- Silicate-free engine coolant for use in engines
- Corrosion protection based on OAT technology for all metal alloys, including aluminum
- Concentrate with antifreeze properties
- Freeze protection down to -45 °C
- Long-term stability
- Excellent cavitation protection properties
- Effective heat dissipation
- High boiling point to prevent overheating
- Contains defoamers that ensure uniform coolant circulation
- Can be mixed with tap water up to a water hardness of < 15 °dH (chloride and sulfate content < 100 mg/l)
- Compatible with sealing materials (elastomers) used in the automotive industry
- Does not adversely affect oil separation
- Various container sizes available: PE canisters, PE drums, IBCs, or delivery by tanker truck
- No emulsion formation
- Environmentally friendly, not a hazardous material, not a hazardous substance
- Easy determination of product concentration using a refractometer, Brix scale, or the coracon® test kit
- For optimal operational reliability and cost savings, we offer the above-mentioned product as a ready-mix
Specifications
- Silicate-free, nitrite-free, phosphate-free, secondary amine-free, borate-free, zinc-free, free of 2-ethylhexanoic acid (2EHs), mineral oil-free
- OAT-based corrosion inhibitor (Organic Acid Type)
- Biodegradable
- Specific gravity: 1.108 ± 0.005 g/ml (DIN 51757)
- pH-stabilizing properties
- pH 7.88 ± 0.25 (ASTM-D 1287)
- pH (1:1 with neutral water): 8.02 ± 0.25
- Electrical conductivity in µS/cm: 328 ± 30
- Electrical conductivity (1:1 with neutral water) in µS/cm: 838 ± 30
- Flash point (°C): > 100 (ASTM-D 51758)
- Can be used in combination with all chemical-free coracon® water filters
- Not a hazardous material (Water Hazard Class 1)
- Not a hazardous substance
Engine manufacturer approvals:
- Jenbacher TA 1000-0200 (Ready-Mix)
- CAT Caterpillar TR 2091/18
- MWM 2091/18
- HATZ Diesel
1. What is the composition of an engine coolant with antifreeze for large engines?
An engine coolant - also commonly referred to as coolant or antifreeze - consists of additives (inhibitors), an antifreeze agent (such as monoethylene glycol or propylene glycol), and water.
2. What are additives and inhibitors, and what is their function?
These are chemical stabilizers and inhibitors that, for example, maintain the pH level within a specified range and physically inhibit corrosion of metallic materials.
3. Why is antifreeze important in engine coolants for large engines?
Antifreeze prevents the coolant from freezing at low temperatures, which can lead to serious damage such as cracks in the engine block. In large engines, which often operate under extreme conditions, this protection is particularly important. Antifreeze agents such as glycols raise the boiling point and protect against cavitation.
4. What antifreeze agents are used in engine coolants for large engines?
The following are commonly used:
- Monoethylene glycol, also known as MEG, inexpensive, very efficient, but unfortunately classified as toxic
- Propylene glycol, also known as MPG, slightly more expensive, slightly less efficient, but non-toxic
- High-boiling glycols, slightly more expensive, slightly less efficient, but temperature-stable where other glycols are subject to thermal decomposition (glycol cracking)
5. How often should the antifreeze coolant be changed in large engines?
This depends on the type of coolant and the operating conditions. It is generally recommended to change the coolant every 2–5 years or according to the manufacturer’s specific guidelines. Our coolant analyses provide a good way to determine the condition of the fluid and approximately how long it can be used.
6. What are the consequences if the antifreeze-containing coolant is not changed regularly?
Old or degraded coolants can lose their effectiveness, which can lead to overheating, freeze damage, and corrosion. This can significantly impair the engine’s service life and performance. It can also result in unexpected breakdowns and associated repairs.
7. How do I check the antifreeze concentration in the coolant of my large engine?
Using, for example, a refractometer equipped with a MEG glycol scale. The coolant, freshly removed from the engine, should be allowed to cool to room temperature before being measured.
8. Kann ich normales Kühlmittel für PKWs in Großmotoren verwenden?
No, heavy-duty engines require special coolants tailored to their specific needs and operating conditions. Use a coolant approved for your engine, e.g., coracon® BF 6
Engine manufacturer approvals:
- Jenbacher TA 1000-0200
- MWM 2091/15
- CAT Caterpillar TR0199-99-12091/11
9. What signs indicate that the antifreeze-containing coolant needs to be replaced?
Measure the pH value regularly; if it falls below 7.5, this is a negative indicator. Does the coolant contain rust particles or magnetite? Is it cloudy, discolored, or does it have an unpleasant, acrid odor? Does the engine go into fault mode due to overheating? This is an indication of depleted coolant.
10. How important is the correct mixture of water and antifreeze in coolants for heavy-duty engines?
Very important! More isn’t always better and can result in the engine not being cooled optimally, preventing it from performing at its best. Choose an antifreeze suitable for your region. It should cover the lowest expected temperature. If necessary, follow the engine manufacturer’s specifications.
