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D17 IV Thermostat 160 or 180F?

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Stan R View Drop Down
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Joined: 03 Dec 2009
Location: MA
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    Posted: 17 Mar 2013 at 7:21am
What is better to put in? Thanks

Edited by Stan R - 17 Mar 2013 at 7:34am
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DrAllis View Drop Down
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Joined: 12 Sep 2009
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 17 Mar 2013 at 7:39am
160F was factory installed......180F is if you want it hotter for maybe wintertime operation.
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Gerald J. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gerald J. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Mar 2013 at 10:37am
160 for alcohol antifreeze, 180 for ethylene glycol (permanent) antifreeze and if you want to get it hot enough to boil condensation out of the crankcase. The engine efficiency will be a bit better with 180 as the cylinder walls and head will be a little warmer and so absorb a little less combustion heat.

Gerald J.
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DSeries4 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Mar 2013 at 10:43am
I put 180 in all of mine.
'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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