
C (189
³
F) and is fully
open at 102
³
C (216
³
F). The thermostat closes at 86
³
C
(187
³
F).
ELECTRIC COOLING FAN
CAUTION : Keep hands, tools, and clothing away
from the engine cooling fans to help prevent personal
injury. This fan is electric and can turn on whether or
not the engine is running.
Содержание NUBIRA
Страница 1: ......
Страница 28: ...9D 2IWIPERS WASHER SYSTEMS DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS WIPERS AND WASHER SYSTEM NOTCHBACK...
Страница 29: ...WIPERS WASHER SYSTEMS 9D 3 DAEWOO V 121 BL4 WIPERS AND WASHER SYSTEM HATCHBACK...
Страница 58: ...DOORS 9P 3 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS POWER DOOR LOCKS...
Страница 59: ...9P 4IDOORS DAEWOO V 121 BL4 POWER WINDOWS FRONT AND REAR...
Страница 92: ...9Q 2IROOF DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS POWER SUNROOF SYSTEM...
Страница 229: ...ANTILOCK BRAKE SYSTEM 4F 5 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS ABS CIRCUIT 1 OF 4...
Страница 230: ...4F 6IANTILOCK BRAKE SYSTEM DAEWOO V 121 BL4 ABS CIRCUIT 2 OF 4...
Страница 231: ...ANTILOCK BRAKE SYSTEM 4F 7 DAEWOO V 121 BL4 ABS CIRCUIT 3 OF 4...
Страница 232: ...4F 8IANTILOCK BRAKE SYSTEM DAEWOO V 121 BL4 ABS CIRCUIT 4 OF 4...
Страница 234: ...4F 10IANTILOCK BRAKE SYSTEM DAEWOO V 121 BL4 Pin Circuit Color Signal Name B11 Not Used B12 BATT ORN Battery...
Страница 252: ...5C0 6ICLUTCH DAEWOO V 121 BL4 1 Flywheel 2 Clutch Disc 3 Pressure Plate 4 Release Bearing...
Страница 272: ...SECTION 2 POSITION OF CONNECTORS AND GROUNDS...
Страница 275: ...2 4WPOSITION OF CONNECTORS AND GROUNDS 2 WIRING HARNESS CONNECTOR GROUND LOCATION 1 W H FRONT FRONT BUMPER...
Страница 276: ...POSITION OF CONNECTORS AND GROUNDSW2 5 2 ENGINE CONTROL BATTERY S 2 0 DOHC ENGINE...
Страница 277: ...2 6WPOSITION OF CONNECTORS AND GROUNDS 3 INSTRUMENT PANEL INSIDE...
Страница 278: ...POSITION OF CONNECTORS AND GROUNDSW2 7 4 AIR BAG INSTRUMENT PANEL 5 BODY...
Страница 279: ...2 8WPOSITION OF CONNECTORS AND GROUNDS 6 W H DOOR 1 Front Door 2 Rear Door...
Страница 280: ...POSITION OF CONNECTORS AND GROUNDSW2 9 7 ABS WHEEL SPEED SENSOR 1 With Sun Roof 2 Without Sun Roof...
Страница 281: ...2 10WPOSITION OF CONNECTORS AND GROUNDS 8 ABS MODULE WHEEL SPEED SENSOR...
Страница 282: ...POSITION OF CONNECTORS AND GROUNDSW2 11 9 REAR 10 FUEL TANK TRUNK LID...
Страница 283: ...2 12WPOSITION OF CONNECTORS AND GROUNDS 11 SPLICE PACK S201 BROWN S202 BLUE S203 BROWN S204 GRAY S205 RED S206 BLUE...
Страница 284: ...POSITION OF CONNECTORS AND GROUNDSW2 13 S207 BLUE S208 WHITE S301 BLUE N B S301 BLUE H B S301 BLUE S W S302 BLACK...
Страница 285: ...2 14WPOSITION OF CONNECTORS AND GROUNDS S303 BLACK N B H B S303 BLACK S W...
