acc DAEWOO LACETTI 2004 Service Repair Manual

NUBIRA/LACETTISERVICE NOTICE 0–3
1. HOW TO USE THIS MANUAL
.
This manual covers the repairs of NUBIRA/LACETTI
automobile which has been involved in accidents, and it
describes the work related to the replacement of dam-
aged body parts.
Please read through these instructions and familiarize
yourself with them before actually using this manual.
.
Note : Refer to NUBIRA/LACETTI Service Manual for
specifications, wire harness locations, safety stand sup-
port points, etc.
2. SPECIAL INFORMATION
.
Indicates a strong possibility of personal injury or equip-
ment damage if instructions are not followed.
.
Note : Gives helpful information.
.
CAUTION : Detailed descriptions of standard work-
shop procedures, safety principles and service op-
erations are not included. Please note that this manu-
al does contain warnings and cautions against some
specific service methods which could cause PER-
SONAL INJURY, or could damage a vehicle or make
it unsafe. Please understand that these warnings can-
not cover all conceivable ways in which service,
whether or not recommended by GM DAEWOO might
be done or of the possible hazardous consequences
of each conceivable way, not could GM DAEWOO in-
vestigate all such ways. Anyone using service proce-
dures or tools, whether or not recommended by GM
DAEWOO, must satisfy himself thoroughly that nei-
ther personal safety or tools, whether or not recom-
mended by GM DAEWOO, must satisfy himself thor-
oughly that neither personal safety or vehicle safety
will be jeopardized.
.
All information contained in this manual is based on the
latest product information available at the time of print-
ing. We reserve the right to make changes at any time
without notice. No part of this publication may be repro-
duced, stored in retrieval system, or transmitted, in any
form by any means, electronic, mechanical, photocopy-
ing, recording, or otherwise, without the prior written
permission of the publisher. This includes text, figures
and tables.

1–2 GENERAL INFORMATIONNUBIRA/LACETTI
1. GENERAL INSTRUCTION
This publication is designed to help you the body repair
technician with your specialized work. Vehicle bodywork
has changed a great deal over the years. As vehicles
have developed technically, vehicle bodywork has also
had to meet new requirements with design, changes to
reconcile apparently conflicting demands to name just a
few examples:
S strength and safety ; low weight
S spaciousness ; good aerodynamices
S high quality ; low price
.
The durability and ease of repair of the bodywork also
plays an important part.
.
Nowadays, the use of highly automated production
equipment makes it possible to maintain the tightest
tolerances and thus ensure a high level of quality.
.
When bodywork is damaged, the customer rightly ex-
pects it to be expertly repaired to the same quality stan-
dards.
.
At the same time, for his safety, the customer expects
you to have comprehensive knowledge of materials,
measuring and straightening methods, possible distor-
tion, optimum corrosion prevention and much more be-
sides.
.
This publication is designed to help you update your
knowledge and give you an idea of what you require to
rectify moderate or severe accident damage, for your
own safety and for the satisfaction of your customers.
2. IMPORTANT SAFETY NOTICE
2–1. BEFORE BEGINNING WORK
S Disconnect the battery to reduce the possibility of fire
caused by electrical shorts.
S Check for fuel leaks and repair as necessary.
S Remove the fuel tank and/or fuel lines if welding equip-
ment is to be used near the fuel system.
S Before welding, sanding or cutting, protect carpets and
seats with fire–proof covers.
S Follow standard safety practices when using toxic or
flammable liquids.
S Use standard safety equipment when spraying paint,
welding, cutting, sanding or grinding. Standard safety
equipment includes.
S Respirator and filter masks: Designed to filter out toxic
fumes, mist, dust or other airborn particles. Use a respi-
rator or filter mask designed to protect you from the haz-
ards of the particular job; some respirators, for example,
are designed to filter out only dust and airborn particles,
not toxic fumes.
S Safety goggles or glasses: Designed to protect your
eyes from projectiles, dust particles or splashing liquid.
S Gloves: Rubber gloves protect against corrosive chemi-
cals. Welding gloves protect against burns and abra-
sions caused by welding, sanding or grinding.
S Safety shoes: Non–slip soles protect against slipping.
Metal toe inserts protect against falling objects.
S Ear plugs: Protect eardrums from harmful noise levels.
.
2–2. DURING WORK
S Do not smoke while working near the fuel system.
S Deposit gas or solvent–soaked shop towels in an ap-
proved container.
S Brake lining contains asbestos, which can cause cancer.
Do not use an air hose to blow off brake assemblies: use
only an approved vacuum cleaner, and wear an ap-
proved filter mask or respirator.
S Always attach a safety cable when using a hydraulic ram
or a frame straightening table: do not stand in direct line
with the chains used on such equipment.

