| NOTICE |
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Do Not Mix Brands and/or Types of Products. Mixing other products with Cat ELC reduces the effectiveness of the Cat ELC and shortens the Cat ELC service life. Use only Cat products or commercial products that have passed the Caterpillar EC-1 specification for premixed or concentrate coolants, and that have also passed the additional requirements for EC-1 as found in the coolant section of this Special Publication. Use only Cat ELC Extender with Cat ELC. Do NOT mix brands or types of coolants. Do NOT mix brands or types of SCA. Do NOT mix brands or types of extenders. Do NOT mix SCAs and extenders. Failure to follow these recommendations can result in shortened cooling system component life. |
| NOTICE |
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Use Only Approved SCAs and Extenders. Conventional coolants require the maintenance addition of SCA throughout their expected life. Do NOT use an SCA with a coolant unless specifically approved by the coolant supplier for use with their coolant. It is the responsibility of the coolant manufacturer to ensure compatibility and acceptable performance. In order to ensure expected performance, EC-1 coolants require the one time maintenance addition of an extender at coolant service mid-life. Do NOT use an extender with a coolant unless the extender has been specifically approved for use by the coolant manufacturer for use with the coolant. It is the responsibility of the coolant manufacturer to ensure compatibility and acceptable performance. Failure to follow these recommendations can result in shortened cooling system component life. |
The following two types of coolants may be used in Cat diesel engines:
Preferred - Cat ELC (Extended Life Coolant) or a commercial extended life coolant that meets the Caterpillar EC-1 (Engine Coolant -1) specification.
Acceptable - Cat DEAC (Diesel Engine Antifreeze/Coolant) or a commercial heavy-duty antifreeze/coolant that meets "ASTM D4985-05" or "ASTM D6210-06" specifications
Chemical Requirements for New Coolant (50 volume % diluted)
Preferred Coolants - Cat ELC or EC-1
- Organic Additive Technology (OAT) based on a combination of a monocarboxylic acid and a dicarboxylic acid
- Phosphate, borate, and silicate free
- Minimum typical tolyltriazole level of 900 ppm
- Minimum typical nitrite level of 500 ppm
- Coolants that are prediluted at the coolant manufacturer must be diluted with water that meets Reagent 4 ("ASTM D1193") requirements
Acceptable Coolants - Cat DEAC, "ASTM D6210-06", or "ASTM D4985-05" (after the addition of the specification required SCA precharge)
- A minimum concentration of nitrite (as NO2-) of 1200 ppm
- A minimum silicon concentration of 100 ppm
- A maximum silicon concentration of 275 ppm
- Coolants that are prediluted at the coolant manufacturer must be diluted with water that meets Reagent 4 ("ASTM D1193") requirements
Note: "ASTM D4985" and "ASTM D6210" require coolants that are properly dosed with SCA and that are in a properly maintained cooling system in normal service to be suitable for use for a minimum of one year ("ASTM D4985") and 2 years ("ASTM D6210"). The suitability for use requirement is the direct responsibility of the coolant manufacturer and SCA manufacturer.
| NOTICE |
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Do not use a commercial coolant/antifreeze that only meets the ASTM "D3306" specification. This type of coolant/antifreeze is made for light duty automotive applications. Use only the coolant/antifreeze that is recommended. |
Caterpillar recommends a 1:1 mixture of properly inhibited distilled or deionized water and glycol. This mixture will provide optimum heavy-duty performance as a coolant/antifreeze.
Note: Cat DEAC does not require a treatment with an SCA at the initial fill. However, a commercial heavy-duty coolant/antifreeze that only meets "ASTM D4985", by specification, WILL require a treatment with an SCA at the initial fill. A commercial heavy-duty coolant/antifreeze that meets the "ASTM D6210" specification WILL NOT require a treatment with an SCA at the initial fill. Read the label or the instructions that are provided by the manufacturer of the commercial heavy-duty coolant/antifreeze.
Note: When adding SCA at initial fill to a coolant/antifreeze that only meets the "ASTM D4985", ensure the SCA is compatible with the antifreeze/coolant. For example, a HOAT coolant that meets the "ASTM D4985" specification may not be compatible with an SCA designed for use with conventional coolants. It is the responsibility of the coolant manufacturer to provide sources of compatible SCAs. It is the responsibility of the coolant manufacturer and SCA manufacturer to demonstrate a positive influence on reducing cavitation corrosion in an operating diesel engine.