Страница 286: ...SECTION 3 WIRING DIAGRAM FOR POWER SUPPLIES...
Страница 287: ...3 2WWIRING DIAGRAM FOR POWER SUPPLIES 1 IGNITION SWITCH CIRCUIT...
Страница 288: ...WIRING DIAGRAM FOR POWER SUPPLIESW3 3 2 30 Ter BAT POWER SUPPLY CIRCUIT PASSENGER ROOM FUSE BOX...
Страница 289: ...3 4WWIRING DIAGRAM FOR POWER SUPPLIES 3 15A IGN 2 15C ACC POWER SUPPLY CIRCUIT PASSENGER ROOM FUSE BOX...
Страница 290: ...WIRING DIAGRAM FOR POWER SUPPLIESW3 5 4 ENGINE ROOM FUSE RELAY CIRCUIT...
Страница 291: ...3 6WWIRING DIAGRAM FOR POWER SUPPLIES...
Страница 292: ...WIRING DIAGRAM FOR POWER SUPPLIESW3 7...
Страница 293: ...SECTION 4 USAGE AND CAPACITY OF FUSES...
Страница 297: ...SECTION 5 ELECTRICAL WIRING DIAGRAMS...
Страница 301: ...9A 2IBODY WIRING SYSTEM DAEWOO V 121 BL4 POWER DISTRIBUTION SCHEMATIC...
Страница 302: ...BODY WIRING SYSTEM 9A 3 DAEWOO V 121 BL4...
Страница 303: ...9A 4IBODY WIRING SYSTEM DAEWOO V 121 BL4 FUSE BLOCK LOCATOR ENGINE FUSE BLOCK LOCATOR PASSENGER COMPARTMENT...
Страница 306: ...BODY WIRING SYSTEM 9A 7 DAEWOO V 121 BL4 REAR HARNESS ROUTING...
Страница 307: ...9A 8IBODY WIRING SYSTEM DAEWOO V 121 BL4 FRONT HARNESS ROUTING...
Страница 308: ...BODY WIRING SYSTEM 9A 9 DAEWOO V 121 BL4 FLOOR HARNESS ROUTING...
Страница 309: ...9A 10IBODY WIRING SYSTEM DAEWOO V 121 BL4 INSTRUMENT HARNESS ROUTING...
Страница 310: ...BODY WIRING SYSTEM 9A 11 DAEWOO V 121 BL4 DOOR HARNESS ROUTING...
Страница 313: ...LIGHTING SYSTEMS 9B 3 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS HEADLAMPS ON REMINDER CHIME CIRCUIT...
Страница 314: ...9B 4ILIGHTING SYSTEMS DAEWOO V 121 BL4 PARKING TAIL POSITION AND LICENSE LAMPS CIRCUIT...
Страница 315: ...LIGHTING SYSTEMS 9B 5 DAEWOO V 121 BL4 TURN AND HAZARD LAMPS CIRCUIT...
Страница 316: ...9B 6ILIGHTING SYSTEMS DAEWOO V 121 BL4 BRAKE AND BACKUP LAMPS CIRCUIT...
Страница 317: ...LIGHTING SYSTEMS 9B 7 DAEWOO V 121 BL4 INTERIOR COURTESY LAMP AND LUGGAGE COMPARTMENT LAMP CIRCUIT...
Страница 318: ...9B 8ILIGHTING SYSTEMS DAEWOO V 121 BL4 HEADLAMPS CIRCUIT...
Страница 319: ...LIGHTING SYSTEMS 9B 9 DAEWOO V 121 BL4 DAYTIME RUNNING LAMPS CIRCUIT...
Страница 320: ...9B 10ILIGHTING SYSTEMS DAEWOO V 121 BL4 FOG LAMPS CIRCUIT...
Страница 342: ...9C 2IHORNS DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS HORN WIRING SYSTEM...
Страница 344: ...9C 4IHORNS DAEWOO V 121 BL4 2 Connect the electrical connector 3 Connect the negative battery cable...
