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  1. #1
    Join Date
    Apr 2017

    G-400 or G-300 Thermostat?

    Hi all,

    Does anybody with a G-400 or G-300 Chrysler Slant six powered unit know what temperature engine
    thermostat it uses? 160, 180, or 195 degree? The last owner of my unit apparently had overheating
    problems and ditched the thermostat before he finally had the radiator re-cored, but didn't replace the 'stat.

    My only clue is that the Chrysler Industrial H-225 engine manual that should come with the unit ( I have a
    1971 engine and found 1965 and 1982 manuals cheap on ebay ) and they both mention warming the engine to
    160 degrees before setting the valve clearance, which should mean 160 degrees is operating temperature.

    180 degrees is standard for automotive 225 cu in engines, so I'm wondering why the difference?


    Jim T.

  2. #2
    Join Date
    Jul 2005
    If it was mine I would put a 180 in it and if there are no issues leave it in.

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