2004 DAEWOO LACETTI Engine Type 1.6L DOHC

0B – 2IGENERAL INFORMATION
DAEWOO V–121 BL4
Engine
Application1.4L DOHC1.6L DOHC1.8L DOHC
Engine TypeDual Overhead Cam L–4


Bore77.9 mm (3.06 in.)79 mm (3.11 in.)81.6 mm (3.21 in.)
Stroke73.4 mm (2.89 in.)81.5 mm (3.21 in.)86 mm (3.38 in.)
Total Displacement1399 cm3 (85.4 in.3)1598 cm3 (97.5 in.3)1799 cm3 (109.7 in3)
Compression Ratio9.5 : 1
9.8 : 1
Maximum Power69.5 kw (93.2 hp)
(at 6,300 rpm)80 kw (107.3 hp)
(at 5,800 rpm)90 kw (120.7 hp)
(at 5,800 rpm)
Maximum Torque131 N_m (96.6 lb–ft)
(at 4,400 rpm)150 NSm (110.6 lb–ft)
(at 4,000 rpm)165 NSm (121.7 lb–ft)
(at 4,000 rpm)
Ignition System
Application1.4L DOHC1.6L DOHC1.8L DOHC
Ignition TypeDirect Ignition System


Ignition Timing (BTDC)4°5°

Ignition Sequence1–3–4–2


Spark Plug Gap1.0 ~ 1.1 mm
(0.039 ~ 0.043 in.)
0.9 ~ 1.1 mm
(0.035 ~ 0.043 in.)
Spark Plug MakerWoojin
Boach
Spark Plug TypeBKR6E–11
FLR8LDCU
Clutch
Application1.4L DOHC1.6L DOHC1.8L DOHC
TypeSingle Dry Plate


Outside Diameter215 mm (8.5 in.)


Inside Diameter145 mm (5.7 in.)


Thickness8.4 mm (0.331 in.)


FluidCommon Use:
Brake Fluid


Manual Transaxle
Application1.4L DOHC1.6L DOHC1.8L DOHC
MakerGMDATGMDAT

Type or ModelD–16 (C/R)D–16 (C/R)

Gear Ratio :
1st
2nd
3rd
4th
5th
Reverse3.818 : 1
2.158 : 1
1.478 : 1
1.129 : 1
0.886 : 1
3.333 : 13.545 : 1
2.158 : 1
1.478 : 1
1.129 : 1
0.886 : 1
3.333 : 1











Final Drive Ratio3.722 : 13.722 : 1

Oil Capacity1.8L (2 qts)

0B – 14IGENERAL INFORMATION
DAEWOO V–121 BL4
Engine Cooling System
Inspect the coolant and freeze protection fluid. If the fluid
is dirty or rusty, drain, flush and refill the engine cooling
system with new coolant. Keep the coolant at the proper
mixture in order to ensure proper freeze protection, corro-sion protection and engine operating temperature. Inspect
the hoses. Replace the cracked, swollen, or deteriorated
hoses. Tighten the clamps. Clean the outside of the radia-
tor and the air conditioning condenser. Wash the filler cap
and the neck. Pressure test the cooling system and the
cap in order to help ensure proper operation.
RECOMMENDED FLUIDS AND LUBRICANTS
UsageCapacityFluid/Lubricant
Engine Oil3.75L (4.0 qt) : 1.4L DOHC
3.75L (4.0 qt) : 1.6L DOHC
4.0L (4.2 qt) : 1.8L DOHCAPI SL (ILSAC GF–III) grade or better
SAE 5W–30, SAE10W–30, SAE15W–40
(Cold area : SAE5W–30
Hot area : SAE 15W–40)
Engine Coolant7.0L (7.49 qt) : 1.4L DOHC
7.2L (7.6 qt) : 1.6L DOHC
7.4L (7.8 qt) : 1.8L DOHCMixture of water and good quality ethylene gly-
col base antifreeze (year–round coolant)
Brake Fluid and Clutch Fluid0.5L (0.5 qt)DOT–3 or DOT–4
Power Steering System1.1L (1.2 qt)DEXRON®–III or DEXRON®–IID
Automatic Transaxle5.77 ± 0.2L (6.1 ± 0.2 qts) :
1.6L DOHC (AISIN 81–40LE)ESSO JWS 3309 or ISU DEXRON III
6.9 ± 0.2L (7.3 ± 0.2 qts) :
1.8L DOHC (ZF 4HP16)ESSO LT 71141 or TOTAL ATF H50235
Manual Transaxle1.8L (2.0 qt)Manual Transaxle Fluid
SAE80W (Cold Area : SAE 75W)
Manual Transaxle Shift LinkageAs requiredMultipurpose type grease meeting require-
ments NLGI No. 1 or 2
Key Lock CylindersAs requiredSilicone lubricant
Automatic Transaxle Shift Link-
ageAs requiredEngine oil
Clutch Linkage Pivot PointsAs requiredEngine oil
Floor Shift Linkage PointsAs requiredEngine oil
Hood Latch Assembly
a. Pivots and Spring Anchor
b. Release PawlAs requireda. Engine oil
b. Multipurpose type grease meeting require-
ments NLGI No. 1 or 2
Hood and door hinges
Fuel door hinge
Rear compartment lid hingesAs requiredEngine oil
WeatherstripsAs requiredSilicone grease