Страница 347: ...9F 2IAUDIO SYSTEMS DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS AUDIO SYSTEM CIRCUIT...
Страница 365: ...CRUISE CONRTOL SYSTEM 9U 3 DAEWOO V 121 BL4 CRUISE CONTROL SYSTEM AUTOMATIC TRANSAXLE 2 OF 2...
Страница 366: ...9U 4ICRUISE CONRTOL SYSTEM DAEWOO V 121 BL4 CRUISE CONTROL SYSTEM MANUAL TRANSAXLE 1 OF 2...
Страница 367: ...CRUISE CONRTOL SYSTEM 9U 5 DAEWOO V 121 BL4 CRUISE CONTROL SYSTEM MANUAL TRANSAXLE 2 OF 2...
Страница 407: ...GENERAL INFORMATION 0B 25 DAEWOO V 121 BL4...
Страница 408: ...0B 26IGENERAL INFORMATION DAEWOO V 121 BL4 Vehicle Lifting Points...
Страница 427: ...1C 8IDOHC ENGINE MECHANICAL DAEWOO V 121 BL4 COMPONENT LOCATOR UPPER END...
Страница 429: ...1C 10IDOHC ENGINE MECHANICAL DAEWOO V 121 BL4 LOWER END...
Страница 520: ...ENGINE CONTROLS 1F 15 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS PCM ECM WIRING DIAGRAM 1 OF 6 IPCM 6KD ISFI 6TD...
Страница 521: ...1F 16IENGINE CONTROLS DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 2 OF 6 IPCM 6KD ISFI 6TD...
Страница 522: ...ENGINE CONTROLS 1F 17 DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 3 OF 6 IPCM 6KD ISFI 6TD...
Страница 523: ...1F 18IENGINE CONTROLS DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 4 OF 6 IPCM 6KD ISFI 6TD...
Страница 524: ...ENGINE CONTROLS 1F 19 DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 5 OF 6 IPCM 6KD ISFI 6TD...
Страница 525: ...1F 20IENGINE CONTROLS DAEWOO V 121 BL4 PCM ECM WIRING DIAGRAM 6 OF 6 IPCM 6KD ISFI 6TD...
Страница 526: ...ENGINE CONTROLS 1F 21 DAEWOO V 121 BL4 CONNECTOR END VIEW...
Страница 527: ...1F 22IENGINE CONTROLS DAEWOO V 121 BL4...
Страница 528: ...ENGINE CONTROLS 1F 23 DAEWOO V 121 BL4...
Страница 529: ...1F 24IENGINE CONTROLS DAEWOO V 121 BL4...
Страница 530: ...ENGINE CONTROLS 1F 25 DAEWOO V 121 BL4...
Страница 531: ...1F 26IENGINE CONTROLS DAEWOO V 121 BL4 COMPONENT LOCATOR...
Страница 541: ...1F 36IENGINE CONTROLS DAEWOO V 121 BL4...
Страница 632: ......
Страница 633: ......
Страница 669: ...4T40 E AUTOMATIC TRANSAXLE 5A 15 DAEWOO V 121 BL4 SCHEMATIC AND ROUTING DIAGRAMS POWERTRAIN CONTROL MODULE 1 OF 3...
Страница 670: ...5A 16I4T40 E AUTOMATIC TRANSAXLE DAEWOO V 121 BL4 POWERTRAIN CONTROL MODULE 2 OF 3...
Страница 671: ...4T40 E AUTOMATIC TRANSAXLE 5A 17 DAEWOO V 121 BL4 POWERTRAIN CONTROL MODULE 3 OF 3...
Страница 681: ...FIVE SPEED MANUAL TRANSAXLE 5B 9 DAEWOO V 121 BL4 COMPONENT LOCATORS GEARS AND CASE...
Страница 684: ...5B 12IFIVE SPEED MANUAL TRANSAXLE DAEWOO V 121 BL4 SHIFT LINKAGE...