Evans NPG+ Coolant Conversion Instructions
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Evans NPG+ Coolant Conversion Instructions
This write up is for my 02 Honda 954. Adjust acordingly for your model of bike. I did this mod this weekend, it took two days.
Evans NPG+ is non-aqueous, meaning it doesn't like water. It is also incompatible with ordinary coolants. To convert your blade to NPG+, you need to get rid of all the moisture in your cooling system, as well as all traces of incompatible coolant, thus avoiding contamination.
The way to do this is to flush your cooling ystem as if doing a normal coolant change:
1) Remove the air duct covers and both fairing side panels,
2) Remove the pressure cap from the top of the radiator.
3) Drain the coolant by unscrewing the drain plug located on the water pump (see attached picture)
4) Unscrew the cylinder drain plug and drain the coolant from the cylinder jacket. (see picture)
5) Remove and drain both of the main radiator hoses. These are the two large hoses attached to both sides of the radiator.
6) Drain the coolant reservoir overflow bottle by detaching the hose from the filler neck of the radiator and lowering it into the drain pan.
Once the system is thoroughly drained, there will still be some residual incompatible coolant and water. Here, you need to use an intermediate product that will absorb moisture and is compatiable with Evans NPG+: Sierra Coolant or Prestone LowTox Coolant. These coolants are "pet friendly" nonpoisonous coolants you can find almost anywhere. Since they are made with Propylene Glycol (like Evans), but are aqueous like Ethylene Glycol (ordinary coolant), either is the perfect thing to do the job. This will absorb any residual moisture and cleanse the system, but any residual Sierra or Prestone LowTox will not contaminate the Evans Product. After flushing the system as explained above, fill with straight "pet friendly" coolant (no water), burp the system, and bring it up to full operating temperature.
Allow the bike to cool over night and then repeat steps 1-6 listed above and refill with Evans NPG+. Don't forget to add some to the overflow reservoir filling it to normal levels. Evans exapands a bit more then ordinary coolant when hot.
The procedure might sound complicated, but it's easier then it seems and it well worth doing. It will also be the last time you need to flush and refill your cooling system as normal preventative maintenance. In the future, if you need to drain the cooling system for any reason, just capture the NPG+ in a clean container and refill when you're done.
To convert your cooling system to zero pressure, just remove the rubber seal on the inside of your radiator cap. I recomend not doing this untill you are sure that all air bubbles are out of your cooling system. I am giving mine a week before I make this change.
Evans has a boiling point of 370 degrees at 0 PSI compaired to a 50/50 water/coolant boiling point of 264 degrees at 15 psi.
Evans also has a projected life span of 500,000 miles, thus making it a lifetime coolant for your bike.
I will include pictures in following posts.
Here is the test vehical.
[IMG]local://upfiles/10994/71BE8D8D3E5041939206BD0F008BC38E.jpg[/IMG]
Evans NPG+ is non-aqueous, meaning it doesn't like water. It is also incompatible with ordinary coolants. To convert your blade to NPG+, you need to get rid of all the moisture in your cooling system, as well as all traces of incompatible coolant, thus avoiding contamination.
The way to do this is to flush your cooling ystem as if doing a normal coolant change:
1) Remove the air duct covers and both fairing side panels,
2) Remove the pressure cap from the top of the radiator.
3) Drain the coolant by unscrewing the drain plug located on the water pump (see attached picture)
4) Unscrew the cylinder drain plug and drain the coolant from the cylinder jacket. (see picture)
5) Remove and drain both of the main radiator hoses. These are the two large hoses attached to both sides of the radiator.
6) Drain the coolant reservoir overflow bottle by detaching the hose from the filler neck of the radiator and lowering it into the drain pan.
Once the system is thoroughly drained, there will still be some residual incompatible coolant and water. Here, you need to use an intermediate product that will absorb moisture and is compatiable with Evans NPG+: Sierra Coolant or Prestone LowTox Coolant. These coolants are "pet friendly" nonpoisonous coolants you can find almost anywhere. Since they are made with Propylene Glycol (like Evans), but are aqueous like Ethylene Glycol (ordinary coolant), either is the perfect thing to do the job. This will absorb any residual moisture and cleanse the system, but any residual Sierra or Prestone LowTox will not contaminate the Evans Product. After flushing the system as explained above, fill with straight "pet friendly" coolant (no water), burp the system, and bring it up to full operating temperature.
Allow the bike to cool over night and then repeat steps 1-6 listed above and refill with Evans NPG+. Don't forget to add some to the overflow reservoir filling it to normal levels. Evans exapands a bit more then ordinary coolant when hot.
The procedure might sound complicated, but it's easier then it seems and it well worth doing. It will also be the last time you need to flush and refill your cooling system as normal preventative maintenance. In the future, if you need to drain the cooling system for any reason, just capture the NPG+ in a clean container and refill when you're done.
To convert your cooling system to zero pressure, just remove the rubber seal on the inside of your radiator cap. I recomend not doing this untill you are sure that all air bubbles are out of your cooling system. I am giving mine a week before I make this change.
Evans has a boiling point of 370 degrees at 0 PSI compaired to a 50/50 water/coolant boiling point of 264 degrees at 15 psi.
Evans also has a projected life span of 500,000 miles, thus making it a lifetime coolant for your bike.
I will include pictures in following posts.
Here is the test vehical.
[IMG]local://upfiles/10994/71BE8D8D3E5041939206BD0F008BC38E.jpg[/IMG]
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