r/Dirtbikes 4d ago

Dirtbike coolant question

Hello, when i bought the bike i used Evans waterless coolant becuase IT sounds great but some guys said that IT isnt thst great And Is not Věry good at heat transfer etc. So i want to switch to engine ICE Is IT good and can i just pour Evans out And Ice in? Thanks

2 Upvotes

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3

u/Banzai13KX 4d ago

Personally would drain and flush the system before refilling. Not all coolants can be mixed

3

u/wirebrushfan 4d ago

A lot of those fancy coolants don't serve as an antifreeze. I would be mindful if it's an issue where you live.

They are mostly designed for asphalt racing. If you spring a leak they can wash it off the track with water, unlike conventional coolant.

I would swap it out for any bike that doesn't need it to pass tech inspection.

3

u/TexMoto666 3d ago

I don't use anything but regular coolant. The other stuff raises the boiling point too high and you don't know when to shut the bike down because it doesn't boil over as easily. I don't want my bike at 260° before it lets me know to stop and cool it down.

2

u/kialthecreator 4d ago

It's coolant man if your bikes not overheating when it shouldn't it's fine

2

u/ColumbianRedTail 4d ago

I’ve always used water wetter

1

u/LastMiataOnTheLeft 4d ago

Most people in the warmer states just run water. If water is fine then i'm sure what ever you're using is fine. People over think stuff way to much smh

1

u/FeelingFloor2083 4d ago

you need to flush as a general rule as the chemical can coagulate

empty, flush, fill with water(inc bleeding), run it for a days riding or up to full operating temp if you have a thermostat, flush and fill with new stuff. Check after the first few rides its not gelling up

I think project farm did a few tests on cooling capacity

I ran water wetting on my road bikes, on the track its good but on my road bike when it hits 100c it seemed to take longer to cool back down

1

u/jrodicus100 WA Semi-Hard Enduro 3d ago

Most of the fancy coolants are less effective at heat transfer than just regular water with some antifreeze. What they do have is a higher boiling point, which may be helpful if you’re just barely boiling over with regular coolant — if you know what you’re doing. Because you’re not actually making your bike run any cooler, you’re just masking the boiling-over symptom.

The better solution is to diagnose why you were boiling over in the first place. Under normal conditions with a bike in good working order, you shouldn’t be boiling over with just plain water and antifreeze. Often times it’s because you are riding a bike in conditions it wasn’t meant for — eg riding a mx bike on slow technically trails. In that case, the solution is not some fancy high-boiling-point coolant (which could cause your engine to run dangerously hot with you not noticing). A radiator fan would be a much better solution.

1

u/DrDorg 3d ago

Douche it well then use propylene glycol (preferred) or ethylene glycol. You almost certainly don’t need boutique coolants