19 Identifying And Mixing Factory Fill Engine Coolants (GROUP 19, NO. 23-36)
Reference number: GROUP 19, NO. 23-36
Supersedes refnos: 2025303/1, 2025303/10, 2025303/11, 2025303/12, 2025303/13, 2025303/14, 2025303/2, 2025303/3, 2025303/4, 2025303/5, 2025303/6, 2025303/7, 2025303/8, 2025303/9, GROUP 19, NO. 11-19, GROUP 19, NO. 13-35, GROUP 19, NO. 13-41, GROUP 19, NO. 14-50, GROUP 19, NO. 15-62, GROUP 19, NO. 18-93, GROUP 19, NO. 18-94, GROUP 19, NO. 18-97, GROUP 19, NO. 19-98, GROUP 19, NO. 20-04, GROUP 19, NO. 22-27, GROUP 19, NO. 22-28
19 IDENTIFYING AND MIXING FACTORY FILL ENGINE COOLANTS
TECHNICAL SERVICE BULLETIN
| AUDI: | 1994-2024 All Audi Vehicles |
| GROUP: | 19 - Engine - Cooling System |
SERVICE INFORMATION
19 23 36 2025303/14 March 31, 2023. Supersedes Technical Service Bulletin Group 19 number 22-28 dated January 28, 2022, for reasons listed below.
| Model(s) | Year | VIN Range | Vehicle-Specific Equipment |
|---|---|---|---|
| All Audi Vehicles | 1994 - 2024 | All | Not Applicable |
CONDITION
| Revision | Date | Purpose |
|---|---|---|
| 14 | - | Revised header (Added Model Year) |
| 13 | 01/28/2022 | Revised Technical Background (Updated information) |
| 12 | 01/10/2022 | Revised header (Added Models and Model Year) |
Discontinuation and mixing of Audi-approved engine coolants.
TECHNICAL BACKGROUND
- G11, G12, and G12+ coolants have been replaced by an improved version.
- G12++ coolant (for service available) has been introduced in MY 2005 for all engines.
- G13 has been introduced in MY 2008 as the initial fill and service coolant.
- G12evo was introduced in MY19 as the initial fill and service coolant.
- Modern combustion engines make higher demands on the coolant. Audi is one of the few manufacturers whose coolant does not require changing. Therefore, the coolant has to be adjusted to the requirements and constantly developed further.
Tip: All model years can use - G12evo part number: Ready to use G-12E-050-1G-DSP except MY2015 A3 2.0TDI with engine code CRUA, which must still use G13. Only G12evo can be used in the Audi e-tron.
PRODUCTION SOLUTION
Not Applicable
SERVICE
Identifying and mixing factory fill engine coolants:
- Based on its color, identify which coolant the vehicle was filled with from the factory (Figure 1).
Tip: Figure 1 is shown for color identification only; coolant packaging may vary.
- Using the chart below, determine if the vehicle has the correct coolant (Figure 2). If a vehicle is found to have the incorrect coolant, drain and fill the coolant system using the procedures in ElsaPro.
Color Ratio description Green = Can be mixed in any ratio. Yellow = Mixing is possible but it will cause a reduction in corrosion protection. Red = Cannot be mixed. How to use this table:
- Check which coolant additive is in the cooling system.
- Look for the coolant additive in the upper horizontal row.
- Go down the green column. All coolant types of the green and yellow fields (described in the left vertical column) can be used. But preferably the coolant marked in a green field should be used.
Coolants can be mixed, as described in the chart, but it is always best practice to change the coolant due to reduced corrosion protection when coolants are mixed (exception: G12++ and G13 are fully compatible).
Only mix distilled water with coolant additives per ElsaPro.
Deionized water must not be used.
Drained coolant must not be reused.
NOTE: When the coolant is changed due to a cooling system issue, the cooling system should be drained using the Repair Manual procedures in ElsaPro and refilled with water.Then, run the engine for 15 minutes with the heater on to remove any residual coolant.
The final step is to drain and fill the system to the freeze protection ratio listed in ElsaPro.
Tip: If G11 is mixed with G12+, G12++, G13 or G12evo the coolant becomes brown (this is normal). The G12++ scale should be used when using the refractor T10007B to read the freeze protection for the G12evo coolant.
If it is unclear whether a cooling system is filled with G12, G13, or a mixture of the two, use the G13 scale of the refactors T10007A/B to read the freeze protection.
Cooling system drain and fill due to coolant mixing or incorrect coolant, is not covered by Warranty.
WARRANTY
This TSB is informational only and not applicable to any Audi warranty.
ADDITIONAL INFORMATION
All part and service references provided in this Technical Bulletin (2025303 ) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
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