Kubota L3940 HST - Radiator Capacity vs Cooling System Capacity

[YLee Kioti]

Agreed, but I am yet to see any premixed coolant that labels distilled water on the label.

I do not put tap water in any of my cooling systems.

SDT

Read the fine print closely.
I know I broke the man code so don't spread it around!
But the pre-mix is done with de-ionized water, about as pure as you can get.
This is the level of water purity that passes through the steam generators in our 1300 megawatt generating station.
So yeah you're good to go.

 

[RjCorazza]

For those that perform as much maintenance as possible this is a worthwhile investment.

Amazon.com: 4-in-1 Refractometer Ethylene Glycol, Propylene Glycol in antifreeze liquids freezing point temperature and freezing point concentration, automotive and industrial battery liquid,by Hamh Tools: Home Improvement

The cheap auto retail shop tester with a simple float is well a rough estimate.
So decided to upgrade to this. Used it on 4Rnr recently and satisfied.

It's the same type we used in our motor pool to maintain our fleet.

Refractometers are the tool to have when measuring coolant concentrations. They are much more accurate than the floating ball type devices.

 

[Leejohn]

Refractometers are the tool to have when measuring coolant concentrations. They are much more accurate than the floating ball type devices.

Why do you have to that close??

 

[RjCorazza]

Clearly the truth is the final concentration doesn’t have to be exact. I prefer more accurate instruments regardless.... plus refractometers are fun to use!

 

[YLee Kioti]

These have more uses.
Also for battery maintenance as well.
But hey if you happy with your floaters clap your hands and show it....lol....YMMV as always right....

 

[dstig1]

It's been a while since I last flushed a vehicle (just too much to do with my house build) but here is how I always approached it:
1. First off I flush, not drain and fill. I do this by running a garden hose until it runs nice and clear through the entire system. It often helps to pull the Tstat to do this. I capture the early stuff and recycle as required, but once it starts running pretty clear, i just let it run down to the storm drains.
2. The system capacity is always listed.
3. Once you have flushed it, drain as much as you can and seal it back up except the fill ports.
4. Refill with 100% antifreeze until you have put in roughly half the total system capacity in antifreeze (4.35 qts in this case)
5. Any remaining space gets topped off with water
6. Run the engine and get it warm to get the air out of the system. Top off with water.
7. You should have as close to a 50/50 mix as possible.

I'm not going to argue about distilled vs tap water. Feel free to argue amongst yourselves...