220F is nothing.
The motor will tolerate 220F - 230F no problem.
My car used to regularly hit 225F, as I was using the stock thermo switch as a trigger.
(The stock thermo switch is supposed to switch at a 207F spec, but my SPI water temp gauge said it didn't trigger till 225F.)
We've had our race car hit 250F - beat that! - and it still held together on the track.
Not that I recommend doing this...
-Ted
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