condorflysu
New member
2 stroke Ultra light aircraft motor. Next time I need to change my coolant, I'm using http://www.evanscooling.com/ it's the Rotax recommended coolant for the 4stroke Rotax 914T..
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Possible fix on engine heating for us southern folks (good info)
- Thread starter Warlock
- Start date
AbNormy
Active member
hydrometer
does anyone still use hydrometers to check the specific gravity of coolant? isn't that the antifreeze concentration? trying to remember last time I used one, always just changed it every 2 years on my cars, this is my first water cooled bike. but seems like it'd make sense to see where it's at and adjust with distilled water? just sayin...
does anyone still use hydrometers to check the specific gravity of coolant? isn't that the antifreeze concentration? trying to remember last time I used one, always just changed it every 2 years on my cars, this is my first water cooled bike. but seems like it'd make sense to see where it's at and adjust with distilled water? just sayin...
jcthorne
Well-known member
The increase in boiling point of ethylene glycol / water mix over water / water wetter is insignificant compared to the boiling point increase caused by the pressure cap raising the system pressure. IE the boiling point increase from the coolant mix is only 5 to 6 deg compared to 40 and more from the pressure. The increase in cooling system capacity of water vs a glycol water mix is significantly higher than the small change in boiling point. If your engine runs anywhere near the 258 deg boiling point that the pressure cap provides, you are WAY too hot and have issues the coolant mix cannot solve. Bottom line is that the use of water wetter and distilled water will increase your cooling system capacity and provide great corrosion protection at the loss of freeze protection. In Houston, that is an easy choice with the toys staying inside a heated garage on those few days the temps are below freezing. For others, its your choice. But the coolant change is very effective. Water wetter added to an EG coolant mix does not offer all that much improvement, most of the coolant capacity increase is from the distilled water with no EG in the way.
jcthorne
Well-known member
The evans coolant is an excellent product in the right application. It provides a boiling point far greater than a distilled water based coolant. BUT it also has a much lower heat capacity per unit volume. IE the same volume of coolant moved transfers less heat so while the boiling point is raised, the temps the engine will operate at are higher as well to overcome the loss of capacity. All else being equal. The evans works very well in diesel engines for example and can work well in small engines IF the cooling system is designed for it. As a replacement for water in cooling systems designed for water, it may not be the best choice.
Bob Ledford
New member
Coolant for Sutherners
Both web sites about wetter water and decreasing antifreeze ratiios. It makes reading sense from the authors view point and a scientific point of view. It would be worth the time and energies expended to see if it fact works as the author states it does.
There has to be a simple answer because not all of the 2013's are experiencing the running hot that we know about or of.
Both web sites about wetter water and decreasing antifreeze ratiios. It makes reading sense from the authors view point and a scientific point of view. It would be worth the time and energies expended to see if it fact works as the author states it does.
There has to be a simple answer because not all of the 2013's are experiencing the running hot that we know about or of.
MouthPiece
Banged Up Member
I don't mind my spyder running hot. It's the blow torch effect that I get on my right foot when my foot is forward and next to the "lower black hole of heat". I have found that this heat is most noticeable when the fan comes on. When the fan is not on, then I don't experience the heat at all.
My thoughts are that if this coolant ratio remedy can cause my fan NOT to come on so often, then I my issue is fixed. I've been used to seeing my temp gauge run hot. It seemingly has never effected my spyder (that I'm aware of). My main concern has simply been that blast of heat when the fan comes on.
I plan on asking my dealer to change the ration when I take my spyder in next week for my 14,000 mile oil change, service maintenance work and the "heat kit" installation.
I'll report what I find when all this is done.
Chris
My thoughts are that if this coolant ratio remedy can cause my fan NOT to come on so often, then I my issue is fixed. I've been used to seeing my temp gauge run hot. It seemingly has never effected my spyder (that I'm aware of). My main concern has simply been that blast of heat when the fan comes on.
I plan on asking my dealer to change the ration when I take my spyder in next week for my 14,000 mile oil change, service maintenance work and the "heat kit" installation.
I'll report what I find when all this is done.
Chris
Warlock
New member
I just added a fan can to my wife's RT and man did it make a difference. But still has the heat from the converter.
David
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