"dots" in coolant
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Cargo Master
Joined: Oct 2018
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From: unfortunately Germany
"dots" in coolant
I drained the coolant because I install another radiator (IPR). The coolant was renewed one year ago. IPR-inline filter is installed .
I noticed small white "dots" on the coolant surface. You can only see them if you look very closely, they are floating on the surface. So it would have to be something like oil or fuel? What could it be?
I noticed small white "dots" on the coolant surface. You can only see them if you look very closely, they are floating on the surface. So it would have to be something like oil or fuel? What could it be?
Postmaster
Joined: Sep 2016
Posts: 3,941
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From: Texas
Hard to say but don’t rule out transmission fluid (also oil) that could leach into the coolant if the radiator was compromised. I see them but hard to really say what it is. I would think oil would be brown. My fuel in coolant was also dark. Transmission fluid is usually red like your coolant. Let it sit and see if it phase separates.
Fleet Owner
Joined: Nov 2003
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Coolants have minerals in them, such as Potassium and Calcium (so does tap water if that was used for dilution), etc. The white specs could be these minerals that have precipitated out at hot areas and are now "flaking" off.
Cargo Master
Joined: Nov 2015
Posts: 3,422
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From: Fort Worth, TX
A bit of a tangent, but I found this yesterday while researching for the proper coolant to use in our Audi:
In 2013, VW introduced the G13 specification for antifreeze and coolant. How is it different from its predecessors G11, G12, G12+ and G12++? The G13 has a purple/violet colour and has the same exceptional cooling and antifreeze performance as G12++. The main difference: it is manufactured using glycerin instead of glycol. Glycerin is much less harmful to the environment than glycol. One is a bi-product of biodiesel production, the other is produced from mineral oil.It is estimated that the manufacturing of G13 produces 11% lower CO2 emissions than antifreeze with glycol.
Next to protection against freezing, the G13 is also excellent for cooling and protection against corrosion and chalk deposits.
In 2013, VW introduced the G13 specification for antifreeze and coolant. How is it different from its predecessors G11, G12, G12+ and G12++? The G13 has a purple/violet colour and has the same exceptional cooling and antifreeze performance as G12++. The main difference: it is manufactured using glycerin instead of glycol. Glycerin is much less harmful to the environment than glycol. One is a bi-product of biodiesel production, the other is produced from mineral oil.It is estimated that the manufacturing of G13 produces 11% lower CO2 emissions than antifreeze with glycol.
Next to protection against freezing, the G13 is also excellent for cooling and protection against corrosion and chalk deposits.
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Cargo Master
Joined: Oct 2018
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From: unfortunately Germany
It is a K40 antifreeze (manufacturer is Kompressol).i get neither Rotella nor CAT here in Germany.
It doesn't matter, as long as there is no diesel in the coolant :-)
It doesn't matter, as long as there is no diesel in the coolant :-)
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Cargo Master
Joined: Oct 2018
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From: unfortunately Germany
The CAT ELC is much too expensive and hard to get here. Therefore I use the K40 and renew it every 1-2 years
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Mountain Pass
Joined: Dec 2004
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I would expect oil products to form a sheen, not discrete drops. contamination by fuel or trans oil would be way down my list of suspects. What about the filter? cut it open and see what is inside. Question what is not water soluble and not oil?
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Cargo Master
Joined: Oct 2018
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From: unfortunately Germany
I had installed a bypass filter last year, it was very dirty at the beginning of the cleaning process.
After that I installed an inlinefilter to wash out, I cleaned it every 1000mls, since half a year I could not detect any dirt.
But I will open it these days and check it.
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Cargo Master
Joined: Oct 2018
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From: unfortunately Germany
Hi Mark. I'll have to ask, I'll report, thank you.
