Audi A4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
- Wheels and tires
Designations of tires
Rims
Wide-profile tires and rims
Check of pressure in tires
Check of a condition of tires
Replacement of wheels
Check of durability of fastening of wheel bolts
Unbalanced wheels
Purchase of new tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics
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Check of a condition of tires
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- Once completely turn each wheel.
- Alien bodies, for example, small stones, take out the narrow screw-driver, trying at the same time will not damage a profile of tires.
- The tire profile according to the law of 1992 has to be at least 1,6 mm in depth on all width of a protector.
- But for the sake of safety it is necessary to change tires at achievement of wear of 3 mm of residual width of a profile as wide-profile tires Audi A4 on the wet road emerge earlier, than narrow tires of cars of old models.
- For check of wear the eminences passing at identical distances across a working surface in profile grooves serve. They are designated on sides of tires by the letters "TWI" (Tread Wear Indicator – an indicator of wear of the tire).
- If these cambers are at one height with the drawing of a protector, then at the tire residual depth of 1,6 mm – it is necessary to change tires urgently.
- On the nature of wear of a profile it is possible to draw some conclusions about which it is written in the following section.
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Protector picture
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- The forward tires erased on outer side are not something unusual to Audi. The reason consists in the raised load of this site of a protector during turn.
- The profile erased on the one hand can indicate the wrong balancing of wheels; especially when one tire is erased obliquely.
- Strong deleting of the middle of a profile can be also a sign of too high pressure. This effect is shown especially strongly on back wheels. Or it arises at too bystry driving at which the protector surface is rounded.
- If both external shoulders of one tire are erased stronger, than the middle of a profile, then it means that the car a long time moved with too low pressure in tires.
- Uniform washing away in a profile point to the defective shock-absorber.
- If there is an uneven attrition in certain places, then it means that the wheel is unbalanced or the tire is damaged.
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Council: If it is necessary to remove a serviceable wheel, for example, for check of a brake, then in the beginning it should be noted the provision of a wheel concerning a nave. Otherwise after installation balancing will be broken. Further it is necessary to pay attention to that the brake disk did not rotate on a wheel nave. |
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