How To Flush Audi Coolant Basic Overviews
Changing your Audi coolant isn't as difficult as you think. We've taken our years of Audi engine coolant service experience and put it to work for you! Blauparts provides some basic overviews on how to flush Audi coolant.
• 4 Cylinder Models
• 5 Cylinder Models
• V6 Models
• V8 Models
Important Audi Coolant Draining Flushing Filling Info
Draining alone can leave as much as 30 to 50% of the old coolant in the engine block. Before you change your coolant please read some important information regarding:
As an independent Audi service garage with over 23 years of hands-on experience, we know what fails on Audis and why. We feel that changing your fluids is one of the most important preventive maintenance routines. Yet, for many Audi owners, this seems to be one of the most neglected area of maintenance. Thoroughly flushing your fluids at the proper intervals can help your Audi reach 150,000 miles and beyond!
Blauparts® recommends changing 'long life' Audi coolant every 3 to 4 years. Why? The combination of chemical additives contained in coolant, responsible for retaining alkalinity and inhibiting corrosion within the engine's cooling system, over time become depleted. Similar to oil, Audi coolant eventually breaks down, becomes weak, and "gets dirty." For maximum corrosion protection and prolonged engine life, flushing Audi coolant every 3 to 4 years (40,000 – 50,000 miles) is imperative. Thoroughly flushing your Audi's coolant is most convenient when done during timing belt replacement.
Use ONLY Audi Vw G11, or G12 approved anti-phosphate, anti-amine, anti-phosphorous coolant! Do NOT use regular store bought coolant, which typically contains ethylene glycol and doesn't correspond with the specifications of an Audi cooling system. The specification or type of Audi coolant required for a particular model can be found stamped on the expansion tank (e.g. G11 or G12) as well as in the owner's manual under the coolant section. It's also good to note the color of your coolant (e.g. pink or purple). See Audi Coolant Features section below for further Audi coolant information and specifications.
What happens if you don't use correct approved Audi coolant?
Inferior coolant has an adverse reaction within an Audi cooling system. Poor quality coolant contaminates the system and eats away at metal, rubber, and plastic components. Obvious external indicators are bulging coolant hoses and white calcified residue oozing from coolant hose clamp mating areas (See Image 2). Not so obvious is lime and scale deposits that begin to build-up in the radiator core, restricting coolant flow and causing the engine to run hotter (especially in summer and warmer climates). All of this eventually causes serious engine problems (i.e. water pump failure - See Image 1). If your coolant is green or brown in color, thoroughly flush your cooling system immediately! You'll notice similar warnings in your owner's manual under the coolant section.
Remember to check the concentration (pH) of your Audi coolant on a regular basis. It's especially important to maintain the correct Audi coolant concentration during winter to protect your system against freezing temperatures. If your coolant concentration is weak, change it. Over time, weak or contaminated coolant (incorrect pH) can cause serious engine problems (i.e. water pump failure, as mentioned above). It's also important to note that approved Audi coolant comes in concentrated form. You MUST dilute the coolant using DISTILLED water to a 50/50 concentration. DO NOT mix normal tap water with coolant. Tap water varies in pH, mineral, and chemical content and can adversely affect your new coolant and cooling system. See Important Coolant Draining Flushing Filling Info section below for more information.
Blauparts® only stocks Audi coolants that meet approved Audi G11 and G12 coolant specifications. Dealer prices are often for a pre-mixed bottle of coolant. Our prices are for a concentrated 1.5L bottle, meaning more for your money!
Blauparts® recommends topping off your expansion tank with the same type of coolant that is currently in your Audi cooling system. For example, if you have G11 blue coolant, top off using G11 blue coolant. If you have G12 pink coolant, top off using G12 pink. However, for models currently using the G12 pink Audi coolant, we recommend upgrading to the G12+ / G12++ purple coolant the next time you thoroughly flush the cooling system (i.e. during timing belt replacement). Please read our Topping Off section.
Since 1946, Ravenol of Germany has been at the forefront of innovation, creating the highest quality oils and lubricants specific to advanced engine and transmission designs. Ravenol is recognized throughout Europe as a leader in fluid technology, keeping pace with the latest fluid specifications. They've succeeded in meeting and often exceeding the performance requirements set by leading European automobile manufacturers. Ravenol's innovative and technologically advanced lubricant product line has out performed many of the leading motor oil companies. They have been awarded formal approvals from leading vehicle manufacturers such as Mercedes Benz, Volkswagen, Audi, BMW, Porsche, Volvo, ZF, and many more. Ravenol motor oils provide superior lubricant protection reducing friction, resulting in optimal fuel economy and low emissions under all driving conditions. Ravenol lubricants are the best choice for the discriminating Audi owners.
Ravenol oils contain proprietary additives that offer unique profile characteristics specifically formulated for the advanced requirements of European cars. Most German automotive owners want only the best fluids. Blauparts believes in providing oils and lubricants that are formulated and engineered to meet your car's stringent specifications.
