Schedule for changing coolant?

[ewdysar]

Aftr reading the “coolant thread”, here’s a related question.

1) Is there a factory recommended schedule for changing coolant in a T? If not, what is yours and why.

Please avoid providing more information about your coolant choice, you can post that in the other thread.

Keep crankin’
Eric

[Ruxstel24]

Most green coolant manufacturers recommend changing at 3 years.
I believe coolant does not really go bad, but gets contaminated with calcium deposits and iron.
Keeping the system clean is the most important part next to freeze protection.

[KWTownsend]

With an open radiator system, like the Model T has, does the antifreeze evaporate along with the water or does the antifreeze concentrate as the water evaporates?

[Steve Jelf]

Antifreeze evaporates too, but I don't know if it's at the same rate as water, so there may be some concentration over time. But replacing the evaporated water/coolant mixture with water dilutes what's left.

[DanTreace]

Likely one can’t find period maintance schedule for the T’s cooling system.

For me, have always done annual drain, flush with hose in the radiator neck and open drain cock till all runs clear. Sometimes each year the drain cock needs a wire up into it as the stream is weak and some flakes of stuff falls out.

Then refill with fresh green antifreeze/anticorrision mixed with distilled water.

Then I expect most of the core is clean, with doing this over the years my new radiators have lasted now for 3, 6, 12 over 40 years in my longest owned T

[John.Zibell]

Change when needed. These test strips will tell you when it is time. https://www.amazon.com/Cool-Trak-311519 ... B000MIUJMO Only work with the green stuff.