11. What are the best practices for a clean and efficient cooling circuit in large engines?
With the coracon® coolant filter, you have a hot water filter that, in bypass mode, keeps the coolant free of suspended solids and sludge such as rust, magnetite, and lime. This cost-effectively extends coolant service life and, consequently, engine lifespan. System components such as pumps, valves, sensors, heat exchangers, etc., remain clean and functional.
As a rule, operating with a coracon® coolant filter is always more cost-effective and environmentally friendly than the subsequent cleaning with acids, alkalis, and large amounts of water that would otherwise be necessary!
- Suitable for use in high-temperature systems or for cooling systems with exhaust gas heat exchangers in the engine cooling circuit where standard monoethylene glycol-based coolants are subject to thermal-oxidative coolant aging
- Ready-to-use and environmentally friendly radiator antifreeze; not a hazardous material, not a hazardous substance
- Minimum freeze protection of -20 °C or -24 °C
- The inhibitors guarantee perfect long-term corrosion protection even at high coolant temperatures
- Corrosion protection based on OAT technology for all metal alloys, including aluminum
- Excellent compatibility with elastomers (gaskets)
- The water content meets the properties specified by MWM according to TR 0199-99-2091/9
- Silicate-free ready-to-use radiator antifreeze mixture for use in engines
- Thermally stable over the long term
- Excellent cavitation protection properties
- Good heat dissipation
- High boiling point to prevent overheating
- Contains defoamers that ensure uniform coolant circulation
- Compatible with the sealing materials (elastomers) used in the automotive industry
- Various container sizes are available: PE canisters, PE drums, IBCs, or delivery by tanker truck
Specifications
- Silicate-free, nitrite-free, phosphate-free, secondary amine-free, borate-free, zinc-free, 2-ethylhexanoic acid-free, mineral oil-free
- OAT-based corrosion inhibitor (Organic Acid Type)
- Dosage: 100%
- Temperature resistance in continuous operation: approx. 235 °C
- Antifreeze component: high-quality glycols
- Color: clear, amber
- Minimum freeze protection: -20 °C or -24 °C
- Electrical conductivity: approx. 450–520 µS/cm or approx. 370 µS/cm
- Specific gravity: 1.03 g/ml (DIN 51757)
- pH value: 8.1–8.6 (ASTM-D 1287)
- Viscosity at 20 °C: 15.0 mm²/s
- Boiling point (°C): > 102 (ASTM-D 1120)
- Flash point (°C): > 100 (ASTM-D 51758)
- Reserve alkalinity: approx. 9.6
- Refractive index RI: 1.4009
- Not a hazardous material, water hazard class 1, biodegradable
1. What is a high-temperature coolant?
High-temperature coolants are not based on commonly used monoethylene glycol or propylene glycol. As a manufacturer, we have been using a more temperature-stable glycol for many years; this remains stable even at higher temperatures of up to +40°C compared to classic coolants based on monoethylene glycol.
2. When should I use a high-temperature coolant?
Whenever a traditional monoethylene glycol-based coolant is subject to rapid thermal decomposition (glycol cracking). If the engine frequently breaks down as a result and changing the coolant does not resolve the issue.
3. When is my coolant thermally decomposed?
If the pH value drops below 7.5, usually down to pH 1 or 2. If the coolant is dark brown or even black. If the coolant has an unpleasant, acrid odor and there are visible, tarry, soft deposits (non-magnetic). These are clear indications of thermally decomposed or cracked glycol (glycol cracking).
4. Glycol is an alcohol, but alcohol can’t crack! Is that true?
No, glycol and alcohol (ethanol) are different substances. Ethanol is a simple alcohol, while glycol is a group of compounds containing two diols. Ethanol is mainly used as an alcohol in beverages, disinfectants, and as a fuel additive, for example, while glycol is primarily used as an antifreeze or de-icing agent. Unlike alcohol, glycol does not evaporate. Alcohol evaporates and is highly flammable!
5. Why is the coolant in my engine cracking?
When the cooling system is not functioning optimally, due to so-called “hot spots” in the engine. These hot spots occur due to design and can be found in the turbocharger cooling system, exhaust heat exchanger, cylinder heads, cylinder liners, insufficient flow rates, excessive antifreeze concentration, too low operating pressure, and the preheating unit. The glycol literally burns, releasing a tarry substance that clogs the cooling circuit and its components. This, in turn, leads to further overheating in those areas and ultimately to engine failure.
6. My coolant cannot withstand the engine’s high thermal loads. What can I do?
We recommend switching to a high-temperature coolant such as coracon® BF 6 HT. Before doing so, it is essential to clean the engine cooling system of the tar-like deposits resulting from the cracking process. For this purpose, we recommend our special cleaner, coracon® SOL C. We would be happy to advise you!
