2003 DAEWOO MATIZ torque

GENERAL ENGINE INFORMATION 1A–5
DAEWOO M-150 BL2
DIAGNOSTIC INFORMATION PROCEDURE
GENERAL DIAGNOSIS
 
 Condition
 
 Probable cause
 
 Correction
Hard Starting (WithMalfunction of
Faulty fuse.
Replace the fuse.
normal cranking)Ignition System
Faulty spark plug.
Clean, adjust the plug gap or
replace.

Electric leakage at the high
tension cable.
Replace the cable.

Poor connection of the high
tension cable or lead wires.
Replace the cable or wires.

Worn distributor cap or
accumulated carbon in the
distributor cap.
Replace or clean the
distributor cap.

Damaged distributor rotor or
cap.
Replace the rotor or the cap.

Improper ignition timing.
Adjust the ignition timing.

Faulty ignition coil.
Replace the ignition coil.
Malfunction of Fuel
Lock of fuel in the fuel tank.
Feed the fuel.
System
Dirty or clogged fuel filter.
Replace the filter.

Clogged fuel pipe.
Clean the fuel pipe.

Malfunction of the fuel pump.
Replace the fuel pump.

Malfunction of the fuel
injector.
Replace the injector.

The foreign material in the
fuel tank.
Clean the fuel tank.
Decline of
Compression
Poor tightening spark plug.
Tighten to the specified
torque.
Pressure
Cracked cylinder head
gasket.
Replace the gasket.

Inadequate the valve
clearance.
Adjust the clearance.

Leakage of the valve
clearance.
Repair the valve.

Interference of the valve
stem.
Replace the valve or the
valve guide.

Low elasticity or damage of
the valve spring.
Replace the valve spring.

Abnormal interference of
pistons and cylinders.
Replace the piston ring.

Excessive wear of pistons,
rings, or cylinders.
Replace the ring or the
piston and boring or replace
the cylinder.

1A–10 GENERAL ENGINE INFORMATION
DAEWOO M-150 BL2
GENERAL DIAGNOSIS (Cont’d)
 Condition Probable cause Correction
Low Oil PressureMalfunction of
Lubrication
Lowered function of the oil
pump.
Replace the pump.
System
Abrasion or damage of the
oil pump relief valve.
Replace the valve.
Engine NoiseValve Noise
Inadequate valve clearance.
Adjust the valve clearance.

Abrasion of valve stem or
guide.
Replace the valve stem or
the guide.

Weak valve spring.
Replace the spring.
Piston, Ring,
Cylinder Noise
Abrasion of the piston, the
ring or the cylinder.
Boring the cylinder or
replace the piston, the ring
or the cylinder.
Connecting Rod
Noise
Abrasion of the connecting
rod bearing.
Replace the bearing.

Loosened the connecting rod
nut.
Tighten to the specified
torque.
Crankshaft
Noise
Abrasion of the crankshaft
bearing.
Replace the bearing.

Abrasion of the crankshaft
journal.
Grind or replace the
crankshaft journal.

Loosened bearing cap bolt.
Tighten to the specified
torque.

Excessive clearance of the
crankshaft thrust bearing.
Adjust or replace.

Low oil pressure.
Refer to “Low Oil Pressure”
in this section.

1A–14 GENERAL ENGINE INFORMATION
DAEWOO M-150 BL2
SPECIFICATIONS
GENERAL SPECIFICATIONS
 Application Description
  Maximum Speed 144 km/h (90 mph)
 Vehicle Capacity Gradeability 0.420 tan θ
 
Vehicle Capacity
 Minimum Turning Radius 4.5 m (14.8 ft)
  Bore × Stroke 68.5 × 72.0 mm (2.70 × 2.83 inch)
  Displacement 796 cm3 (48.6 in3)
  Compression Ratio 9.3 : 1
  Maximum Power 37.5 KW (6,000 rpm)
 
Engine Information
 Maximum Torque 68.6 Nm (50.59 lb-ft) (at 4,600 rpm)
Ignition Timing (Ignition Sequence)5 BTDC (1–3–2) / 10 BTDC (1–3–2)   
Air Conditioning System (ON)
 
1,000 ± 50 rpm  Idle Speed Air Conditioning System (OFF) 950 rpm  Engine Overhead Cam L–3 
 