NUBIRA/LACETTIGENERAL INFORMATION 1–3
3. BODY SAFETY
Modern stressed–skin bodies are designed so as to
have a sturdy passenger cell protected by front and rear
crumple zones.
S In an accident the crumple zones are designed to con-
vert impact energy into deformation work.
S The shape, material and metal thickness must all be pre-
cisely matched.
Fig. 1 Body Shell
S Many years of experience, refined computational meth-
ods and expensive series of crash tests mean that GM
DAEWOO now builds bodies giving optimum deforma-
tion in the crumple zones in frontal or rear impacts.
Fig. 2 Crumple Zones
When repairing body damage, it is therefore imperative
to restore the original structure and strength in order to
guarantee the safety of the occupants.
4. LOADS ON BODY PARTS
S The earlier practice of making a distinction between load
bearing and non–loading bearing parts of vehicles with
a chassis and body is no longer justified now. Every part,
even the windows, contributes to the overall strength of
the vehicle.
.
Therefore, with modern GM DAEWOO bodies, one
talks of highly stressed and less highly stressed parts.
.
.
5. USE OF NEW HIGH–QUALITY
MATERIALS
S The requirement for reduced body weight has lead to a
reduction in the amount of steel used, e.g. through the
use of thinner sheet steels. This has been achieved with
HIGH STRENGTH SHEET STEELS, in spite of the
need to meet higher body strength requirements at the
same time. High strength steels have a tensile strength
and a yield strength as much as 30% higher than con-
ventional steel. These properties must not be destroyed
when carrying out repairs, e.g. by using excessive heat.
.
.
6. CORROSION PROTECTION
S The durability of the bodywork, its associated long–term
safety and retention of value largely depend on the cor-
rosion protection given to the sheet metal. Here, GM
DAEWOO takes a great deal of care in production.
S Therefore, this corrosion protection must be preserved
or restored when repairs are carried out.

1–4 GENERAL INFORMATIONNUBIRA/LACETTI
7. SUMMARY
S All GM DAEWOO vehicles are built to the highest stan-
dards in terms of styling and material properties.
S These high quality standards must be maintained when
accident repairs are carried out.
S Mistakes made when carrying out repair operations
such as straightening, welding sheet–metal parts, etc.
not only produce visible defects, but may also compro-
mise the safety of the vehicle.
S Mistakes made when restoring the corrosion protection
compromise durability.
.
.
8. ZINC TREATED STEEL PLATE
REPAIR
The zinc plated steel plate used in some panels of the
NUBIRA/LACETTI requires different repair techniques
than ordinary steel plate.
Fig. 31. Before spot welding the zinc plated steel plate, re-
move the paint from both sides of the flange to be
welded. Apply sealer to the flange after welding.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting or grind-
ing.
Note : Seal the sanded surfaces thoroughly to prevent
rust.
2. The electric continuity properties of zinc plated steel
plate is different from ordinary steel plate. When spot
welding, increase the current by 10–20%, or increase
the resistance welding time.
Increase the number of weld spots by 10–20% also.
Note : The MIG welding procedures for zinc plated steel
plate are the same as for ordinary steel plate.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
3. Before applying putty or body filler to the zinc plated
steel plate, sand the zinc plating thoroughly to promote
adhesion and prevent blistering.
Note : Use only epoxy–based putties and fillers on zinc
plated steel plate.