Note: These coolants WILL require a treatment with a supplemental coolant additive on a maintenance basis.
Note: When adding SCA at initial fill to a coolant/antifreeze that only meets the "ASTM D4985", it is a collective responsibility of the user, coolant manufacturer, and SCA manufacturer to ensure the SCA is compatible with the antifreeze/coolant based on the recommendations provided by the coolant manufacturer and SCA manufacturer. One of the test methods required to be used to help ensure SCA compatibility with the antifreeze/coolant concentrate is "ASTM D5828-97". 6% SCA in the solution that is 60 parts antifreeze/coolant of interest, 34 parts water, and 6 parts SCA must have no more than 0.1 mL of formed insolubles. 12% SCA in a solution that is 60 parts antifreeze/coolant of interest, 28 parts water, and 12 parts SCA must have no more than 2 mL of formed insolubles. The SCA manufacturer is responsible for ensuring their SCA is compatible with water meeting the "Caterpillar Minimum Acceptable Water Quality Requirements" as found in this Special Publication and as found in "ASTM D6210-06", Table X1.1.
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All Cat diesel engines equipped with air-to-air aftercooling (ATAAC) require a minimum of 30 percent glycol in order to help prevent water pump cavitation. |
Note: Refer to the engine Operation and Maintenance Manual for exceptions.
| Service Life Before Flushing and Before Refilling | |
| Coolant | Service Life (1) (2) (3) |
| Cat ELC | 965,606 kilometers (600,000 miles) 12000 hours 6 years (4) |
| Commercial coolant that meets the Caterpillar EC-1 specification | 482,803 kilometers (300,000 miles) 6000 hours 6 years (5) |
| Cat DEAC | 321,869 kilometers (200,000 miles) 3000 hours 3 years |
| Commercial Heavy-Duty Coolant/Antifreeze that meets "ASTM D4985" or "ASTM D6210" | 241,402 kilometers (150,000 miles) 3000 hours 1 year |
| ( 1 ) | Whichever comes first. |
| ( 2 ) | Refer to the specific engine Operation and Maintenance Manual, "Maintenance Interval Schedule" for the service interval for the cooling system water temperature regulator. |
| ( 3 ) | Cat truck engines with excessive idle time must reduce coolant drain intervals to one-half of the stated kilometers/miles recommendations, or base the coolant service life on the stated hours. Engine hours of operation are reported in the ECM (Electronic Control Module). Two examples in which engines may experience excessive idle time are engines that are normally operated in city pickup and delivery applications, and over the road truck applications in which the engines are kept running in order to provide heat and/or air conditioning while the driver sleeps. Refer to the Operation and Maintenance Manual for the specific engine for additional information. |
| ( 4 ) | Cat ELC Extender must be added at 6000 service hours or one half of the service life of the Cat ELC. |
| ( 5 ) | An extender must be added at 3000 service hours or one half of the service life of the coolant. |
Note: These coolant change intervals are only achievable with annual S·O·S Services Level 2 coolant sampling and analysis.
Cat ELC, Cat DEAC, Cat Extender, and Cat SCA are available in several container sizes.
| Part Numbers of Coolant | ||
| Description | Size | Part Number (1) |
| Cat DEAC (Concentrate) |
Bulk | 2P-9868 or 156-2649 |
208.2 L (55 US gal) |
8C-3686 238-8653 (2) |
|
3.8 L (1 US gal) |
8C-3684 238-8651 (2) |
|
| Cat ELC (50/50 Premix) |
Bulk | 156-2653 |
208.2 L (55 US gal) |
101-2845 238-8650 (2) |
|
18.9 L (5 US gal) |
129-2151 238-8649 (2) |
|
3.8 L (1 US gal) |
101-2844 238-8648 (2) |
|
| Cat ELC (Concentrate) |
3.8 L (1 US gal) |
119-5150 238-8647 (2) |
| Cat ELC Extender | 0.946 L (1 qt) 3.8 L (1 US gal) |
119-5152 210-0786 |
| ( 1 ) | The availability of part numbers will vary by the region. Consult your Caterpillar dealer. |
| ( 2 ) | With embitterment. Embitterment makes the coolant taste bad. This is done in order to deter accidental human or animal ingestion of the coolant/antifreeze. |