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Thread: 180 degree thermostat

  1. #11
    Grasshopper
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    I have a ridiculously LOW 145 degree thermostat on my 99 5.2 Durango. I have never been close to overheating until my oil pump failed. (Unrelated to the thermostat.) My truck has over 300,000 miles on it and it is still my daily driver. I highly recommend a lower temperature thermostat if you want your engine to last longer.

  2. #12
    Durango Jedi Skippy426's Avatar
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    Quote Originally Posted by xarlock667 View Post
    I have a ridiculously LOW 145 degree thermostat on my 99 5.2 Durango. I have never been close to overheating until my oil pump failed. (Unrelated to the thermostat.) My truck has over 300,000 miles on it and it is still my daily driver. I highly recommend a lower temperature thermostat if you want your engine to last longer.
    A lower temperature thermostat won’t make your engine last longer. Plenty of cars on the road with 180F or higher thermostats with way more miles than yours.


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  3. #13
    Durango Jedi
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    Brother's '98 Dakota 5.2L over 420,000 stock 195*? thermostat.
    My 2001 Durango 4.7L over 357,000 stock 195* thermostat.
    2006 300 Hemi, 228,000 stock 203* thermostat.

    Nah, don't really need lower t-stat for longer engine life and it will run a bit richer with FI thinking the engine is still not up to full operating temp. Besides, your engine will just end up running right at the OEM level around town as the fans are set to turn on with the stock t-stat, unless you change them with a tuner.

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  5. #14
    Grasshopper
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    On the early Dakotas with the 318 they were notorious for part throttle spark knock. I had like a 96 I think. The T-stat was 200 or something and putting the 180 got rid of that because as was mentioned it adjusts the timing and fuel mixture richer so runs a bit cooler.

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