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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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"does it get hotter for a bit " No.
The total heat energy of the engine does not increase, once shut down. The water, local to the head, (maybe even external surfaces) may see a temp rise, (compared to when pumping) but the engine has not increased in overall temp.
edit: . . . it's a "transient heat" thang.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
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