Radiator coolant

[Masmith]

I have a 1958 Loboy that seems to have a coolant issue. I recently changed the coolant with a 50/50 mix and filled it accordingly. On one of the hotter days it appeared to be over heating, steam coming from the radiator cap. It took about a gallon of water to bring it to the top. I realize that is over filling it, but I was trying to figure out how low it was. The same issue occurred again several weeks later. There are no leaks on the ground, oil level seems to be the same, and no obvious leaks while running. Thoughts?

[outdoors4evr]

It should burp out excess fluid through the overflow tube. If there isn't a leak, the coolant level should find its "happy level" just slightly above the fins in the radiator. Might want to check it with an infrared temp "gun". The top radiator hose should run around 200 degrees. If it is getting hotter, then maybe it is time to do some cleaning. Maybe there is a buildup of gunk in the block and bolster.

[Rick Spivey]

It's a small leak either around a hose fitting, or on the radiator itself. Probably leaks so slow that it mostly steams away, leaving little or no trace. You will have to look real hard to find it, maybe with a light. An alternative would be to procure a pressure tester from an automotive store, usually loaned for free or a deposit that is returned. With very little pressure it should show up.

[tst]

make sure the overflow tube is not plugged also

[Glen]

Hi,
The clamps on the upper and lower radiator hoses need tightening occasionally, they can become loose over time from use, the top hose clamps more than the bottom clamps probably.
It is probably because of the heating and cooling.
The hose can leak if 1 or more clamps are loose.

The top clamps can be reached up under the hood, from the left side. If they are turned so you can get to them with a screwdriver, you don't need to remove the hood.
A short screwdriver can be used, if the clamps are turned right.
Some clamps have a place to use a wrench.
Use a good light to see up under the hood.

[RogerW]

When you put in coolant with anti-freeze you need to mix it before putting it in. Otherwise it will not circulate, being as it has no water pump. Same with adding to top it off.

[Eugene]

Assume, antifreeze on top of water or water on top of antifreeze. It mixes.

It will circulate. Thermosyphon. Winter/freezing temperature, get the tractor warm, that will start the thermosyphon, further mixing the water and antifreeze.