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Water pump replacement, ideal interval?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by telmo744, Oct 13, 2024.

  1. telmo744

    telmo744 HSD fanatic

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    I have a 2010 with 180k miles, all maintenance and fluids at official shop from new.
    Last january service I asked for an engine water pump testing since it is original, i've been told it was ok.
    Should I simply replace it because of the age/work done or keep testing it or watching coolant temperature behaviour with scangauge? AFAIK 2010 model does not throw a code for too-fast spinning.
    Is there an ideal interval for this water pump replacement?

    Also watched some threads but got opposite results...
    good one replaced too soon:
    2012 156k Water Pump | PriusChat
    failing one at 11years old Prius:
    Prius Gen 3 overheating Uphills | PriusChat

    Thank you in advance
     
  2. JC91006

    JC91006 Senior Member

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    I like to look at this water pump like if it's a timing belt on a car with an interference engine. It will work fine until it breaks. Once it's broken, you may have to replace the engine at the same time. So the smarter thing would be just to replace it on a 2010, 14 year old car. Don't wait until it stops functioning.

    This water pump replacement is normally a 1 time replacement for the life of the car. Unless you plan to drive the car past 300k miles, you'll have to do this replacement 1 time and it's a done deal.
     
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  3. Tombukt2

    Tombukt2 Senior Member

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    Yeah and it's about a 45-minute job on a bad day too unless you've got a lot of cleaning to do and housekeeping and what have you under the hood that has been neglected for a long time It's very quick and if that kind of mileage with the head gasket problems these engine have any inkling of any kind of overheating is not a good thing and the ZFXE engine a water pump is cheap some kind of insurance I would guess of course you could always just take yours off take the back plate off pull the impeller out and have a look if everything looks nice and clean you could put it back together and stick it right back on there I haven't seen any nice clean ones come apart yet even in nice clean cars with 150 plus the impeller outer plastic is starting to crack and it's just a matter of time until it curls and starts impeding the speed of the impeller when it's called upon.
     
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  4. douglasjre

    douglasjre Senior Member

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    When it fails, if ever. Why would you focus on that one thing?
     
  5. telmo744

    telmo744 HSD fanatic

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    It is one of my concerns under the bonnet.
    And because it seems to me that a failing water pump could easily end up in another serious issues, like briefly overheating and evolving in upcoming head gasket problems.
    From my/our experience in ICE-only cars, water pumps have planned replacements, these rotating equiments do not last forever, even electric-driven ones.

    Thank you all for the comments, I'm right now more convinced in putting in a new one next service.
     
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  6. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Every 100k miles seems optimum to me, based on reports here about them failing around 150k. Could coincide with engine coolant change.
     
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  7. Pijoto

    Pijoto Active Member

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    I just changed my Water Pump on my 2013 Prius after 150K Miles, out of curiosity I asked the technician what the Water Pump looked like, and he said it looked good and wasn't leaking or anything, kinda kicking myself for changing it now, but the car is old AF, and I can sleep a bit better on having it changed.
     
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  8. StarCaller

    StarCaller Senior Member

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    Rather safe than sorry /
     
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  9. Merkey

    Merkey Active Member

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    My 2010, with 170k miles, has shown a P261B code on my scangauge. The dealer's equipment indicates a bad water pump but they are on back order. It will be a few days till it comes in. Price for part is almost $500.
     
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