expand_moreCooling fan is switched off at temperature
First stage
183.2–195.8°F183.2–195.8°F84–91°C
Second stage
195.8–208.4°F195.8–208.4°F91–98°C
expand_moreCooling fan is switched on at temperature
First stage
197.6–206.6°F197.6–206.6°F92–97°C
Second stage
210.2–221°F210.2–221°F99–105°C
Radiator cap opening pressure (Cooling system maximum pressure)
1.38–1.58 atm.1.4–1.6 bar1.4–1.6 bar
Thermostat opens at temperature
186.8°F186.8°F86°C
Overheating is really dangerous for Audi A4 S4 engines. Regularly check coolant level in the overflow reservoir. If the coolant level drops below minimum level inspect the cooling system for any signs of leakages and replace worn or damaged hoses. Use correct thermostat for your car.
Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2000 Audi A4 S4 user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.
Before doing any DIY service please check your insurance policy and Audi warranty policy for your region. In some regions DIY service may invalidate your warranty.
DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Audi A4 S4 service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.
Doing basic service for your 2000 Audi A4 S4 you're not only saving money, but also also improving your technical skills and learning something new.
2000 Audi A4 S4 generations
In 2000 Audi offered 2 generations of the A4 S4. Cooling system specifications may vary in different generations. Be sure that you are looking at the rigt modification.