The 1998 Audi A4 requires G12 coolant. This type of coolant is specifically designed for Audi and Volkswagen vehicles and is made from a mixture of ethylene glycol, water, and corrosion inhibitors. G12 coolant is available in both concentrated and pre-mixed forms. If you are using concentrated coolant, you will need to mix it with distilled water in a 50/50 ratio.
Do not use G11 coolant in your 1998 Audi A4. G11 coolant is not compatible with G12 coolant and can cause damage to your engine.
Here are some tips for changing the coolant in your 1998 Audi A4:
* Make sure the engine is cool before you begin.
* Park your car on a level surface.
* Open the coolant reservoir cap.
* Drain the coolant from the radiator.
* Remove the thermostat housing and inspect the thermostat for damage.
* Replace the thermostat if necessary.
* Reinstall the thermostat housing and tighten the bolts.
* Fill the radiator with new G12 coolant.
* Close the coolant reservoir cap.
* Start the engine and let it run for a few minutes.
* Check the coolant level and add more coolant if necessary.
