> Diagnostics of noise, scratch and jingle. Daewoo Matiz (since 1997 of release)
Daewoo Matiz since 1997 of release
1. The general data
2. Maintenance service
3. The engine
4. Transmission
5. A running gear
6. A steering
7. Brake system
8. Systems of heating, ventilation and air-conditioning
9. A body electric equipment
10. A body
10.1. An interior
10.2. Seats
10.3. Glasses and mirrors
10.4. Elements of external furnish of a body
10.5. Bumpers
10.6. Doors
10.7. A roof
10.8. Seat belts
10.9. A forward part of a body
10.10. A back part of a body
10.11. A frame and a body skeleton
10.12. Restoration of tightness and elimination of scratches of a body
10.12.1. Tightness diagnostics
10.12.2. The general test
10.12.3. Local test (a stain method)
10.12.4. Test by a water stream
10.12.5. Tightness restoration
10.12.6. Elimination негерметичности glasses
10.12.7. Diagnostics of noise, a scratch and jingle
10.12.8. Elimination of noise, a scratch and jingle
11. Schemes электроборудования
 




سرور مجازی





10-12-7-diagnostika-shuma-skripa-i-drebezzhaniya.html

10.12.7. Diagnostics of noise, a scratch and jingle

The assistant should operate the car while the technician reveals a place where there is a noise.
At carrying out of tests, precisely define a place of occurrence of noise. Often there are external and internal noise. At the termination of the repair, any malfunctions, check up occurrence of noise and eliminate them. At carrying out of test, definition and noise elimination use:
- A stethoscope or a vacuum hose;
- A sticky tape;
- A sealant;
- An indelible pencil;
- A screw-driver.
For carrying out of road tests:
- Define a technological route which includes smooth and direct sites of road. The movement direction gets out in all four - directions (the north, the south, the east and the West);
- Choose a direction with small traffic or extraneous noise which would interfere with a course of tests;
- Operate the car with a speed at which it is possible to reveal noise or while noise will not appear. Do not exceed regulated - restrictions of speed.
External noise can appear:
- At movement against a wind;
- Behind glasses of doors and when the car begins movement.
Noise can be eliminated the sticky tape pasted on various ledges and bends of a body.
Internal noise — air vortical leak of the car.
To reveal leak, stick with a sticky tape of connection of a rack of a body with glass to close possible cracks. It will cause growth of pressure of air and noise in the car will amplify;
Use a stethoscope or a vacuum hose to reveal a noise place.
Temporarily eliminate noise by a sticky tape and continue check to define, whether noise is eliminated or there are other cracks.
When all cracks are found, make repair work with appropriate carefulness.
Diagnostics of noise, scratch and jingle, their possible reasons of display and elimination methods are resulted in tab. 10.4.

Table 10.4      Diagnostics of noise, a scratch and jingle, their possible reasons of display and elimination methods
Plausible reason
Elimination method
The scratch which is starting with the lateral directing
The inadequate image fixes a brake highway
Fix tubes of brake system a sticky tape and hear, whether there is a scratch.
Establish plastic tapes to guarantee rigid communication of brake tubes
Scratch under the car at high frequency of rotation of a cranked shaft
The thermofilter touches the body bottom
Lift the car and visually examine it.
Bend slightly a thermofilter to avoid contact to the body bottom
Scratch from a forward part of the car in cold weather
Stabilizer plugs have lost the properties
On not heated-up car spend test arrival on rough road and examine a forward suspension bracket.
Remove stabilizer plugs, wind with a sticky tape the stabilizer. Establish plugs of the stabilizer over a sticky tape
Knock from a back part of the car
The inadequate image fixes a spare wheel in a luggage carrier compartment
Open a door of a luggage carrier and examine fastenings of a spare wheel and the tool.
More strongly tighten fastening of a spare wheel and the tool.
Conduct road test; whether check up knock has disappeared
Jingle of glass from a back part of the car at engine start-up
The lock of a door of a luggage carrier is not adjusted
Conduct test tests of the car; check up jingle presence.
Ослабьте nuts of fastening of the lock also move the lock more low
Knock in the doorway
Ослаб the cylinder of the lock of a door
Remove an upholstery of a door and check up fastening of the cylinder of the lock.
Tighten bolts of fastening of the cylinder of the lock
Jingle of electric sockets under a door upholstery
Remove an upholstery of a door and establish a knock source.
Remove an upholstery of a door and fix electric sockets properly
Scratch at opening of doors
There is not enough greasing in pins of loops
Open a door and establish a scratch source.
Wipe pins of loops kerosene and put lubricant
The terminator of opening of a door is insufficiently greased
Open a door and establish a scratch source.
Wipe the terminator of opening of a door kerosene and put lubricant
Scratch from under the console at a gear change (in cold weather at the cold engine)
Malfunction in a protective cover of the lever of a gear change
Switch the lever of a gear change and establish a scratch source.
Remove the console, replace a protective cover or add talc
Scratch from under facing of the panel of devices
Friction of facing of the panel of devices about the control panel
Conduct road test of the car and be convinced available a scratch.
Remove facing of the panel of devices and establish on edges a felt tape

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10.12.6. Elimination негерметичности glasses
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10.12.8. Elimination of noise, a scratch and jingle