I know that this question and answer were here before. But I cannot find in the archives.
On a Farmall C with a thermo-siphon cooling system, should the radiator cap be the pressure type or non pressure type? When I talked to the owner of O.E.M. tractor parts at Red Power Roundup this summer, he told me that there were two types. One with a lever that is pressurized and one without that looks like a gas cap but has “WATER” embossed on it. Mine has the lever type on it now and seems to work fine but is missing the gasket around the top and sometimes it steams out the cap and gets all over the paint if I run low on water and it starts getting hot (done this once this summer accidently).
I always thought that the thermo-siphon used a non pressure type to allow the water to flow correctly. Any experts out there with an answer?