WHAT IS IT? Evans Waterless Powersports coolant is
a waterless antifreeze/coolant that is glycol-only-based
instead of glycol and water. It can be used as a direct
replacement for traditional antifreeze/coolant with some
WHAT’S IT COST? $28.95 (half gallon).
CONTACT? www.evanscoolant.com or (888) 990-2665.
WHAT STANDS OUT? Here’s a list of things that stand
out with Evans Waterless Powersports coolant.
(1) Boiling point. Water boils at 212 degrees Fahrenheit.
In a motorcycle’s radiator, for each pound you raise the
system’s blow-off pressure, you raise the boiling point 3
degrees. With the typical 1.1 kg/cm2 radiator cap found
on all Japanese-built motocross bikes, the boiling point
of water is raised to 227 degrees. Adding a conventional
ethylene glycol and water antifreeze to the system raises
the boiling point to 265 degrees. If that is not enough boilover protection, you can replace the 1.1 kg/cm2 radiator
cap with a 1.8 kg/cm2 (stock on Husqvarnas and KTMs)
and up the ante to 278 degrees. Still not enough? Evans
Waterless Powersports coolant has a boiling point of 375
( 2) Pluses. Why would you want to raise your cooling
system’s boiling point to 375 degrees? Because coolant
only works as long as it stays in a liquid state. Once it
begins to boil, it turns to steam. Steam has zero ability to
transfer heat from the engine’s metal components. Steam
forms at the hot spots of the engine (i.e., combustion
chamber, cylinder liner and exhaust port), and keeping
temperatures under control at these hot spots is crucial to
engine performance. When a pocket of steam forms, the
coolant no longer wicks excessive heat away from that
area. Steam also raises the pressure in the cooling system
enough to blow open the radiator cap and start spewing
the dreaded trail of white mist behind you. And, as you
may remember from school, a pound of steam is made up
of a pound of water.
( 3) Minuses. First, if your engine’s water gets up to
375 degrees, there is something wrong with your system,
although it is nice to have the failsafe of such a high boiling point. Second, to use a waterless glycol-based coolant,
you must completely purge your engine of left-over antifreeze. This means every drop. If you leave more than 3
percent of the old antifreeze in the system, you will lose
the corrosion-resistant properties of the Evans coolant.
Third, Evans Waterless coolant is hygroscopic, which
means that it absorbs moisture from the air if not kept in
a sealed container. Fourth, it is fatal if swallowed. So, don’t
drink it, but even a small puddle under your bike can kill
your dog if he licks it. Evans adds a bitterant to deter dogs
from tasting it. Fifth, not only will a spill kill small animals,
but it is four times slipperier than water, which poses a
slip-and-fall danger. Sixth, it is expensive. A 1/2 gallon is
almost twice the price of a 1/2 gallon of Maxima Coolanol.
Seventh, since Evans Waterless coolant boils at a much
higher point, engine temperatures—not to be confused
with water temperatures—are also raised.
( 4) Performance. MXA ran Evans Waterless coolant
in our 2017 KTM 350SXF. We had no issues. We did push
a little coolant out the first time we ran the bike, but that
was because the fluid expands by 7 percent when warm.
After the initial run-in, we never had to top off the system. We did, as a precaution, drain half of the fluid after
the first ride and top off the radiator to ensure that we
purged any leftover radiator fluid (theoretically, draining
and refilling cut the potential old fluid percentage by half).
We raced the bike in SoCal heat and in long motos without any issues—although, to be truthful, we had no issues
with its sister 350 that was running Maxima Coolanol at
the same races.
WHAT’S THE SQUAWK? The price (and everything
listed in “Minuses”).
This is the radiator fluid for a guy who
wears suspenders to hold up his belt. It is
an insurance policy against steam.
EVANS WATERLESS POWERSPORTS COOLANT
MXA TEAM TESTED