Frequently Asked Questions

Evans Waterless Coolants are available through dealers and distributors across the US, and internationally. For a complete list, please visit our website at www.evanscooling.ph

Evans is the only manufacturer o waterless engine coolant. All other commercially available automotive coolants are water-based, or meant to be diluted with water. All Evans coolants are waterless.

That would depend on the applications, and to clarify, we’ve listed each product below and the applicable uses for each.

• High Performance Coolant: For cars, and light duty trucks. Also for use in boats, light aircraft, light duty diesels, LP and CNG engines.
• Heavy Duty Coolant: For all heavy duty applications such as class 8 trucks, generators, and off highway equipment.
• Powersports Coolant: For use in motorcycles, ATV’s, Snowmobiles, and other off-road powersports applications.
• Arctic Coolant: For extreme cold weather applications for any of the above applications.
• NPG: For racing venues that allow propylene glycol based coolants, but not ethylene glycol based coolants. Not applicable for general use. Adaptive equipment may be needed for specific high performance applications. Call Evans Cooling Systems for further specifics regarding use of NPG.
• Prep Fluid: Used as a waterless flush to remove remaining water-based coolant from the cooling system prior to installing EWC. Prep fluid is 100% compatible with all Evans Waterless Coolants.

Some vehicle manufacturers may not yet recommend or endorse the use of EWC. However, you are protected by the Magnuson-Moss Warranty Act¹. Evans Cooling Systems provides its own warranty which covers any damages which occur as a result of using the coolant. Contact Evans for further information.
¹ http://www.consumer.ftc.gov/articles/0138-auto-warranties-routine-maintenance

The coverage is in effect for as long as the coolant is in the vehicle, provided that the Evans installation instructions have been followed, the water content of the coolant is maintained at less than 3%, and no other materials are added to the coolant.

The flash point (definition: the lowest temperature at which a combustible substance produces sufficient vapor near its surface to generate an ignitable mixture with air) of EWC is similar to that of conventional water-based coolant, i.e., 248 °F/120 °C.

EWC is hydroscopic, which means it has the ability to absorb moisture. As such, containers of unused coolant should be kept tightly closed. In the cooling system, EWC should not absorb a significant amount of moisture from the atmosphere as long as a conventional pressure cap is used. Under normal circumstances, the cap should not open, allowing air to enter the system.

It is important to do a through job in removing all the old coolant before installing EWC. Complete Installation Instructions are available on the website, and also in a downloadable pdf. In addition, you may view the installation video on the website as a supplemental aid to installing EWC.

Evans recommends using Prep Fluid for all installations to ensure removal of all remaining water-based coolant from the cooling system before installing EWC. In anew or “dry” engine, it is not necessary to use Prep Fluid.

There are two methods to determine water content after installation of EWC.
Using a Conversion Kit – The kit is an essential tool for converting over from a water-based Coolant to Evans Waterless Coolant. The kit contains water content test strips that measure the final water content after the waterless coolant conversion is completed. The kit is typically sold to your do-it yourserlfers.
Using a refractometer – A refractometer is a device used to measure the final water content after conversion to EWC and uses a Brix scale. The refractometers are most commonly used by fleets or conversion facilities where installations are regularly performed. Instructions for use are included in the installation instructions.

It is important to closely follow directions during the initial EWC installation. A water content higher that 3% will lower the boiling point, and may reduce the corrosion and pump cavitation protection of EWC. If a water test shows there is between 3 and 5% water in the coolant, the corrective action is to drain half of the system volume and add back new EWC. This will reduce the water content to an acceptable range. If the measured water content is greater than 5%, the system must be drained and refilled with new EWC.

A different radiator/pressure cap is not required with EWC. A water-based coolant generally requires anywhere from a 7 to 15 psig pressure cap. Higher pressure raises the boiling point of water-based coolant. EWC expands slightly as it warms creating pressure of 3-5 psig, and the existing cap does not need to be changed.

No periodic addition of supplemental coolant additives are required, nor should any ever be added. Evans recommends inspecting the cooling system at least once a year to ensure that no contamination of the coolant has occurred.

With EWC, the likelihood of coolant loss and the need for topping up are greatly reduced. In the event that there is significant coolant loss from the system during operation and no EWC. The high boiling point and corrosion protection of EWC will be reduced, and the coolant should be replaced as soon as possible.

Water-based coolant boils at a temperature only slightly higher than the operating temperature of the coolant. The boiling point of water-based coolant is somewhat above the boiling point of water for the pressure of the system. Localized boiling releases water vapor that can only condense into coolant that is colder than the boiling point of water. Any vapor that doesn’t condense occupies a volume that displaces liquid coolant. Water vapor is a very poor conductor of heat. Hot engine metal, insulate between hot metal and the liquid coolant. Liquid coolant is in contact with all of the coolant jacket at all times, providing a path of excellent heat transfer away from the hot metal.

The effect of EWC on cooling system temperatures will depend on the engine and cooling system configuration, as well as driving conditions. Vehicles running under normal operating conditions, should show no change or a slight increase in temperature. In high horsepower applications, the temperature effect of running EWC will depend on the engine and cooling system components.

In the short term, there should be no concern about the performance of mixing a small amount of conventional coolant or straight water with EWC. The high boiling point and corrosion protection of EWC will be reduced, and the coolant should be replaced as soon as possible.