2–4 PREPARATIONS OF BODYWORK NUBIRA/LACETTI
2. CHECKPOINTS
S Accurate Inspection of Damaged Parts(Visual)
.
Seat Belts
Always replace the seat belt if :
1. The belt material is cut, punctured, burned or in any
way damaged.
2. The buckle or retractor does not work properly.
3. They were being worn at the time of a collision(also
check for damage at the seat belt anchor points).
4. Their condition is questionable.
.
Front Section :
1. Is there any bending, splitting, denting or other dam-
age to the suspension and its related parts?
2. Is there any deformation of the front panel or radiator
crossmember? Have any of the connected sections
come apart?
3. Are there any creases or distortion in the front wheel-
house or side frame? Have any of the connected sec-
tions come apart?
4. Is there any bending or twisting of the whole front
area?
5. Is there any deformation like creases, bulges, or dents
in the front pillar, dash panel, floor, etc.?
6. Is there any vertical twisting or misaligned clearance
in the door?
7. Is the windshield seal broken?
8. Is there any deformation in the vicinity of the top part
of the roof panel’s center pillar?
9. Is there any damage inside the automobile(is there
any twisting of the dash panel, or anything irregular with
the clearances or sheet–mounting parts)?
10. Is there any damage to the steering wheel? Is there
any deformation in the column and the column–mounted
parts?
11. Is there any oil or water leakage and damage to the en-
gine, transmission or brakes?
12. Is there any irregular noise in the gear changing opera-
tion, engine and transmission rotation?
13. Are there any traces of contact between the engine
block and the center crossmember ?
14. Is there any damage to brake or fuel lines, or wire har-
nesses?Rear Section :
1. Is there any twisting, bulging or denting of the rear floor
any rear bolsters? Have any of the connected sections
come apart?
2. Is there any irregular bulging or denting in the rear
fender?
3. Is there any distortion in the rear inner panel? Is there
any bending and denting in the vicinity of the rear pillar?
4. Is there any distortion or creasing is the rear wheel-
house and arch sections? Have any of the connected
sections come apart?
5. Is there anything irregular in the rear glass seal clear-
ance?
6. Is there any twisting or misalignment of the clearance
of the trunk lid opening section?
7. Is there any bending, splitting, denting or other dam-
age to the suspension and its related parts?
8. Is there any deformation of the rear floor crossmem-
ber, trunk floor panel and back panel? Have any of the
connected sections come apart?
.
Impact Beam :
Always replace the door assembly if :
1. The external force makes the impact beam of door in-
ner deform.
Always replace impact beam if :
2. The external force makes the impact beam of front
bumper and rear bumper deform.

NUBIRA/LACETTIWELDING AND TOOLS 3–3
S Plate thickness and tip diameter
Plate thickness
0.6mm0.9mm1.2mm1.6mm
Minimum inter-
vals4.5Ø5.0Ø5.5Ø6.0Ø
Fig. 3
1–3. WELDING STRENGTH TEST
.Even if you perform the welding in accordance with the
conditions, the strength of the welded sections may fluc-
tuate widely with drops in the voltage and other factors.
The quality of the welding cannot be evaluated unless
the welded sections are destroyed.
.
Provide yourself with a steel plate of the same thickness
and conduct a destruction test.
.
S If holes appear in the steel plates, this means that the
welding is standard strength.
S Drive a wedge between two panels near the nugget. If
the welded parts do not come apart and the diameter of
the nugget appears more than 3 mm, the welding should
be satisfactory.
Fig. 4

