Audi 80 Quiz
Cooling System

Coolant

In this manual: Cooling 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

The cooling system does not contain pure water but a mixture of antifreeze, which includes anti-freeze and anti-corrosion additives, and distilled water. Therefore, it is better to refer to it as coolant. The mixing ratio is 2:3 for European conditions and 1:1 for northern countries.

Engine Antifreeze Protection Down To Water Antifreeze
4-cylinder –25 °C –35 °C 4.2 L 3.5 L 2.8 L 3.5 L
5-cylinder –25 °C –35 °C 4.8 L 4 L 3.2 L 4 L
6-cylinder –25 °C –35 °C 4.4 L 5.5 L 6.6 L 5.5 L

Corrosion protection is just as important as frost protection. It prevents scale, rust and other corrosion products from forming in the cooling system. Therefore, the coolant with corrosion protection filled at the workshop should not be drained in spring; it should remain in the cooling system all year round. Audi workshops use their own antifreeze, "G 11 V8 B". The manufacturer also permits other products marked "according to TL VW 774 B".

Test yourself

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