Ravenol Audi coolant is superior to leading brands of domestic and European brands of glycol based engine coolant. If your looking for an OEM replacement coolant for your Audi that has the "upper edge" in exceptional performance qualities, look no further! Why?
Advanced Audi Coolant Corrosion Protection
Ravenol Audi coolant is classified as a long life / lifetime coolant that provides stable and consistent corrosion protection for the long life of the engine. Ravenol coolant was specifically engineered for advanced high performance European engine designs and metal alloys. An environmentally friendly coolant that contains a unique OAT (organic acid technology) package that is phosphate, silicate, nitrite, borate, and amine free. Ravenol's OAT package reduces overall acidity within the cooling system, extending the life of cooling system components and related engine components (i.e. water pump, alloy radiators, plastic radiator and end caps, cylinder head manifolds, coolant hoses, cast and alloy engine blocks). The advanced profile package prevents scale build up and deposits in the cooling system thereby improving cooling system circulation.
Exceptional Cooling Performance
Ravenol Audi coolant outperforms other leading domestic and German brands of coolant. Ravenol's unique formulation and molecular profile improves cooling system flow for guaranteed heat transition away from vital internal engine components, especially the cylinder head. The undiluted boiling point of Ravenol's coolant is 370°F / 175° C, significantly reducing the risk of boil overs in high temperature climates and high performance RPM engine designs. Ravenol's coolant also provides maximum frost protection in extreme cold climates (i.e. -37° C 50/50 ratio and up to -52° C 60/40 ratio).
Do you want your Audi to reach 150,000 miles and beyond; or your new water pump to last 60,000 to 90,000 miles? Then, it is important to replicate the cooling system to a like new factory condition. Simply draining is not enough. Draining alone can leave as much as 30 to 50% of the old coolant in the engine block. Your cooling system should be free of any and all contaminants! You can not be lazy when it comes to coolant flushing and water pump replacement! Cutting corners now adds time, labor, and money later.
It's the installers responsibility to take the necessary time to thoroughly flush the cooling system. It has been noted that due to time constraints, inconvenience, and profit, many individuals, mechanics, and repair shops do not take the extra time needed to thoroughly flush the entire cooling system. Thoroughly flushing the coolant involves the engine block, radiator, heater core, and hoses.
Premature water pump failure (bearings and seals) can occur if you don't take the time to flush the entire cooling system and it's related components. Often when problems arise, such as an coolant leak, the new Audi water pump is blamed as the cause when in fact the opposite is true. It's usually because the installer neglected to follow this important step.
It is imperative that the Audi cooling system be thoroughly flushed of all accumulated silt and sediment buildup. All aftermarket cooling system additives, or stop leak products that may have been added to the cooling system (past or present) should be completely flushed! Thoroughly flushing the cooling system involves the engine block, radiator, heater core, and hoses.
Only use tap water to flush the entire cooling system. Do NOT use cooling system flush products. Many of these agents contain muriatic and/or other acids. Remnants of these acids left in the cooling system can cause your new Audi water pump to prematurely fail (see example images on related water pump replacement page).
Use ONLY Audi Vw G11, or G12 approved anti-phosphate, anti-amine, anti-phosphorous coolant! Do NOT use regular store bought coolant, which typically contains ethylene glycol and doesn't correspond with the specifications of an Audi cooling system. It's also important to note that approved Audi coolant comes in a concentrated form. You MUST dilute the coolant using DISTILLED water to a 50/50 concentration. DO NOT mix normal tap water with coolant. Tap water varies in pH, mineral, and chemical content and depending on these factors can adversely affect your new coolant and the cooling system. Never fill or top off with full concentrate G11 or G12 Audi coolant. Your Audi coolant should never exceed an coolant ratio of 60%. If it's over 60%, an inefficient Audi cooling system will result, decreasing flow through the radiator along with poor heat transfer through the engine block.
Important Reminder: Make sure that your local quick lube or mechanic isn't adding or topping off your system with incorrect coolant. Mixing factory approved coolant with any other coolant will cause an adverse chemical reaction with the existing coolant and contaminates the cooling system, thus affecting the longevity of the Audi water pump. If your coolant is green or brown in color thoroughly flush your cooling system immediately! You'll notice similar warnings in your owner's manual under the coolant section. Read the warnings on the coolant coolant bottle regarding improper use being harmful or fatal.
It's All Here! Blauparts® is your Audi fluid headquarters.
We only carry fluid that meets Audi approved specifications.
Audi Automatic Transmission Fluid
(aka Audi ATF Fluid)
Complete Audi ATF Fluid Filter Change Kits
Audi Manual Transmission Fluid / Gear Lube
Audi Power Steering Fluid
(aka Audi Hydraulic Fluid)
Audi Brake Fluid
Flushing your Audi's coolant is most easily done when replacing your timing belt.
Refer to the factory manual for Audi cooling system capacities and mixture ratios.
We recommend having an A.S.E. certified Audi mechanic change your Audi coolant. Always wear gloves and safety goggles when handling Audi fluids.
This is a basic overview of what is involved when flushing Audi coolant. It is not intended to replace the factory manual.
Please refer to the factory manual for detailed instructions.
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