Physics and thermodynamics being what they are, I can’t see an Evans engine running cooler than a water based coolant - assuming no boil over for the water based system. There are a lot of factors that could come into play to explain why one bike might run hotter or cooler than another, but if you want to reduce it to the effect of just the coolant choice then I suspect that the only time Evans could be said to run cooler than say, Maxima coolant or Engine Ice, would be in a boil over situation with the water based stuff. I was wondering about the difference with NPG+. )ĭon't bother taking exception to any of the above. Not that you have to (read above) but if you have NO water in the system, then you don't have to wonder if what you DO have is 5% or more, 'eh?īTW.for those of you with diesel bikes.the amount of aqueous coolant you can retain drops to 3% capacity by volume. Hooking up a shop vac may well work fine, but the prep product will absolutely remove every drop. Note: Motorcycle coolant systems are notorious for being hard to drain (completely). Most engine systems (pre npg) run in the 12-15psi range. The pressure an NPG cooled system generates is much less than an aqueous system because of the elimination of vaporization. The NPG product expands 'similarly' to aqueous coolants. Drain your engine, refill with the 'prep' product. Still, the more removed is better.and they make a hygroscopic 'prep' product that will do this. So, it is not necessary to remove 100% or every drip. They want the water left in the system to be less than 5% of the total volume. I just got off the phone with tech support at evans. I thought that 'cuz such has been posted before. I thought it expanded much less when heated. Re:'- the Evans coolant expands much more than does water when heated.' Once it's installed, you'll never overheat again ! ! ! IMO, the expansion tank located right behind the rad blocks a large amount of air flow - so I relocated mine behind the headlight.
There's also a good reason to keep the expansion tank on there - the Evans coolant expands much more than does water when heated and at $35 a gal you don't want to waste any. When hot, I drained it then hooked up the shop vac to the rad inlet and sucked air through the system for about 1/2 hr. I flushed my cooling system twice, then ran it up to temp with just plain water. You did the best thing -took it all apart, but there could still be some fluid remaining in the water pum,p.
#Evans coolant prius install#
So, to effectively install the Evans coolant you must remove ALL of the water from your system. Add just a trace of water and your boiling point comes back down to the 235 range. Mix it with antifreeze and the boiling point of the mix goes up just a little -maybe to 235 or 245F. Water -distilled or other boils at a little over 200deg.
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