GENERAL INFORMATION 0B – 17
DAEWOO V–121 BL4
VIN Plate Location
The vehicle identification number (VIN) plate is attached
to the top of the front panel support.
VIN Plate
1. Manufacturer ’s Name
2. Whole Vehicle Type Approval No.
3. VIN (Vehicle Identification No.)
4. GVW
5. Combination Weight (GVW + Braked Trailer
Weight)
6. Maximum Permissible Axle Weight – Front
7. Maximum Permissible Axle Weight – Rear
Engraved VIN Location
The vehicle identification number (VIN) is engraved in the
top of the bulkhead.
Engine Number Location
The engine number is stamped on the cylinder block under
the No. 4 exhaust manifold of the engine.
1.4L/1.6L DOHC Engine
1.8L DOHC Engine

1C1 – 2I1.4L/1.6L DOHC ENGINE MECHANICAL
DAEWOO V–121 BL4
SPECIFICATIONS
ENGINE SPECIFICATIONS
ApplicationDescription (Manual and Automatic)
1.4L DOHC1.6L DOHC
General Data:
Engine TypeF14DF16D
Displacement1399 cm31598 cm3 (97.51 in3)
Bore Stroke77.9 x 73.4 mm (3.01 in. x 2.89 in.)79.0 x 81.5 mm (3.1 in. X 3.21 in.)
Compression Ratio9.5 ± 0.2:19.5 ± 0.2:1
Firing Oder1–3–4–21–3–4–2
Cylinder Bore:
Diameter77.9 mm (3.07 in.)79 mm (3.1 in.)
Out of Round (Maximum)0.0065 mm (0.00025 in.)0.0065 mm (0.00025 in.)
Taper (Maximum)0.07 x 30°0.0065 mm (0.00025 in.)
Pistion:
Diameter77.87 mm (3.07 in.)78.970 mm (3.1090 in.)
Clearance to Bore0.030 mm (0.0012 in.)0.030 mm (0.0012 in.)
Piston Rings:
Ring, End Gap:
Top Compression
2nd Compression0.15–0.30 mm
(0.0059–0.0118 in.)
0.3–0.5 mm (0.0118–0.0197 in.)0.2–0.3 mm (0.008–0.012 in.)
0.5–0.6 mm (0.02–0.024 in.)
Groove Clearance:
Top Compression
2nd Compression0.05–0.09 mm
(0.00197–0.00354 in.)
0.06–0.1 mm
(0.00236–0.00393 in.)0.016 mm (0.0006 in.)
0.066 mm (0.0026 in.)
Piston Pin:
Diameter18.00 mm (0.708 in.)18.00 mm (0.708 in.)
Pin Off–Set0.5 ± 0.1 mm
(0.0197 ± 0.00787 in.)0.7–0.9 mm (0.028–0.036 in.)
Camshaft:
Lift Intake7.2 mm (0.283 in.)8.5 mm (0.335 in.)
Lift Exhaust7.2 mm (0.283 in.)8.5 mm (0.335 in.)
End Play0.1–0.25 mm (0.00394–0.00787 in.)0.10–0.25 mm (0.004–0.0089 in.)
Journal OD:
No. 1
No. 2
No. 3
No. 4
No. 529.94 mm (1.179 in.)
26.94 mm (1.061 in.)
26.94 mm (1.061 in.)
26.94 mm (1.061 in.)
26.94 mm (1.061 in.)30 mm (1.18 in.)
27 mm (1.06 in.)
27 mm (1.06 in.)
27 mm (1.06 in.)
27 mm (1.06 in.)

