Water Pump Replacement

Discussion in 'Gen 3 Prius Main Forum' started by Shank, Aug 4, 2026 at 8:11 PM.

  1. Shank

    Shank Junior Member

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    I have a 2010 with 180k miles on it. I just wanted to get other people's thoughts on replacing the water pump proactively as a maintenance item before it fails. I'm not having any problems with it at all now, but I drive around rural Vermont a lot where a breakdown wouldn't be too great. I also worry about the engine overheating and a blown head gasket, but maybe I should just don't fix what isn't broken. The part is about $250 and I would do it myself. Thanks
     
  2. Merkey

    Merkey Active Member

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    I had an overheating event that stalled my car at around 175,000 miles. After it cooled down I was able to drive it to dealer. A
    new water pump was installed and it has worked great ever since, but not a cheap repair. I would recommend replacement before it fails.
     
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  3. Brian1954

    Brian1954 Senior Member

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    I recommend that you monitor the engine coolant temperature by using a display that connects to the OBD2 port. By doing this, you will know if the engine water pump starts to fail. The pump usually gradually goes bad. Then, you will have enough time to order a new pump and install it before the engine overheats.
     
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  4. CR94

    CR94 Senior Member

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    I try to pay attention to engine coolant temperature, especially on long uphills, when effects of an impaired pump would be most obvious.

    No hint of a problem with mine, so far.
     
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  5. rjparker

    rjparker Tu Humilde Sirviente

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    Monitor and consider having the part on hand for the day it does happen.

    Don't buy an aftermarket water pump even though they are considerably cheaper and more available.

    If cost is a major holdup, consider buying a replacement impeller for an emergency repair.

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