Making the Upgrade to Evans Waterless Coolant
Posted on by Mike Tourville
Ready to improve your engine’s performance and prevent corrosion and boilover? Converting your vehicle to Evans Waterless Coolant eliminates many of the problems associated with traditional 50% water antifreezes. The conversion process is straightforward and can be accomplished by anyone with the right tools and some basic experience in engine mechanics. When you’re ready to complete the changeover, follow this guide. Before You Start Make sure you have all the tools and supplies you’ll need for the conversion before you get started. You’ll need:
- Enough of the Evans coolant appropriate for your vehicle to fill the radiator. (See your owner’s manual for cooling system capacity. If you do not know which type of Evans coolant to use, see our FAQ.)
- Evans Prep Fluid, which you will use to purge any remaining water-based antifreeze from the system after initial drain. Buy now.
- A high-volume/low-pressure air source such as a Makita UB1103 variable speed hand-held blower or an on-off blowers by Metro Vacuum.
- Brix scale handheld refractometer to testing the water content of the installed Evans waterless coolant after conversion. Buy now.
Draining the System
- Allow system to cool completely before beginning, then remove the pressure cap.
- Open all drain valves and plugs. Open bleeder or petcock vents if there are any.
- Drain all parts of the system, including radiator, coolant reservoir, engine block, and heater.
- Ensure that the heater control valve is open, then use high-volume/low-pressure air to gently blow out all parts of the system, including the overflow bottle and pressurized expansion tank if applicable. If accessible, blow out the heater circuit, and remove the thermostat to enable you to blow air through the head and block and out the bottom radiator hose or radiator drain.
Purging the System
- Close all drain valves, plugs and vents, and reconnect circuits.
- Fill the system with Prep Fluid.
- Replace the pressure cap and run the engine with the heater on, at full hot, for 10 minutes after reaching operating temperature (thermostat open).
- Repeat the instructions for draining the system to drain out the used Prep Fluid.
Refilling the System
- Close all drain valves, plugs and vents, and reconnect all circuits.
- Fill system completely with the appropriate Evans waterless coolant and start the engine. Add coolant as needed to keep system full.
- Replace the pressure cap and run engine with the heater on, at full hot, for 10-15 minutes after reaching operating temperature.
- Shut the engine off and allow the system to cool.
Testing the Coolant
- Draw a sample of room-temperature coolant from the radiator. Check the water content using a refractometer according to directions.
- The refractometer should show that the water content of the coolant is below 3%. If the water content is over 3%, run the system again to operating temperature, and allow sufficient time for the thermostat to open and fluid to circulate through the radiator. Repeat sampling and water content test.
- If the water content is 3% or less, the equipment is ready for use. Make sure overflow bottle or expansion tank is filled to the “cold” mark with Evans waterless coolant.
- Place Evans warning stickers in strategic locations (radiator cap, radiator shroud, overflow bottle, expansion tank) to warn against adding water or water-based coolant to the system.
- Collect used coolant and Prep Fluid and dispose of in accordance with federal, state, and local environmental regulations.
- After the system has cooled down and for a few days thereafter, add small amounts of coolant as necessary to fill the system up to the cold line when the engine is cold.
- Never mix Evans coolant with any other coolant. In case of a loss of coolant when no Evans coolant is available, you may use water or traditional coolant to fill the system until repairs can be made. The system should be drained, purged and re-filled with new waterless coolant as soon as possible.