Pink Coolant - Evans?

My coolant is pink and it's not Evans. Glycol based coolants are commonly red, pink, green and I have also seen blue and yellow.

I have no experience with Evans, however from what I have read in the past, you can not add water to Evans - it's a waterless coolant.

If you are unable to determine the type of coolant, I recomend you drain and thoroughly flush the cooling system. Then refill with a good quality glycol type. Record the type of coolant used in your maintenance log. Be sure to use a coolant that is formulated for multi metal, aluminium alloy cooling systems and mix the concentrate to pure water at 50:50 ratio.

 " ..........small coolant leak from an improperly clamped hose............"

I am always concerned when I hear of people blaming the clamp for a leaking hose. A correctly sized hose/spigot will not leak. The clamp is for security ie to prevent the hose slipping off the spigot and should only be as tight as needed to achieve this.

Thanks for the reply.  Honestly I've not looked real close at the clamp/hose.  It was nearly dark when we landed and that was my first impression only.  The hose is clearly pulled back a bit and dripping slightly from the end, so my assumption was that it's the clamp.  I'll look closer soon.

I thought maybe it's Evans based on other things I've read where I seemed to surmise that Evans was in new engines.  I was hoping to avoid draining it.

Good point about not adding water to waterless coolant. 😀 

Hi Tony

Evans is blue, not pink.  If you had Evans NEVER add water of any kind, they are not compatible.  Any Rotax engine made after 2014 have the new low volume heads.  Rotax says they are NOT compatible with Evans in that they do not flow the same as the old version heads. Pink sounds like you need to check with whoever sold you the plane so you can match the coolant correctly.  Best advice is never mix the colors,, they all have different blends internally and may not be compatible with other suppliers.

Cheers

Thank you.  Looks like I'll just be draining it.

I agree with RW. One - Evans should not be used. It is bluish in color and NEVER add water to Evans.

In the USA Dex Cool 50/50 which is extended life and orange in color and so is the cap on the bottle. I tried Evans many years ago and the temperature penalty is definitely not worth it.