1.4L/1.6L DOHC ENGINE MECHANICAL 1C1 – 77
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
CYLINDER HEAD AND GASKET
The cylinder head is made of an aluminum alloy. The cylin-
der head uses cross–flow intake and exhaust ports. A
spark plug is located in the center of each combustion
chamber. The cylinder head houses the dual camshafts.
CRANKSHAFT
The crankshaft has eight integral weights which are cast
with it for balancing. Oil holes run through the center of the
crankshaft to supply oil to the connecting rods, the bear-
ings, the pistons, and the other components. The end
thrust load is taken by the thrust washers installed at the
center journal.
TIMING BELT
The timing belt coordinates the crankshaft and the dual
overhead camshafts and keeps them synchronized. The
timing belt also turns the water pump. The timing belt and
the pulleys are toothed so that there is no slippage be-
tween them. There are two idler pulleys. An automatic ten-
sioner pulley maintains the timing belt’s correct tension.
The timing belt is made of a tough reinforced rubber similar
to that used on the serpentine accessory drive belt. The
timing belt requires no lubrication.
OIL PUMP
The oil pump draws engine oil from the oil pan and feeds
it under pressure to the various parts of the engine. An oil
strainer is mounted before the inlet of the oil pump to re-
move impurities which could clog or damage the oil pump
or other engine components. When the drive gear rotates,
the driven gear rotates. This causes the space between
the gears to constantly open and narrow, pulling oil in from
the oil pan when the space opens and pumping the oil out
to the engine as it narrows.
At high engine speeds, the oil pump supplies a much high-
er amount of oil than is required for lubrication of the en-
gine. The oil pressure regulator prevents too much oil from
entering the engine lubrication passages. During normal
oil supply, a coil spring and valve keep the bypass closed,
directing all of the oil pumped to the engine. When the
amount of oil being pumped increases, the pressure be-
comes high enough to overcome the force of the spring.This opens the valve of the oil pressure regulator, allowing
the excess oil to flow through the valve and drain back to
the oil pan.
OIL PAN
The engine oil pan is mounted to the bottom of the cylinder
block. The engine oil pan houses the crankcase and is
made of cast metal.
Engine oil is pumped from the oil pan by the oil pump. After
it passes through the oil filter, it is fed through two paths
to lubricate the cylinder block and the cylinder head. In one
path, the oil is pumped through the oil passages in the
crankshaft to the connecting rods, then to the pistons and
the cylinders. It then drains back to the oil pan. In the sec-
ond path, the oil is pumped through the oil passages to the
camshaft. The oil passes through the internal passage-
ways in the camshafts to lubricate the valve assemblies
before draining back to the oil pan.
EXHAUST MANIFOLD
A single four–port, rear–takedown manifold is used with
this engine. The manifold is designed to direct escaping
exhaust gases out of the combustion chambers with a
minimum of back pressure. The oxygen sensor is
mounted to the exhaust manifold.
INTAKE MANIFOLD
The intake manifold has four independent long ports and
uses inertial supercharging to improve engine torque at
low and moderate speeds. The plenum is attached to the
intake manifold.
CAMSHAFTS
This engine is a dual overhead camshaft (DOHC) type,
which means there are two camshafts. One camshaft op-
erates the intake valves, and the other camshaft operates
the exhaust valves. The camshafts sit in journals on the
top of the engine in the cylinder head and are held in place
by camshaft caps. The camshaft journals of the cylinder
head are drilled to create oil passages. Engine oil travels
to the camshafts under pressure where it lubricates each
camshaft journal. The oil returns to the oil pan through
drain holes in the cylinder head. The camshaft lobes are
machined into the solid camshaft to open and close the in-
take and the exhaust valves precisely the correct amount
at the correct time. The camshaft lobes are oiled by splash
action from pressurized oil escaping from the camshaft
journals.

