Re: '37 120 Cooling Fan

Posted by TxGoat On 2024/7/8 10:30:23

Before I made any mods, I'd try running a 50/50 mix of a name-brand "green" antifreeze and distilled water. If you live in an area where freezing weather is not an issue, a mix of 60% water with 40% green antifreeze is even better. Evans coolant is a specialized product that offers no advantages in older vehicles. The 1937 120 non-pressurized system works best with conventional antifreeze and clean water.

An electric cooling fan can help cooling (a little) at idle and very low speeds, but it will restrict air flow at higher speeds.

Keeping the radiator clean inside and out will help, and keeping the engine in good tune will help. Ignition timing and distributor performance are important, as is the proper operation of the intake manifold heat system.
Anything that restricts air flow through the radiator, such as lights, badges, license plates, etc, is to be avoided.The fan belt needs to be the correct size and properly adjusted and free of oil, but not run too tight. A belt that is too tight can damage the water pump bushings.