Consensus on preemptive thermostat replacement?

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by mrand, Mar 29, 2025.

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  1. mrand

    mrand Junior Member

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    Coming up on 140k miles on my 2014 Prius V and I'm going to do a preemptive water pump replacement while cleaning EGR.

    I see various discussions about people replacing their thermostats when they have coolant issues, but how many have actually been bad? I'm weighing the relatively minor cost of thermostat + housing replacement vs. the minor risks associated with replacing it (mainly creating a problem or leak where there isn't one right now).

    Thank you!
     
    #1 mrand, Mar 29, 2025
  2. frodoz737

    frodoz737 Top Wrench

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    EGR clean and water pump R&R? Yes..replace the thermostat.
     
    #2 frodoz737, Mar 29, 2025
  3. rjparker

    rjparker Tu Humilde Sirviente

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    If money is a limiting factor I would forego the thermostat if it meant I could get an oem pump rather than aftermarket.. Regardless I would keep my old one because I believe if it's not broken don't fix it. 330k miles later on my v, originals are still fine but I have drained and filled the coolant about ten times.
     
    #3 rjparker, Mar 30, 2025
  4. Mendel Leisk

    Mendel Leisk Senior Member

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    #4 Mendel Leisk, Mar 30, 2025
    Last edited: Mar 30, 2025
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