Coolant replacement

Got it. Thanks.

I'm digging up an old thread. I'm replacing the Water Wetter with Prestone just for storage in case my garage dips below freezing. However, I only was able to fill about 1.5 liters of coolant in the radiator versus the 2L in the spec.

I realize there are hoses and passage ways that need to be filled. I've run the motor, warmed it up and topped it off but I'm unable to fill it with a full 2L of coolant.

Any ideas why?

I had same issue just a month ago when I swapped out the stock fluids on my V4.

I filled up the radiator and put about 3 inches of WW in the expansion tank on right side

Then I heat cycled the engine on a short drive and had to put more in the expansion tank several times. Just a inch or two at a time.

The last time I added some, it kept the level constant. even on a Saturday 300 mile journey

Eventually, I was very close to the 2 L

After draining the system I find it takes a couple of heat cycles to get the air worked out. I just let the bike warm-up until the fans turn on.

Any tips to completely flush out if I'm switching from factory Agip(pink stuff) to Motul Motocool Expert (yellow stuff)?

Open the drain bolt remove the radiator cap and squeeze the hoses you can touch.

Then refill the amount that you lost and get a couple heat cycles you will find that you end up having to add more and more to the expansion tank on the right side. Once the level there is constant you’re good.

To completely get out everything you’re going to have to flush with some distilled water and get a couple heat cycles as well.

Jag

SirJAG said:

Open the drain bolt remove the radiator cap and squeeze the hoses you can touch.

Then refill the amount that you lost and get a couple heat cycles you will find that you end up having to add more and more to the expansion tank on the right side. Once the level there is constant you’re good.

To completely get out everything you’re going to have to flush with some distilled water and get a couple heat cycles as well.

Jag

Click to expand...

Thanks!

Would you recommend I use something like radiator cleaner (photo attached below) during the distilled water flushing stage?

jackyff8 said:

Thanks!

Would you recommend I use something like radiator cleaner (photo attached below) during the distilled water flushing stage?View attachment 58773

Click to expand...

I’ve never used that I cannot speak to its effectiveness. And I’ve always flushed my Ducati’s early and often…. Never had any issues.

I don’t run any antifreeze though, the bike never sees freezing temps

Jag

Oh, for reference, it took me about 1.5 gallons of distilled water before all of the pink was gone.

But I know that doesn’t get everything you will have to do heat cycles and more flushing

Word of advice. I switched to WaterWetter for track use. I recently open trailered my bike from AZ back home to CO. Temps were above freezing most of the trip back except for an hour or two where they dipped to the 20's coming over the passes. Apparently that was enough to pop a weld seam on my radiator. Dumb. Don't be like me.

JFlo said:

Word of advice. I switched to WaterWetter for track use. I recently open trailered my bike from AZ back home to CO. Temps were above freezing most of the trip back except for an hour or two where they dipped to the 20's coming over the passes. Apparently that was enough to pop a weld seam on my radiator. Dumb. Don't be like me.

Click to expand...

good note here man...100%...got a space heater in my garage just incase!

Me too

JFlo said:

Word of advice. I switched to WaterWetter for track use. I recently open trailered my bike from AZ back home to CO. Temps were above freezing most of the trip back except for an hour or two where they dipped to the 20's coming over the passes. Apparently that was enough to pop a weld seam on my radiator. Dumb. Don't be like me.

Click to expand...

Ya, that's why I flushed out the water wetter and put in regular prestone just in case the garage gets below freezing over the winter. Going to reflush it in the spring.

SirJAG said:

I’ve never used that I cannot speak to its effectiveness. And always flushed my Ducati’s early and often…. Never had any issues.

I don’t run any antifreeze though, the bike never sees freezing temps

Jag

Click to expand...

Digging up an older thread here but i'm planning on flushing the oem fluid out and replacing with a 70/30 mixture (70% distilled 30% antifreeze) , the OEM stuff is Ethelene glycol which to my knowledge has better cooling properties over propylene glycol products.


When it comes to Ethelene vs propylene - ETH will be the winner in thinner viscosity for better flow , easier on the water pump & better thermal transfer . Usually isn't used because its toxic to humans / animals.

https://www.superradiatorcoils.com/...propylene-glycol-different-which-should-i-use

I may stick with the OEM stuff and just dilute it down. They have handheld testers to see the freeze protection of the mixture you create.

I want to keep the antifreeze just for the touch of lubrication and corrosion protection especially for the notorious water pump issues the v4 has , however a 50/50 mixture is thicker in viscosity & is safe down to like -32F ( ill never see these temps , i hope at least lol ) and a 70/30 being thinner and higher flowing also is safe to roughly 5F~ & the boil over protection most importantly for the event im ever stuck in heavy traffic.


I also see VP stay frosty , makes a 0 freeze protection 100% water based product that project farm just tested and it did phenomenally i would love to use this style of coolant, & anyone running the water + water wetter should try it as his test shows its top notch cooling. however i'm afraid of the event of overheating in dead stop traffic.

i also recently research that in a pressurized system like a engine cooling system has , every 1 psi = 6-8F of boil over protection. so it is a consideration of mine to dabble with this vp racing stay frosty version below , just will heat up faster in non moving situations compared to an antifreeze setup. Does anyone know the PSI of the OEM pani v4 cooling system? Will changing rad caps to higher psi ones increase the system boil over protection?

https://vpracingfuels.com/products/stay-frosty-race-ready-racing-coolant