2002 TD6 anti freeze

guys, let me clear your doubts once and for all. As a person who is involved in the production of automotive (and not only) oils and antifreeze, I note: only the basis for which antifreeze is replaced is important. It may be :glycerin (God forbid) glycerin aggressively eats away all the metal of your engine. Especially aluminum and bronze/copper. A mixture of glycerin and ethylene glycol. Better than glycerin and not as expensive as pure monoethylene glycol. Here, choose how long and how much you are willing to invest in your car's cooling system. Monoethylene glycol is pure beauty, does not destroy metal + replacement period +/-5 years. But expensive
Color doesn't matter at all. You can paint AdBlue black or antifreeze green/orange/red. Indifferently. Please.
P S You can mix, but be careful with extreme bases. it is better to simply flush the system with water before changing the type of antifreeze.

Messerschmitt said:

guys, let me clear your doubts once and for all. As a person who is involved in the production of automotive (and not only) oils and antifreeze, I note: only the basis for which antifreeze is replaced is important. It may be :glycerin (God forbid) glycerin aggressively eats away all the metal of your engine. Especially aluminum and bronze/copper. A mixture of glycerin and ethylene glycol. Better than glycerin and not as expensive as pure monoethylene glycol. Here, choose how long and how much you are willing to invest in your car's cooling system. Monoethylene glycol is pure beauty, does not destroy metal + replacement period +/-5 years. But expensive
Color doesn't matter at all. You can paint AdBlue black or antifreeze green/orange/red. Indifferently. Please.
P S You can mix, but be careful with extreme bases. it is better to simply flush the system with water before changing the type of antifreeze.

Click to expand...

Ah that's very interesting. Do you know why on the td5 it's supposed to be very important to use the OATs antifreeze, unusually pink in colour once diluted. Thanks

Gottschalk said:

Ah that's very interesting. Do you know why on the td5 it's supposed to be very important to use the OATs antifreeze, unusually pink in colour once diluted. Thanks

Click to expand...

I'm sorry, I have some difficulties with the translation. Please write in full what OAT means, and I will ask our technology why and I will give you an answer.

Messerschmitt said:

I'm sorry, I have some difficulties with the translation. Please write in full what OAT means, and I will ask our technology why and I will give you an answer.

Click to expand...

Organic Acid Technology

Datatek said:

Технологія органічних кислот _ _ _

Click to expand...

Well, it seems that they have arrived. because even in the Soviet Union, a liquid, antifreeze, called TOSol (technology of organic synthesis, and the alcohol ending of OL) was developed. But ok, I'll ask, but probably already from Monday.

Messerschmitt said:

Well, it seems that they have arrived. because even in the Soviet Union, a liquid, antifreeze, called TOSol (technology of organic synthesis, and the alcohol ending of OL) was developed. But ok, I'll ask, but probably already from Monday.

Click to expand...

Thank you, appreciated!

Gottschalk said:

Дякую, оцінено!

Click to expand...

Well, let's be honest: the technology of organic synthesis and the technology of organic acids can turn out to be different things. Therefore, it is better to ask a specialized specialist. I will give an answer in the near future.
from Monday )again, the translation is magical. But, it seems, we understood each other, so we are waiting for the result.

I didn't wait until Monday - I wrote to the technologist this morning and this is what he wrote back to me:
the difference in antifreezes based on ethylene glycol and propylene glycol is only in anti-corrosion additives (ethylene glycol itself is corrosive), their basis and principle of action.
Silicates, phosphates, nitrites, amines, nitrates and their combinations. Silicate additives cover the entire inner surface of the cooling system with a protective anti-corrosion layer (like scale in a kettle), which provides protection against corrosion. service life, no more than 2 years, afraid of overheating - no more than 105°C, otherwise it loses its anti-corrosion properties (not suitable for high-temperature loaded engines)

Salts of carboxylic acids and small additions of silicates (usually done in Europe) or phosphates (mostly Japanese). The protective layer is formed by silicates. Term of operation - no more than three years.

Additives based on carboxylic acids. Carboxylate additives form a protective layer only in places of corrosion, which increases the heat transfer of antifreezes. Salts of organic additives form a protective layer in places where corrosion is localized. The service life of antifreeze with such additives is about five years.

There is still a new generation of modern antifreezes. They contain highly reactive packets of silicate additives. But we do not use them in production yet. They combine the advantages of hybrid and carboxylate technologies. They create dynamic and static protective layers, have exceptional thermal conductivity and heat capacity.
I thanked him for the quick answer, he asked me why this was for me. I wrote to him that we are dealing with the issue of antifreeze on the forum, then he added:
In addition to color, pay attention to the production technology, the presence of standards and tolerances of manufacturers. I emphasize the need to periodically monitor the state of antifreeze in the system. A jelly-like mass may form on the inside of the neck of the expansion tank (unscrew the cap and look inside), at an ambient temperature of minus 10-15 ° C, cloudiness, precipitation, and more frequent operation of the fan are noticeable in it. Antifreeze can change the color from the original to red. This means that corrosion is actively occurring. The fluid needs to be changed urgently, regardless of how long it has served you.
I hope that Google translator did not confuse the content. )

Very informative. Thank you.

Gottschalk said:

Ah that's very interesting. Do you know why on the td5 it's supposed to be very important to use the OATs antifreeze, unusually pink in colour once diluted. Thanks

Click to expand...

So, certain conclusions can be drawn, but for this some clarifications are needed. Is this a high-temperature engine?

Messerschmitt said:

So, certain conclusions can be drawn, but for this some clarifications are needed. Is this a high-temperature engine?

Click to expand...

Hi thanks very much for your very informative answer, very interesting indeed!
I don't think it is a particularly high temp engine, it's the one used in defender and discovery 2, I do know that if run very hot for a long time (when the engine gas been remapped for example) it can suffer warped and shuffled heads etc, and it is an alloy head so maybe that has something to do with it?

Messerschmitt said:

So, certain conclusions can be drawn, but for this some clarifications are needed. Is this a high-temperature engine?

Click to expand...

The M57 diesel in the L322 runs at 105C

Datatek said:

The M57 diesel in the L322 runs at 105C

Click to expand...

That is, almost at the limit of the temperature regime. That's why the OAT answer. Although, I will point out that in my wife's Opel Tigra (1st gen.), the normal temperature is up to 110 °C (and in the summer it is often up to 120) and the antifreeze of our production is poured, it corresponds to the G11 tolerance (ethylene glycol base, silicate additives) . So far there are no problems. will have to look)

Let me draw a line (conclusion)
Іf you don't expect to pass the car on to your great-grandchildren - it doesn't matter what antifreeze is poured into the system. Еnough for your age. This is my personal opinion and it can be harmful (!)