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Old 04-12-2011, 10:34 PM
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Normal temp after shutting off Hemi

Just took delivery, very happy, feel lucky to get this Jeep, it's fantastic.

Thanks to all on this forum and especially Milous for all the help.

My first question relates to temp ranges, haven't been able to check the full owners manual yet, but after the shutting it off noticed the temp of coolant get to 233.

Is that normal?

Thanks for any feedback.
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Old 04-12-2011, 10:45 PM
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Re: Normal temp after shutting off Hemi

I have not really watched the temp after shutting off, but I did notice that when stopped with it just running 225deg seems to be where the cooling fan kicks on. The temp will rise somewhat after shutting off so this does sound normal.
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Old 09-15-2012, 10:39 PM
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Re: Normal temp after shutting off Hemi

i recently had my upper radiator hose come off clamp and hose ,i put the hose back and now my temperature is coolant 220 was 199 to 202 in hotter weather i also noticed the oil temp 220 was 199 to 201 again in summer weather i took it to the dealer and all they did is top it of with coolant,and also the power steering fluid was very low ,could it be air in the radiator,any ideas?
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Old 09-16-2012, 09:24 PM
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Re: Normal temp after shutting off Hemi

Yes: a 180F thermostat. Fan should be on with a/c (a/c will not work well below about 50 mph without). Have seen cars hot soak to 250 so 230 is no big. 220 when running is a problem, I feel mine is too hot at 203.
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Old 09-17-2012, 10:04 AM
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Re: Normal temp after shutting off Hemi

it's a gasoline powered combustion engine
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Old 09-18-2012, 11:18 AM
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Re: Normal temp after shutting off Hemi

Engine will heat soak after being shut off within minutes......JB.
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Old 09-18-2012, 05:04 PM
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Re: Normal temp after shutting off Hemi

In order to transfer heat, one part needs to be cooler than the other. There is always some thermal lag and resistance in the metal between the combustion chamber and coolant. That means the metal near the combustion temperature is hotter than the coolant. When there is coolant flow, the coolant that has absorbed the heat moves out and is replaced. When you shut down, there is no coolant flow (in these engines, some others maintain flow). But the heat continues to be absorbed by the coolant until there is equilibrium (the metal and coolant are the same temp). The coolant temperature is now higher than it was. So, depending on sensor placement, you would expect the temperature sensor to indicate a higher coolant temperature after engine shut down, until the entire engine cools off.
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Old 09-18-2012, 07:23 PM
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Re: Normal temp after shutting off Hemi

See the same thing at a stop light after coming off the Interstate if you have a good gauge. Hot soak.
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