Isn't that little CAT engine, really a Perkins??
When the first gulf war was going on, and sadam lit the oil fields on fire, my friend went there to help put those fires out. My friend said it was hotter than blazes out there, and the only engines that could take the extreme heat was Deutz air/oil cooled. They had them on their gen sets and he said, they just kept on ticking!
I have nothing but good things to say about the Deutz air/oil cooled diesels i've owned, i still have one and i agree, you have to keep them clean.....a 10 minute job at most...
There's lot's and lot's of air/oil cooled Deutz tractors still on the job here, all of them STILL making money for their owners!
SR