ENGINE CONTROLS 1F – 85
DAEWOO V–121 BL4
IGNITION SYSTEM CHECK (1.4L/1.6L DOHC)
Circuit Description
The Electronic Ignition (EI) system uses a waste spark
method of spark distribution. In this type of EI system, the
Crankshaft Position (CKP) sensor is mounted to the oil
pump near a slotted wheel that is a part of the crankshaft
pulley. The CKP sensor sends reference pulses to the en-
gine control module (ECM). The ECM then triggers the EI
system ignition coil. Once the ECM triggers the EI system
ignition coil, both of the connected spark plugs fire at the
same time. One cylinder is on its compression stroke at
the same time that the other is on the exhaust stroke, re-
sulting in lower energy needed to fire the spark plug in the
cylinder on its exhaust stroke.
This leaves the remainder of the high voltage to be used
to fire the spark plug in the cylinder on its compression
stroke. Since the CKP sensor is in a fixed position, timing
adjustments are not possible or needed.
Test Description
The number(s) below refer to step(s) on the diagnostictable.
2. It is important to check for the presence of spark to
all of the cylinders to isolate the problem to either
EI system ignition coil inputs or outputs.
5. In checking the ECM outputs for the electronic
spark timing signal, it recommended to use an os-
cilloscope to view the varying voltage signals. In
measuring these outputs with a voltmeter, intermit-
tent errors may occur that cannot be seen by a volt-
meter.
6. After confirming ECM inputs for the electronic spark
timing to the EI system ignition coil are OK, it can
be determined that a faulty EI system ignition coil is
at fault.
11. After confirming proper CKP sensor inputs to the
ECM and no wiring problems present, it can be de-
termined that the ECM is at fault.
24. This step, along with step 25, checks for battery
voltage and a ground to the EI system ignition coil.
Ignition System Check (1.4L/1.6L DOHC)
CAUTION : Use only electrically insulated pliers when handling ignition wires with the engine running to prevent
an electrical shock.
Step
ActionValue(s)YesNo
11. Remove the spark plugs.
2. Inspect for wet spark plugs, cracks, wear, im-
proper gap, burned electrodes, or heavy de-
posits.
3. Replace the spark plugs as needed.
Is the repair complete?–System OKGo to Step 2
2Check for the presence of spark from all of the igni-
tion wires while cranking the engine.
Is spark present from all of the ignition wires?–System OKGo to Step 3
31. Measure the resistance of the ignition wires.
2. Replace any ignition wire(s) with a resistance
above the value specified.
3. Check for the presence of spark from all of the
ignition wires.
Is spark present from all of the ignition wires?30,000 WSystem OKGo to Step 4
4Is spark present from at least one of the ignition
wires, but not all of the ignition wires?–Go to Step 5Go to Step 12
51. Turn the ignition OFF.
2. Disconnect the Electronic Ignition (EI) system
ignition coil connector.
3. While cranking the engine, measure the volt-
age at the EI system ignition coil connector
terminal 1.
Does the voltage fluctuate within the values speci-
fied?0.2–2.0 vGo to Step 6Go to Step 7

ENGINE CONTROLS 1F – 111
DAEWOO V–121 BL4
TROUBLE CODE DIAGNOSIS
(1.4L/1.6L DOHC)
CLEARING TROUBLE CODES
Notice : To prevent Engine Control Module (ECM) dam-
age, the key must be OFF when disconnecting or recon-
necting the power to the ECM (for example battery cable,
ECM pigtail connector, ECM fuse, jumper cables,
etc.).When the ECM sets a Diagnostic Trouble Code
(DTC), the Malfunction Indicator Lamp (MIL) lamp will be
turned on only for type A, B and E but a DTC will be stored
in the ECM’s memory for all types of DTC. If the problemis intermittent, the MIL will go out after 10 seconds if the
fault is no longer present. The DTC will stay in the ECM’s
memory until cleared by scan tool. Removing battery volt-
age for 10 seconds will clear some stored DTCs.
DTCs should be cleared after repairs have been com-
pleted. Some diagnostic tables will tell you to clear the
codes before using the chart. This allows the ECM to set
the DTC while going through the chart, which will help to
find the cause of the problem more quickly.
DIAGNOSTIC TROUBLE CODES (1.4L/1.6L DOHC)
DTCFunctionError
TypeIlluminate MIL
P0107Manifold Absolute Pressure Sensor Low VoltageAYES
P0108Manifold Absolute Pressure Sensor High VoltageAYES
P0112Intake Air Temperature Sensor Low VoltageEYES
P0113Intake Air Temperature Sensor High VoltageEYES
P0117Engine Coolant Temperature Sensor Low VoltageAYES
P0118Engine Coolant Temperature Sensor High VoltageAYES
P0122Throttle Position Sensor Low VoltageAYES
P0123Throttle Position Sensor High VoltageAYES
P0131Front Heated Oxygen Sensor Low VoltageAYES
P0132Front Heated Oxygen Sensor High VoltageAYES
P0133Front Heated Oxygen Sensor No ActivityEYES
P0135Front Heated Oxygen Sensor Heater Circuit Not FunctioningEYES
P0137Rear Heated Oxygen Sensor Low VoltageEYES
P0138Rear Heated Oxygen Sensor High VoltageEYES
P0140Rear Heated Oxygen Sensor No ActivityEYES
P0141Rear Heated Oxygen Sensor Heater MalfuctionEYES
P0171Fuel Trim System Too LeanEYES
P0172Fuel Trim System Too RichEYES
P0222Main Throttle Idle Actuactor (MTIA) Low VoltageAYES
P0223Main Throttle Idle Actuactor (MTIA) High VoltageAYES
P0261Injector 1 Low VoltageAYES
P0262Injector 1 High VoltageAYES
P0264Injector 2 Low VoltageAYES
P0265Injector 2 High VoltageAYES
P0267Injector 3 Low VoltageAYES
P0268Injector 3 High VoltageAYES
P0270Injector 4 Low VoltageAYES
P0271Injector 4 High VoltageAYES
P0300Multiple Cylinder Misfire (Catalyst Damage)ABLINKING

