Audi 80 Quiz
Body Electrical System

V-belt tension

In this manual: Body Electrical 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

With moderate thumb pressure, the V-belt can be pressed in between the two pulleys as follows:

Engine V-belt for Belt deflection under thumb pressure, approx.
4-cylinder up to Sept. 1991 alternator 10 mm
All 4-cylinder water pump, power steering pump 5 mm
All 4-cylinder air conditioning compressor 5 mm
5-cylinder alternator 5 mm
5-cylinder power steering pump 5 mm
5-cylinder air conditioning compressor 5 mm

If a new V-belt is fitted, check its tension again after approx. 100 km and retighten if necessary; new belts stretch more at first.


Poly-V belt tension

The poly-V belt on the 4-cylinder engine, on models produced after September 1991, must be re-tensioned during inspection. So loosen the belt and set the tension according to the procedure described in the next paragraph.

The poly-V belt on the 6-cylinder engine always has the correct tension thanks to the automatic tensioner.

Test yourself

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