![]() PS Agree wrt antifreeze and pets - my brother's cat died after drinking from a puddle of antifreeze/water under his car. I also bought a refractometer to check the ratio of glycol to water in the overflow bottle, and it does seem to indicate that the mixture will gradually acquire a slightly higher glycol ratio, (ie the water does gradually reduce), but I just top up occasionally with more 50/50 mix, or even a slightly higher distilled water ratio. Hi Alf,I had also read that they then swung back to recommending the 50/50 glycol/water again.We run the 50/50 in our 80hp 912A with no problem. ![]() By the way anybody doing coolant changes be VERY careful that your pets never drinks the stuff as it is SWEET but will kill them very quickly from renal failure - My Veterinary tip for the forum one thing I found today was the difference in prices with the Evans propylene glycol waterless being so much more expensive than the 50/50 water based ethylene glycol. Hey Keith - yes I agree as new things are developed we need to look at these. As yet I have not heard of any coolants failing, organics are there too.Īs I see the subject we must do the new research as things have changed. In a nut shell the process of the coolant is to transfer the heat from the engine to the radiator which dissipates the heat hence coolants must go around and around and continue the process without failure.Even in the mining industry coolants are evolving, for good reference points look at some of coolants as they must transfer great abundance of heat to the outside world. So much so that we're thinking of putting on the oil line an optional thermostat Tecnam approves.As I see it the coolant chemistry is changing and this some of the teachings from the radiator shops. So much so that even in the summer we have to put some aluminum tape over part of either the oil radiator, coolant radiator, or both to get them to run up in optimum tempurature ranges for oil for decent part of the flight. I MIGHT be able to find out by calling the A&P guy who did that 3 years ago.Īs for the reported issue of the engines running hot because Evans doesn't have as high heat transfer capacity:Īll I can say is that in OUR case both Rotax engines I have (the old 80HP on a Skyranger, newer 100 on Tecnam), both under pretty tight cowls, (one with traditional coolant, one with Evans) both run very much on the COOL side, even when climbing with outdoor temps high. Good point about finding out if they're mixable from Evans(will go to Evans and try to find that out) because in the engine log the note on installing Evans doesn't say WHICH one is in there. Thanks for your, as usual, considered advice, Roger. ![]() Open air engines usually didn't have an issue, but tight cowl engines did. This put many up to and or over the max temp for the engine. Most have gotten away from Evans because it carries a 20F-30F temp penalty depending on the application. Unless the coolant in the system has a color you may not be able to tell which one is in there. This may be a better question about mixing either of the three directly with Evans unless it states something on their website. "Evans 1012PF Waterless Powersports Coolant" "1.Vintage Cool 180° is specially formulated for increased yellow metals and the more porous cast metal parts found in Vintage engines.Ģ.Classic Cool 180° is specially formulated for engines with more cast steel and iron, with reduced levels of copper and the introduction of aluminum products.ģ.Power Cool 180° is specially formulated for high performance engines."Īnyone know if the one for sale at Amazon is appropriate? approx $45 down to about $17.īUT I note that Evans makes three different formulations: Looks like minimal quantity I can buy is half gallon, even though I don't expect to likely need more than a cupful, if that, ever.įound quite a price range for half a gallon. (I know adding more than a tiny trace of water to Evans is a general no-no,Īnd AFAIK shouldn't add other coolants to it.) I know that Rotax isn't pushing Evans as hard as it once was, and that the other coolants are fine, but since it's in there already figure I'd keep it.īut want to have a little extra around in case I ever need to top it up. ![]() Unlike our older 912UL this one had Evans coolant put in it a couple of years ago.
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