Coolant

[Coker61]

Hi.what kink of coolant goes in a 12v71n? Do you poor it directly into the filler cap on the heat exchanger?

[cenger]

You can buy Detroit Diesel Power Cool from a DD deal. I prefer to use Napa's heavy duty antifreeze and coolant (pink, not green or orange). It is the same thing an a lot cheaper. Napa Coolant.jpg

[cenger]

Pour into the filler cap. Its hard to do on my 55C so I use an electric transfer pump.

[Captain Ralph]

Hi.what kink of coolant goes in a 12v71n? Do you poor it directly into the filler cap on the heat exchanger?

I pour/pump directly in the heat exchanger. A couple of gallons coolant, couple of gallons water. Trying to keep a 50/50 mix going. When the last gallons go in, when it comes down to the final gallon / quarts, I error on the side of more water.
Then just coolant in the recovery bottles.

In FL, I usually run 60/40 (water/coolant).
Were never going to freeze, still plenty of chemicals for the iron, rust protection, gaskets & seals, still lots of boil over protection and it's the water that moves the heat.