 
 Ignition Type
 
 Direct Ignition System (DIS) /
High Energy Ignition (HEI)
  Distributor Optical Sensor Type
  Starter SD 80
   Unleaded BPR5EY–11, RN9YC4, WR8DCX
  Spark–Plug Leaded BPR5EY, RN9YC, WR8DC
  Fuel Injection Type MPI
  Fuel Pump Electric Motor Pump
Engine Part TypeFuel FilterCartridge Engine Part Type 
Lubricating Type
 
Forced Feed Type  Oil Pump Rotary Pump Type  Cooling Type Forced Water Circulation  Radiator Cross – Flow  Water Pump Centrifugal  Thermostat Pellet Type
  Air Cleaner Element Non Woven Fablic
  Muffler Catalytic Converter, Closed Circuit
  Battery MF
Engine PartEngine OilSJ Grade
SAE 5W30, SAE 10W30, SAE 15W40
CapacityRefrigerantFour Seasons   
Engine Disassembly
 
3.0 L (3.17 qt)   Oil Change (Including filter) 2.7 L (2.85 qt)  Engine Oil Oil Change (Not including filter) 2.5 L (2.64 qt)   Oil Level Gauge 1 L (1.06 qt) (MIN to MAX)  Coolant 3.8 L (4.02 qt) Engine Information Battery 12V–35 AH, 246 CCA
 Engine Information  

Generator

65 A
  Starter 0.8 kW
   Output Capacity 90 – 133 Lph
  Fuel Pump Output Pressure 380 kPa (55.1 Psi)
  Fuel Tank Capacity 35 L (9.2 gal), 38 L (10 gal)

GENERAL ENGINE INFORMATION 1A–15
DAEWOO M-150 BL2
ENGINE PERFORMANCE CURVE

Maximum Power
: 51 PS (37.5 KW)
(at 6,000 rpm)

Maximum Torque
: 7 Kgm (68.6 Nm)
(at 4,600 rpm)
D12A101A

1B – 2 SOHC ENGINE MECANICAL
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
ENGINE TYPE
The engine is 4-cycle, water-cooled, in-line 3 cylinders
with displacement of 796cc (68.5×72.0mm) (2.70×
2.83 in.).
Engine model
(Specifications)F8C Type SOHC /
2 Valve (MPI)
Maximum power (kw/rpm)37.5 / 6,000
Maximum torque (N
m/rpm)68.6 / 4,600
Compression ratio9.3 : 1
D102B001
ENGINE LUBRICATION
The engine lubrication is of the wetsump method to draw
up the oil forced by the oil pump. The oil pump is of a
trochoid type, and mounted on crankshaft at crankshaft
pulley side (a). Oil is drawn up through oil pump pickup
tube (b) and passed through pump (c) to oil filter (d). The
filtered oil flows into two paths in engine block. In one
path (e), oil reaches crankshaft journal bearings. Oil
from crankshaft journal bearings is supplied to connect-
ing rod bearings by means of intersecting passages
drilled in crankshaft, and then injected from a small hole
provided on big end of connecting rod to lubricate piston
(f), rings, and cylinder wall. In another path (g), oil goes
up to cylinder head and lubricates rocker arm (i), valve
(j), camshaft (k), etc. through the oil hole provided on the
rocker arm shaft (h).
D102B002
CYLINDER HEAD AND VALVE TRAIN
The cylinder head is made of cast aluminum alloy for
better strength in hardness with lightweight, and cam-
shaft (k) and rocker arm shaft (h) arranged in-line sup-
port.
D102B003
The combustion chambers are formed into the manifold
combustion chambers with increased squish parts for
better combustion efficiency and its intake and exhaust

SOHC ENGINE MECANICAL 1B–9
DAEWOO M-150 BL2
DIAGNOSTIC INFORMATION AND PROCEDURE
COMPRESSION PRESSURE CHECK
Tools Required
09915–64510 Compression Pressure Gauge
Check the compression pressure in the following proce-
dures:
1. Warm up the engine to the normal operating tempera-
ture (Cooling temperature : 80–90C (176–194F)).
2. Stop the engine and then remove the high tension
cable and the spark plug.
3. Disconnect the distributor optical sensor connector.
4. Install the compression pressure gauge 09915–64510
(a) in the hole of spark plug.
D12B301A
5. Disengage the clutch in Neutral (to lighten starting
load on engine upon cranking), and depress the ac-
celerator all the way to make the throttle fully open.
6. Crank the engine with the starting motor, and read the
highest pressure on the compression pressure gauge.
The difference of measured value between cylinders
is 98.06kPa (14.22 psi) and less.
On checking, make the connection perfectly airtight
between the hole of spark plug and compression pres-
sure gauge.
Unit Standard Limit