NUBIRA/LACETTIFRONT 4–11
3–2. REPAIR PROCEDURE
1. Remove the related parts.
S Parts to be removed when removing the front panel and
front wheelhouse.
S Parts on passenger side of dash panel lower which are
especially flammable.
S Instrument panel, wiring harness, related parts and oth-
ers.
Note : Remove according to part damaged.
2. Roughly pull out and straighten the damaged area to
approximately the original shape.
S Attach the car to the frame straightener by tightening the
underbody clamps at the horizontal pinch weld points.
S Before cutting off the damaged sections, pull them out
so that they are restored to the original shape.
S Roughly cut off the front longitudinal according to the ex-
tent of damage before roughly pulling out the damage
makes repair of the related parts difficult.
S Do not pull out more than necessary.
Note : Check the condition of the door and hinges.
3. Peel off the undercoat and sealer.
S Heat the undercoat and sealer at the welding areas of
the damaged parts with a gas torch and peel off the un-
dercoat and sealer with a steel spatula.
CAUTION : Be careful not to burn the fittings inside
the passenger compartment when heating.
4. Cut and pry off the front longitudinal.
Note : It’s not necessary to separate the wheelhouse
from the front longitudinal if the wheelhouse is to be re-
placed also.
S Center punch around the spot weld imprints on the
wheelhouse and other related parts.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the center punched areas.
S Cut off the front longitudinal with an air chisel, leaving the
welding flanges intact.
S Level and finish the burrs from the pried off spot welds
with a disc sander.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
Fig. 17
5. Mold damaged related parts.
S Fill any holes drilled by welding.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
S Reshape the wheelhouse and other damaged parts and
even out the welding flanges with a hammer and dolly.
Fig. 18
6. Cut the new front longitudinal to align it with body, then
set the wheelhouse and front panel.
S Cut the new front longitudinal with a hand saw and it will
be butt welded.
S Grind both sides of the welding section of the front longi-
tudinal and wheelhouse with a disc sander to remove the
paint and expose the steel plate.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
S Tighten the new front longitudinal against remaining
parts with the vise grips and pliers.
S Place a jack under the front longitudinal end and support
it, and measure the positions for correct setting.
S Set and clamp the front panel in place with the vise grips.

4–12 FRONTNUBIRA/LACETTI
Note : Use of jigs is recommended for correct positions
and check that the both front longitudinal and wheel-
house are parallel.
S Tack weld the clamped section for temporary installa-
tion.
7. Perform the main welding.
S Weld as much as possible with the jig still mounted.
S Make MIG or gas welds at the butt joints at the front lon-
gitudinal, carefully.
Fig. 19
S Spot weld the wheelhouse with the front longitudinal
flange areas and front panel.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
S Perform a trial welding first, and check the welding con-
dition.
S Increase the number of spot by 20% for areas to be spot
welded.
Fig. 20
S Level the weld beads at the longitudinal butt joints area
with disc sander.
S Make the stiffener(Thickness: 2.8 mm Min., Width: 80
mm) according to the form of longitudinal butt joint areasand weld the stiffener at the longitudinal butt joint areas
with MIG welder.
Fig. 21
8. Finish the welding areas.
S Level the gas or MIG welded areas with disc sander.
S Use a hammer and dolly to even out the wheelhouse and
longitudinal flanges for a close fit.
9. Apply the sealer.
S Apply the sealer to the joint areas of the dash panel lower
and floor panel areas.
10. Apply the undercoat.
S Undercoat to the joint and overlapped areas of the front
floor, longitudinal under side and the inside of front, rear
wheelhouse.
11. Apply the paint.
CAUTION
S Ventilate when spraying paint. Most paint contains sub-
stances that are harmful if inhaled or swallowed. Read
the paint label before opening paint container.
S Avoid contact with skin. Wear an approved respirator,
gloves, eye protection and appropriate clothing when
painting.
S Paint is flammable. Store in a safe place, and keep it
away from sparks, flames or cigarettes.
12. Coating the anti–rust agents.
S Coating the anti–rust agents to the end of front panel
side and the front door hinge areas.
13. Install the related parts.
S Clean the passenger compartment.
S Wiring harness, instrument panel and related parts.
S Parts of the passenger compartment.
S Chassis components.
S Engine, radiator and related parts.
S Aircon condenser and related parts.
S Head lamps and fenders.
S Heed, radiator grill, and bumper.
S Others.
S Install in the reverse order in which they were removed.

