How to Change Coolant 2004-09 Audi A4
Created on: 2016-05-27
Watch this video to learn how to change your coolant. The experts at 1A Auto will show you how to drain and fill the radiator fluid on your 04-08 Audi A4.
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step 1 :Draining the Coolant
- Remove the coolant cap
- Remove the quarter-turn flat blade fasteners at the bottom of the bumper
- Remove the Phillips screws at the front of the wheel wells
- Remove the screws in the wheel wells with a flat blade screwdriver
- Insert a 3/8 fuel line into the coolant fitting
- Open the drain
- Allow the coolant to drain into a drain pan
- Close the drain plug
- Tighten the screws in the wheel wells with a flat blade screwdriver
- Tighten the quarter turn flat blade fasteners at the bottom of the bumper
- Tighten the Phillips screws at the front of the wheel wells
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step 2 :Refilling the Coolant
- Insert a funnel into the reservoir
- Fill the reservoir with G-12 Volkswagon or Audi approved coolant
- Run the vehicle with the cap off
- Let the air bubbles out of the tank
- Fill the tank as it empties until there are no more bubbles
- Once the heat/air has stabilized, remove the funnel and reinstall the cap
- Turn the vehicle off
Tools needed
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Flat Blade Screwdriver
Phillips Head Screwdriver
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Remove the quarter turn flat blade fasteners at the bottom of the bumper. Normally, there are three here, there are several underneath. A lot of these bumpers are missing these fasteners. They've become cracked, damaged, lost, what have you, so just find all the ones you can. A few more at the back. A couple of Phillips, occasionally these are torques at the front of the wheel wells. Remove the screws inside the wheel well.
Before draining the coolant, remove the cap on your expansion tank. Locate the coolant drain on the bottom of your radiator on the driver's side. We're going to use a 3/8" fuel line on the fitting into a drain bucket. Open the drain and allow your coolant to drain. Be sure that your cooling system is completely drained before refilling.
Ensure that the drain plug on your radiator is closed, install your funnel, and fill your car with G-12 Volkswagen and Audi approved coolant. When the reservoir is full and the level is no longer dropping into the rest of the cooling system, with the cap off, run the vehicle and allow all the air bubbles to make their way out of the expansion tank. Your coolant level will drop when this happens. Constantly keep that level up in the tank until you have no more air bubbles and no more draining of the coolant down into the system.
Once your coolant level, your engine temperature, and your heat have all stabilized for a few minutes, you're safe to remove your funnel, reinstall your cap, and shut your vehicle off. If the level stays normal after shutdown, you're good to go.
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