Compression
Pressure
– 400 rpm
kPa(psi)1,225.75
(177.73)
1,176.72–
1,274.78
(170.62–
184.84)
7. After checking, remove the gauge and install the re-
moved parts.
OIL PRESSURE CHECK
Tools Required
09915–77310 Oil Pressure Gauge
Prior to check oil pressure, check the followings:
Check oil level and add if required.
Replace the discolored, deteriorated or diluted oil.
Check any oil leakage and repair the defective parts.
Check the compression pressure in the following proce-
dures:
1. Remove the oil pressure switch (b) from the cylinder
block.
2. Install the oil pressure gauge 09915–77310 (c) to the
mounting place of the oil pressure switch.
D12B302A
3. Start the engine and warm up to the normal operating
temperature.
4. Raise the engine speed up to 2,000rpm and then
read oil pressure.
Item Unit Standard
Oil Pressure – 2000rpmkPa
(psi)245.15–294.18
(35.55–42.66)
5. After checking, wrap the threads of oil pressure
switch with a seal tape and tighten it to the specified
torque 12–16 N
m (106–144 lb-in).
6. Start the engine and check oil pressure switch for oil
leakage.

1D–8 ENGINE COOLING
DAEWOO M-150 BL2
COOLING SYSTEM DIAGNOSIS
Condition Probable Cause Correction
Engine OverheatsA loss of the coolant.Add the coolant.
A weak coolant solution.Confirm that the coolant solution is a
50/50 mixture of ethylene glycol and
water.
Any dirt, any leaves, or any insects
on the front of the radiator.Clean the front of the radiator.
The leakage from the hoses, the
coolant pump, the heater, the
thermostat housing, the radiator, the
heater core, or the head gasket.Replace any damaged components.
A faulty thermostat.Replace a damaged thermostat.
Retarded ignition timing.Perform an ECM code diagnosis.
Confirm the integrity of the timing
belt.
An improperly operating electric
cooling fan.Replace the electric cooling fan.
Plugged or rotted radiator hoses.Replace any damaged radiator
hoses.
A faulty water pump.Replace a faulty water pump.
A faulty surge tank cap.Replace a faulty surge tank cap.
A cracked or plugged cylinder head
or engine block.Repair the damaged cylinder head or
the damaged engine block.
A faulty radiator.Replace a faulty radiator.
Loss of CoolantA leak in the radiator.Replace a damaged radiator.
A leak in the surge tank or the hose.Replace the surge tank or the hose.
Looseness or damage of radiator
hoses, heater hoses, or connections.Reseat the hoses.
Replace the hoses or the clamps.
Leaks in the coolant pump seal.Replace the coolant pump seal.
Leaks in the coolant pump gasket.Replace the coolant pump gasket.
An improper cylinder head torque.Tighten the cylinder head bolts to
specifications.
Replace the cylinder head gasket, if
needed.
Leaks in the intake manifold, cylinder
head gasket, heater core.Repair or replace any components,
as needed to correct the leak.
Engine Fails to Reach
Normal OperatingThermostat to be stuck open or to be
wrong type.Install a new thermostat of the
correct type and heat range.
Temperature or Cool Air
from the HeaterThe coolant level below the MIN
mark on the surge tank.Add sufficient coolant to raise the
fluid to the specified mark on the
surge tank.

