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Coolant

  • garfield langille
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3 days 18 hours ago #17764 by garfield langille
garfield langille created the topic: Coolant
I have searched and searched for info re coolant and can only find that for the 912 ul we

should use silicate free coolant. I cannot find it anywhere but a local rotax dealer who
handles skidoos and such has coolant called xps which is orange colored and supposed
to be good for aluminum engines. Would this coolant be what I am looking for? You
can inform me direct at garfieldmau at Hotmail com .

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3 days 17 hours ago - 3 days 17 hours ago #17765 by Rob Seaton
Rob Seaton replied the topic: Coolant
A list of approved coolants can be found in service instruction SI-912-016 rev 8.
Use only distilled or deionized water. Or buy the premixed coolant.

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Last Edit: 3 days 17 hours ago by Rob Seaton.

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  • Roger Lee
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3 days 13 hours ago - 3 days 13 hours ago #17766 by Roger Lee
Roger Lee replied the topic: Coolant
Most coolants now days are silicate free. It will tell you right on the labels. I called Prestone once many years ago and they told me they hadn't had silicates in their anti freeze since 1995 except in one diesel coolant. Dex Cool Extended Life (orange) is silicate free.

www.carid.com/articles/antifreeze-explained.html

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'Silicates are a chemical compound containing silicon, oxygen, and one or more metals, e.g., aluminum, barium, beryllium, borate, calcium, iron, magnesium, manganese, molybdate, nitrite, nitrate, phosphate, potassium, sodium, or zirconium. Silicates may be considered chemically as salts of the various silicic acids. 1 In a cooling system, silicates offer metal parts ( especially aluminum ) a high level of fast acting protection against corrosion and pitting that is vital. Silicates "charge up" a cooling system with protection that lasts about 2 years. After two years, the coolant mix needs to be replaced with new coolant and water. New every two.

Silicates offer instant protection to the cooling system. Heavy duty vehicles rely on silicates to give precise amounts of protection, and can be recharged without draining the entire coolant. Silicates do have a life, and it's a short one - two years. If left longer, build up inside the radiator begins, and the silicates actually contribute to cooling system problems. Silicate drop out occurs after the coolant has been "spent", and the inhibitors drop out of solution. Silicates are blamed for deposit build up in radiators and heaters, causing engine overheating and poor heater performance. Once the silicates drop out of solution, dissimilar metal corrosion is no longer suppressed, and metal components begin to deteriorate.

Silicates are deemed to be abrasive in a cooling system, and are blamed for premature water pump seal failure. With the average miles per year per car on the rise, it does seem to be a valid concern. "

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-574-1080 Home (TRY HOME FIRST)
520-349-7056 Cell
Last Edit: 3 days 13 hours ago by Roger Lee.

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  • garfield langille
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2 days 19 hours ago #17769 by garfield langille
garfield langille replied the topic: Coolant
Thanks Roger. I went to a business that handles skidoos and atvs with rotax engines. They had the orange
coloured coolant which says on the label that it is for aluminum engines so I bought some today,
thanks.... Gary near Ottawa Ontario

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