1F – 112IENGINE CONTROLS
DAEWOO V–121 BL4
DTCIlluminate MIL Error
Type Function
P0300Multiple Cylinder Misfire (Increase Emission)EYES
P0327Knock Sensor Circuit Fault (1.4L DOHC)CnlNO
P0327Knock Sensor Circuit Fault (1.6L DOHC)EYES
P0335Magnetic Crankshaft Position Sensor Electrical ErrorEYES
P033658X Crankshaft Position Sensor Extra/missing PulseEYES
P033758X Crankshaft Sensor No SignalEYES
P0341Camshaft Position Sensor RationalityEYES
P0342Camshaft Position Sensor No SignalEYES
P0351Ignition Signal Coil A FaultAYES
P0352Ignition Signal Coil B FaultAYES
P0400Exhaust Gas Recirculation Out of LimitEYES
P0404Exhaust Gas Recirculation (EGR) PpendEYES
P0405EGR Pintle Position Sensor Low VoltageEYES
P0406EGR Pintle Position Sensor High voltageEYES
P0420Catalyst Low EfficiencyAYES
P0444EVAP Purge Control Circuit No SignalEYES
P0445EVAP Purge Control Circuit FaultEYES
P0462Fuel Level Sensor Low Voltage (1.6L DOHC Only)CnlNO
P0463Fuel Level Sensor High Voltage (1.6L DOHC Only)CnlNO
P0480Low Speed Cooling Fan Relay Circuit Fault (1.4L DOHC)EYES
P0480Low Speed Cooling Fan Relay Circuit Fault (1.6L DOHC)CnlNO
P0481High Speed Cooling Fan Relay High Voltage (1.4L DOHC)EYES
P0481High Speed Cooling Fan Relay High Voltage (1.6L DOHC)CnlNO
P0501Vehicle Speed No Signal (M/T Only)AYES
P0510Throttle Positon Switch Circuit Fault (1.4L DOHC)CnlNO
P0510Throttle Positon Switch Circuit Fault (1.6L DOHC)AYES
P0532A/C Pressure Sensor Low VoltageCnlNO
P0533A/C Pressure Sensor High VoltageCnlNO
P0562System Voltage (Engine Side) Too LowCnlNO
P0563System Voltage (Engine Side) Too HighCnlNO
P0601Engine Control Module Checksum ErrorEYES
P0604Engine Control Module RAM ErrorEYES
P0605Engine Control Module INMVY Write ErrorEYES
P0656Fuel Level Gauge High Circuit FaultCnlNO
P1181Variable Intake Manifold Solenoid Low VoltageEYES
P1182Variable Intake Manifold Solenoid High VoltageEYES
P1230Fuel Pump Relay Low Voltage (1.4L DOHC)CnlNO
P1230Fuel Pump Relay Low Voltage (1.6L DOHC)AYES
P1231Fuel Pump Relay High Voltage (1.4L DOHC)CnlNO
P1231Fuel Pump Relay High Voltage (1.6L DOHC)AYES
P1320Crankshaft Segment Period Segment Adaptation At LimitEYES