1935 Dodge Coolant system

[Larry McCarthy]

I'm re-doing the coolant system on a 1935 Dodge. Can anyone recommend the correct coolant, global or etheleyn glycol or other ? And should I add a anti-rust water pump lubricant ?

Thanks

[Bloo]

If you need the boil/freeze protection of ethylene glycol, I suggest Valvoline/Zerex G-05. It probably isn't the only ethylene glycol coolant with anti-foaming properties, but it is one I know of. Old style green formulas tend to foam horribly and push coolant out in unpressurized systems. There are probably a few that don't but I don't know which ones they are. More here:

 

 

If you live in an area where freezing is not a possibility, and want to run water, you could add soluble oil, also known as machinist's milk oil. It is the same white liquid that was once sold as "water pump lubricant and corrosion inhibitor" in auto parts stores. @edinmass does that but he lives in Florida .

 

@Grimy in San Fransisco uses an additive called Pencool. @Stude Light uses no-rosion, and drains it out in the winter. I don't trust myself to do that in time. The weather turns suddenly where I live, and It's hard to come back from a cracked block. More details here:

 

 

Several of us are using a stocking or a Gano filter or both to keep the rust and debris that is coming out of the block from plugging the radiator. Details here:

 

 

 

Edited June 1, 2023 by Bloo (see edit history)

[Stude Light]

9 minutes ago, Bloo said:

@Stude Light uses no-rosion, and drains it out in the winter. I don't trust myself to do that in time.

Actually I don’t. I have the luxury of a heated building 😁 but I do use No-Rosion with EG to extend corrosion protection. Just to be clear to OP, I use water as a coolant in my early cars with No-Rosion as the lubricant and corrosion inhibitor - best heat transfer fluid ever invented 😉

Edited June 1, 2023 by Stude Light (see edit history)