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  • 160 vs 180 vs 195 thermostats in the 258/232

    Does anybody know why Jeep installs the 195 degree thermostat in the 258cid and 232cid engines as standard equipment?

    I've always understood that an engine needs to run at least 175 degrees to achieve optimal performance, combustion and such.

    What conditions would require someone to run the 160 degree thermostat?

    I'm running the 180 now. I had the 195, but didn't like the engine running that hot.

  • #2
    175 is realitively cold........most automobiles are normal in an operating range of 200-215.....on average, on some high performance vehicles, such as a Z28.....well the first fan turned on at 245 and the second at 257.......why they are designed to run that hot.....i dont know.....with a 4x4 i could understand wanting to open up sooner, just as a preventative measure, bc of all the idling and such.......but 195 is not hot by no means....relatively speaking that is

    -goat

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