frequently asked questions

Which automotive coolants are water-based?

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

Which Evans product should I use for my vehicle?

High Performance Waterless Engine Coolant: For cars, and light duty trucks. Also for use in boats, light aircraft, light duty diesels, LP and CNG engines.

Heavy Duty Waterless Engine Coolant: For all heavy duty applications such as class 8 trucks, generators, and offhighway equipment.

Waterless Powersports Coolant: For use in motorcycles, ATV’s, snowmobiles, and other off-road powersports applications.

NPG Waterless Engine Coolant: For racing venues that allow propylene glycol based coolants, but not ethylene glycol based coolants. Not 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 Evans waterless coolant. Prep fluid is 100% compatible with all Evans waterless coolants.

Will using Evans Waterless Coolant void my warranty?

Some vehicle manufacturers may not yet recommend or endorse the use of Evans waterless coolant. However, you are protected by the Magnuson-Moss Warranty Act. Evans Cooling Systems provides its own warranty, which covers any damages that occur as a result of using the coolant.

For how long is Evans waterless coolants warrantied?

Evans Cooling Systems Inc. (ECS) warrants its products to be free from material defects under normal use for a period of two years from the date of purchase.

What is the flash point of Evans coolant?

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

Over time, will Evans coolant absorb water?

Evans waterless coolant is hygroscopic, which means it has the ability to absorb moisture. As such, containers of unused coolant should be kept tightly closed. In the cooling system, Evans waterless coolant 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.

How do I install Evans waterless coolant in my vehicle?

The conversion process is not complicated but should be done thoroughly and according to written instructions. Basic Installation Procedure:

• Drain all old water-based coolant out from radiator, block, and heater core if accessible.
• Use high volume air to force out remaining coolant.
• Fill with Evans Prep Fluid (waterless flush) and run for 15 minutes to circulate.
• Allow to cool and drain out Prep Fluid in same manner as old water-based coolant.
• Fill with Evans Waterless Coolant and run for 15 minutes to circulate. Top off as necessary.
• Test for water content to confirm less than 3% water. Water content can be measured with a refractometer or a sample can be sent to Evans for testing.

Do I really need to use Prep Fluid?

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

How will I measure water content after installation of Evans waterless coolant?

A refractometer can be used to measure the final water content after conversion to Evans waterless coolant and uses a Brix scale. Refractometers are most commonly used by fleets or conversion facilities where installations are regularly performed.

What happens if I have water in my cooling systems after installing Evans coolant?

It is important to closely follow directions during the initial Evans waterless coolant installation. A water content higher than 3% will lower the boiling point, and may reduce the corrosion and pump cavitation protection of Evans waterless coolant. 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 Evans waterless coolant. 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 Evans waterless coolant.

Do I need to change my radiator cap when using Evans coolant?

A different radiator/pressure cap is not required with Evans waterless coolant. 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. Evans waterless coolant expands slightly as it warms, creating pressure of 3–5 psig, and the existing cap does not need to be changed.