Show whole topic
Feb 20, 2018 12:00 pm
Feb 20, 2018 12:00 pm
Subject: Re: Waterless Coolant
Regarding Fernox DS3. I long understood this to be the "choice" product for cleaning the cooling systems of elderly cars. I bought some, and found the instructions somewhat vague as to dilution proportions. So I rang their technical department.
Just as well I did. They stated that they now recommend DS40 very strongly, in preference to DS3, for use in "our" cars. In particular, it seems that DS3 is particularly aggressive with aluminium. Furthermore, DS3 is solely a descalant attacking limescale only, whereas DS40 is a cleaner that will remove rust as well as limescale.
I have therefore since bought a tub of DS40. However, at the time, I was on the verge of getting the LG6 back on the road, and postal delay to me in France could not be countenanced, so I did use the DS3, but at a weaker dilution, and for less time in the cooling system than originally planned. It did clear out a lot but a particular memory was how long it took to entirely flush it from the system, judged by the colour of the water. I could see no noticeable deterioration to the aluminium head water outlet.
Hope this helps
Laurence
Regarding Fernox DS3. I long understood this to be the "choice" product for cleaning the cooling systems of elderly cars. I bought some, and found the instructions somewhat vague as to dilution proportions. So I rang their technical department.
Just as well I did. They stated that they now recommend DS40 very strongly, in preference to DS3, for use in "our" cars. In particular, it seems that DS3 is particularly aggressive with aluminium. Furthermore, DS3 is solely a descalant attacking limescale only, whereas DS40 is a cleaner that will remove rust as well as limescale.
I have therefore since bought a tub of DS40. However, at the time, I was on the verge of getting the LG6 back on the road, and postal delay to me in France could not be countenanced, so I did use the DS3, but at a weaker dilution, and for less time in the cooling system than originally planned. It did clear out a lot but a particular memory was how long it took to entirely flush it from the system, judged by the colour of the water. I could see no noticeable deterioration to the aluminium head water outlet.
Hope this helps
Laurence