Rummley

[flying belgian]

Post below got me wondering. Why wouldn't we use oil to cool the engine of today?

 

[Janicholson]

The oil has only medium to poor thermal conductivity. Though it allows higher combustion chamber temps than water in an open system. It doesn't fare well against coolant with pressurized system. It is flammable (though Oil Pulls are not known for burning). It was in competition with alcohol (methyl and ethyl) for antifreeze protection, both of which lower boiling point dramatically when mixed with water to withstand temps encountered. Jim

 

[buickanddeere]

(quoted from post at 22:10:21 08/26/23) Post below got me wondering. Why wouldn't we use oil to cool the engine of today?

This is why .

 

[stevieb49829]

See, ask a stupid question, and get brilliant, thoughtful answers. I'll have to remember that next time I have another question!! steve

 

[rustred]

Diesel was used in cats as a coolant years ago. Cause they were too cheap to buy antifreeze.

 

[caterpillar guy]

With oil it will take a lot more radiator cooling space and a lot more oil to cool the same engine cooled with antifreeze coolant. I had an oil cooler go bad leaking into the cooling system on the semi one time. I could hardly keep it below 200 degrees with the fan on full time by the time I got home to change it. Once changed it would stay under 200 at the 180 figure unless I was pulling heavy in hils or up mountains then I would flip the switch to keep the fan running full time. I usally did that from March to November anyway. Just let the fan clutch cool it during the winter

 

[rrlund]

We have antifreeze now. I think oil was preferred in those big old prairie tractors so they didn't have to be drained every night if threshing went in to the cold months.

 

[Bill(Wis)]

The only antifreeze they had in those days was alcohol which boiled at a lower temperature than water in non-pressurized radiators so they used water and then had to drain it every night. And, as others have pointed out, they would run those Rumley's all year around. Some areas saw threshing being done in late fall and even in the winter. The grain bundles were stored in the barn until the threshing crew got around to them. In our little part of Central Siberia the Rumley went in a shed that was built just the right size for it and it ran a sawmill all winter long. We didn't see ethylene glycol used as a coolant until after WWII (The Big One).

 

[coonie minnie]

I believe some engines do... some small Duetz engines used in skid steers have used oil cooling in recent years.