Geely Emgrand X7. Manual part — 710

12.13.3 Diagnostic information and procedures

12.13.3.1 Common Defects Example and Treatment for Paint Surface

Notes:

Making the box in the table black indicates the treatment for this defect.

Description Formation

causes

Treatment

Powder

The paint film is eroded strongly. Such as strong
ultraviolet ray, paint ratio during construction is
wrong.

Coating has low resistance to sun and bad weather.

Vehicle cleaning is not regular or thorough.

Incorrect choice of cleaning agents or too coarse
polishing wax.

1. Polishing Treatment. □

2. Conventional grind and polishing

treatment. □

3.

Treated with deep grinding,

polishing and modification. □

4. Partial

paint

repair.

■

Plastic Paint
Peeling

Poor adhesion between the coating and the substrate
or outer coating is too hard relative to under coating.

Coating is too thick or erosions are caused by water
vapor, acid and alkali in the air.

Under coating is treated incorrectly; there are pinholes
and defects in the outer paint.

1. Polishing

Treatment.

□

2. Conventional grind and polishing

treatment. □

3. Treated with deep grinding, polishing

and modification. □

4. Partial

paint

repair.

■

Cracking

Primer is inadequately stirred prior to spraying.

Base coating is too thick.

Middle coating is too thick.

1. Polishing

Treatment.

□

2. Conventional grind and polishing

treatment. □

3.

Treated with deep grinding,

polishing and modification. □

4. Partial

paint

repair.

■

Bird
Droppings
Erosion

1. Erosion by bird manure dropping.

1. Polishing treatment (mild erosion).

■

2. Conventional grind and polishing

treatment (medium erosion). ■

3. Treated with deep grinding, polishing

and modification. □

4. Partial paint repair (severe

erosion). ■

Scratch

Film with low hardness.

Scratch caused by hard objects.

1. Polishing treatment (minor

scratches). ■

2. Conventional grind and polishing

treatment (thick scarring). ■

3.

Treated with deep grinding,

polishing and modification. □

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4. Partial paint repair (scratched). ■

Corrosion

Thin film of edges.

Corrosion caused by hurt generated by knocks.

Acid and alkali erosion.

1. Polishing

Treatment.

□

2. Conventional grind and polishing

treatment. □

3.

Treated with deep grinding,

polishing and modification. □

4. Partial paint repair (serious rusted

metals need to be repaired before
painting). ■

Paint Peeling

Poor adhesion between the coating and the substrate
or outer coating is too hard relative to under coating.

Coating is too thick or erosions are caused by water
vapor, acid and alkali in the air.

3. Under coating is treated incorrectly; there are
pinholes and defects in the outer paint.

1. Polishing

Treatment.

□

2. Conventional grind and polishing

treatment. □

3.

Treated with deep grinding,

polishing and modification. □

4. Partial paint repair (serious rusted

metals need to be repaired before
painting). ■

Acid Rain
Erosion

1. Acid Rain Erosion

1. Polishing treatment (mild erosion).

■

2. Conventional grind and polishing

treatment (medium erosion). ■

3.

Treated with deep grinding,

polishing and modification. □

4. Partial paint repair(severe erosion).

■

Gloss

1. Film is eroded by the acid, alkali, electric arc,
sea water and other strong corrosive salty spray.

Incorrect maintenance methods in harsh conditions.

3. Poor paint durability.

4. Incorrect paint mixture ratio leads to paint
durability deterioration.

1. Polishing treatment (mild loss of

light). ■

2. Conventional grind and polishing

treatment (moderate loss of light).
■

3.

Treated with deep grinding,

polishing and modification. □

4. Partial paint repair (severe loss of

light). ■

Bubbling

When film is exposed to a humid environment for a
long period, water vapor will infiltrate into paint film,
and water and gas bubbling will be generated when
temperature rises.

Substrate is corroded by infiltrated materials.

Gasoline, acid, alkali and other erosion for film.

1. Polishing Treatment. □

2. Conventional grind and polishing

treatment. □

3.

Treated with deep grinding,

polishing and modification. □

4. Partial paint repair (serious rusted

metals need to be repaired before
painting). ■

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12.13.4 Removal and installation

12.13.4.1 Common Coating Film Defect Treatment Process Example

1. Before polishing, clean the surface to be polished

with degreasing materials.

NL12-1000b

2. Firstly fully soak a sponge and squeeze excessive

water.

3. Apply a small amount of polishing wax to the

surface and adjust the polishing machine speed.

NL12-1001b

4. Put the wool ball onto the surface, turn on the

machine with a speed at 2,500-3,000 r/ min.
Then, slightly press for 3-5s for polishing
treatment.

Notes:

During operation, keep the machine stable and move
gently. Do not operate too long to avoid overheating,
as the paint will be damaged by the heat.

5. Use a cleaning cloth to wipe the excessive wax.

NL12-1002b

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12.13.4.2 Conventional Grind and Polishing Treatment Process Example

1. Before polishing, clean the surface to be polished

with degreasing materials.

NL12-1000b

2. Apply an appropriate amount of polishing wax to

the surface and adjust the polishing machine
speed.

NL12-1003b

3. Put the wool ball onto the surface, turn on the
machine with a speed at 2,500-3,000 r/ min.

Notes:

During operation, keep the machine stable and move
gently. Do not polish too long. Keep the polishing
time as short as possible, and the polishing area as
small as possible.

4. Wet sufficiently the sponge and remove excessive
moisture by compressing it. Apply a small amount of
polishing wax to the surface to be polished and start
the engine to a RPM of 2,500-3,000r/min after
pressing the sponge to the surface to be polished.
Then, slightly press for 3-5s for polishing treatment.

Notes:

During operation, keep the machine stable and move
gently. Do not operate too long to avoid overheating,
as the paint will be damaged by the heat.

NL12-1004b

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