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Normal idle temperature

HMMWV DAD

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I'm a new owner of a M1123 with the 6.5 engine. What is a normal temperature reading on the temperature gauge for a truck that is just idling? Thanks

I have watched this forum for a long time and are impressed with the knowledge and willingness to help others.

HMMWV DAD
 

Coug

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Operating range is 180-220. Once the engine is warmed up, it should stay within that range during idle.

Outside temperature will affect engine temps, but it should still be in that range in all but the most extreme conditions.

In very cold weather it might take a long time to warm up to that range if all you are doing is idling the engine and not putting any load on it.
 
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