10–2 RUST PREVENTIONNUBIRA/LACETTI
1. ZINC TREATED STEEL PLATE
REPAIR
Avoid puttying as much as possible when repairing a
new car. Use alternative methods as much as possible.
.
CAUTION
S Most paints contain substances that are harmful if in-
haled or swallowed. Read the paint label before openingthe container. Spray paint only in a well ventilated area.
S Cover spilled paint with sand, or wipe it up at once.
S Wear an approved respirator, gloves, eye protection and
appropriate clothing when painting. Avoid contact with
skin.
S If paint gets in your mouth or on your skin, rinse or wash
thoroughly with water. If paint gets in your eyes, flush
with water and get prompt medical attention.
S Paint is flammable. Store it in a safe place, and keep it
away from sparks, flames or cigarettes.
Operation
Tools/MaterialsProcedureRemarks
1. Prep the repair
area.Double–action sander, #80 sand-
paper.Sand the area with a double–action sander
and #80 sandpaper. Clean with wax and
grease remover..
2. Apply putty
Note : Putty can be
applied after priming
as described in step 4.
Epoxy–based putty.
S Mix the putty and hardener ac-
cording to the manufacturer’s di-
recctions.
S Polyester resin putty. Body filler.Apply in several thin coats if necessary. Try
to avoid leaving pinholes in the putty.
S Follow the manufacturer’s recommenda-
tions for preparaton.
.
3. Sand and clean
the puttied area.Double–action sander, orbital
sander, hand sanding file, #80,
#120, #240 sandpaper, wax and
grease remover, shop towels.Rough–sand the area with a double– action
sander and #80 sandpaper, then sand with
#120 sandpaper. Featheredge with #240
sandpaper. Clean with wax and grease re-
mover..
4. Coat with primer.
Note : Apply to bare
sheet metal and put-
tied area.
Epoxy–based primer and harden-
er, epoxy thinner.
S Mix and thin the primer accord-
ing to the manufacturer’s direc-
tions.
Apply 2–4 coats, allowing sufficient flash time
between coats.
Force dry at 60–70
C(140–158
F) for at
least 30 minutes.Spray to
a thick-
ness of
30–35
microns.
5. Sand and clean
the whole area.Double–action sander, #400
sandpaper, wax and greases re-
mover, shop towels.Sand the whole area to be repainted with a
double–action sander and #400 sandpaper.
Blow off with compressed air. Clean with wax
and grease remover..
6. Coat the whole
area to be repainted
with primer/ surfacer.
Polyester/urethane resin primer/
surfacer.
S Mix and thin the primer accord-
ing to the manufacturer’s direc-
tions.
Apply 2–4 coats, allowing sufficient flash time
between coats.
Force dry at 60–70
C(140–158
F) for at
least 30 minutes.Spray to
a thick-
ness of
30–35
microns.
7. Sand and clean
the whole area to be
repainted.Hand sanding file, double–action
sander, #240, #320, #400, #600
sandpaper, wax grease and re-
mover, shop towels.Sand the repair area by hand with #240
sandpaper until it’s level. Sand the whole
area to repainted with #320– 600 sandpaper.
Clean with wax and grease remover..
8. Top–coat the
whole area to re-
painted.
Acrylic urethane resin top coat
paint, hardener, and thinner.
S Mix and thin the paint according
to the manufacturer’s directions.
Apply 2–4 coats, allowing sufficient flash time
between coats.
Force dry at 60–70
C(140–158
F) for at
least 30 minutes.Spray to
a thick-
ness of
40–50
microns.