Audi 80 Quiz
Brake System

Measuring Disc Brake Pad Thickness

In this manual: Brake System
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

Disc brake pads on the front wheels are large enough to last up to 50,000 km. Nevertheless, do not neglect regular visual inspection:

PROCEDURE

The minimum pad thickness, excluding the backing plate, must be 2 mm. The backing plate itself, that is, the metal plate to which the friction material is bonded, is about 5 mm thick.

For a quick check, with the wheel cover removed, shine a lamp through the opening in the wheel and assess the lining thickness.

A more accurate check is performed with the wheel removed. Place a ruler against the pad and measure as shown in the upper illustration. Do not forget to inspect the friction lining on the inner side!

Измерение толщины колодок тормозного механизма передних колес:
Measuring Front Brake Pad Thickness:
1 – lining material;
2 – metal backing plate.

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