Audi 80 Quiz
Brake System

Checking Brake Drum Condition

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

PROCEDURE

The friction surface inside the drum should be as smooth as possible.

If deep grooves or scoring are visible (caused by brake shoes worn down to the rivets), the drum can be machined.

The inside diameter of new brake drums is 230 mm.

After machining, the inside diameter must not exceed 231 mm; otherwise, both brake drums must be replaced.

Machined brake drums require thicker brake shoes.

Test yourself

A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.