Coolant top-up?

13 replies to this topic
  • boer

Posted June 15, 2006 - 01:01 AM


I need to top-up the coolant on my bike as the tank is nearly empty. Can I use any deionized battery water? :excuseme:

  • Matty05

Posted June 15, 2006 - 02:25 AM


Hey Boer!

Of course you can! It just doesn't work as well as coolant.

  • bg10459

Posted June 15, 2006 - 04:54 AM


It just doesn't work as well as coolant.

Yeah, it works better.

  • Frank_z28

Posted June 15, 2006 - 02:52 PM


if you only use water be sure to empty it before the winter. Water expend when it freeze.

  • Numskull

Posted June 15, 2006 - 04:20 PM


60 parts water to 40 parts antifreeze. use your garden hose for the water :excuseme:

  • Matty05

Posted June 15, 2006 - 04:24 PM


Yeah, it works better.

Better at over heating! :excuseme:

  • bg10459

Posted June 15, 2006 - 05:39 PM


Read through THIS link and you will find:

"Water has twice the heat transfer capability when compared to 50% glycol antifreeze/coolant in water"

But don't take Redlines word for it, that's just advertising. Look HERE and they will tell you:

"Water transfers heat better than a water/antifreeze mixture. The more antifreeze you add, the worse the heat transfer capabilities."


"The best coolant, in terms of heat transfer ability, is water!"

Now, don't get me wrong. I do not suggest you run straight water. I use Water Wetter, which not only increases heat transfer ability but also provides corrosion protection. I also add a small amount of glycol, but there's no need to use 30% or 40% glycol mixes unless you need freeze protection. You're just increasing your engine temperature by doing so.
So what about boil over protection, you ask. Well, if you read the last link you would know that a 15 psi cap will increase the boiling point of water to 250 degrees F. If you're running at 250 degrees, I think you've got other problems. With my coolant mix I have only boiled over once, blazing new trails in the middle of the woods.

Boer, all else aside, topping off with water is OK because, unless you lost coolant to a leak, it probably was lost as steam blown past the cap. You have only lost water in this case and your glycol mix actually got richer.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Matty05

Posted June 15, 2006 - 05:47 PM


All that mumbo jumbo doesn't really mean anything.

Coolant is use to keep the engine temps stable. If Coolant is so bad, then why do you still use it?

  • bg10459

Posted June 15, 2006 - 05:53 PM


10% glycol, which is about 5 oz. in our bikes, will give me around 20 degree freeze protection.

  • Numskull

Posted June 15, 2006 - 06:04 PM


oh ya, I forgot he said his tank(radiator was empty :excuseme: )

Where did all that coolant go ?

theres no dought that water has better cooling properties than anti freeze, and theres no dought that water will corode, oxidize, wont lubricate etc. not to mention it freezes some where around 32 degrees. Pure anti freeze dont have the cooling capacity as water, so you mix the two to get the best of both worlds, thats all, nothing complicated about it.

But never run staight water unless you want to destroy your cooling system real quick.

  • Matty05

Posted June 15, 2006 - 06:13 PM


Yes H2O is best thermal carrier, but what about engine hot spots? Internal steaming?
what about when no air flow through rads?

I also like the water wetter term that redline use, they just use aerosol as a coolant.

  • lairpost

Posted June 15, 2006 - 06:33 PM


How about 100% inhibited Propylene Glycol?

  • Matty05

Posted June 15, 2006 - 06:44 PM


How about 100% inhibited Propylene Glycol?

NPG-R is my favorite!

  • lairpost

Posted June 15, 2006 - 06:55 PM


Yep, that's what I run. Good chit.


Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.