1F–16 ENGINE CONTROLS
DAEWOO M-150 BL2
the obstruction of the reference air and degrade the O2S
performance.
Misfire Monitor Diagnostic Operation
The misfire monitor diagnostic is based on crankshaft
rotational velocity (reference period) variations. The En-
gine Control Module (ECM) determines crankshaft rota-
tional velocity using the Crankshaft Position (CKP)
sensor and the Camshaft Position (CMP) sensor. When
a cylinder misfires, the crankshaft slows down momen-
tarily. By monitoring the CKP and CMP sensor signals,
the ECM can calculate when a misfire occurs.
For a non-catalyst damaging misfire, the diagnostic will
be required to monitor a misfire present for between
1000–3200 engine revolutions.
For catalyst-damaging misfire, the diagnostic will re-
spond to misfire within 200 engine revolutions.
Rough roads may cause false misfire detection. A rough
road will cause torque to be applied to the drive wheels
and drive train. This torque can intermittently decrease
the crankshaft rotational velocity. This may be falsely
detected as a misfire.
A rough road sensor, or “G sensor,” works together with
the misfire detection system. The rough road sensor
produces a voltage that varies along with the intensity of
road vibrations. When the ECM detects a rough road,
the misfire detection system is temporarily disabled.
Misfire Counters
Whenever a cylinder misfires, the misfire diagnostic
counts the misfire and notes the crankshaft position at
the time the misfire occurred. These “misfire counters”
are basically a file on each engine cylinder. A current
and a history misfire counter are maintained for each
cylinder. The misfire current counters (Misfire Current
#1–4) indicate the number of firing events out of the last
200 cylinder firing events which were misfires. The mis-
fire current counter will display real time data without a
misfire DTC stored. The misfire history counters (Misfire
Histtory #1–4) indicate the total number of cylinder firing
events which were misfires. The misfire history counters
will display 0 until the misfire diagnostic has failed and a
DTC P0300 is set. Once the misfire DTC P0300 is set,
the misfire history counters will be updated every 200
cylinder firing events. A misfire counter is maintained for
each cylinder.
If the misfire diagnostic reports a failure, the diagnostic
executive reviews all of the misfire counters before re-
porting a DTC. This way, the diagnostic executive re-
ports the most current information.
When crankshaft rotation is erratic, a misfire condition
will be detected. Because of this erratic condition, the
data that is collected by the diagnostic can sometimes
incorrectly identify which cylinder is misfiring.
Use diagnostic equipment to monitor misfire counter
data on EOBD compliant vehicles. Knowing which spe-
cific cylinder(s) misfired can lead to the root cause, evenwhen dealing with a multiple cylinder misfire. Using the
information in the misfire counters, identify which cylin-
ders are misfiring. If the counters indicate cylinders
numbers 1 and 4 misfired, look for a circuit or compo-
nent common to both cylinders number 1 and 4.
The misfire diagnostic may indicate a fault due to a tem-
porary fault not necessarily caused by a vehicle emis-
sion system malfunction. Examples include the following
items:

Contaminated fuel.

Low fuel.

Fuel-fouled spark plugs.

Basic engine fault.
Fuel Trim System Monitor Diagnostic
Operation
This system monitors the averages of short-term and
long-term fuel trim values. If these fuel trim values stay
at their limits for a calibrated period of time, a malfunc-
tion is indicated. The fuel trim diagnostic compares the
averages of short-term fuel trim values and long-term
fuel trim values to rich and lean thresholds. If either val-
ue is within the thresholds, a pass is recorded. If both
values are outside their thresholds, a rich or lean DTC
will be recorded.
The fuel trim system diagnostic also conducts an intru-
sive test. This test determines if a rich condition is being
caused by excessive fuel vapor from the controlled char-
coal canister. In order to meet EOBD requirements, the
control module uses weighted fuel trim cells to deter-
mine the need to set a fuel trim DTC. A fuel trim DTC
can only be set if fuel trim counts in the weighted fuel
trim cells exceed specifications. This means that the ve-
hicle could have a fuel trim problem which is causing a
problem under certain conditions (i.e., engine idle high
due to a small vacuum leak or rough idle due to a large
vacuum leak) while it operates fine at other times. No
fuel trim DTC would set (although an engine idle speed
DTC or HO2S DTC may set). Use a scan tool to observe
fuel trim counts while the problem is occurring.
A fuel trim DTC may be triggered by a number of vehicle
faults. Make use of all information available (other DTCs
stored, rich or lean condition, etc.) when diagnosing a
fuel trim fault.
Fuel Trim Cell Diagnostic Weights
No fuel trim DTC will set regardless of the fuel trim
counts in cell 0 unless the fuel trim counts in the
weighted cells are also outside specifications. This
means that the vehicle could have a fuel trim problem
which is causing a problem under certain conditions (i.e.
engine idle high due to a small vacuum leak or rough
due to a large vacuum leak) while it operates fine at oth-
er times. No fuel trim DTC would set (although an en-
gine idle speed DTC or HO2S DTC may set). Use a
scan tool to observe fuel trim counts while the problem is
occurring.