P261B Estimated Water Pump Life

Discussion in 'Gen 3 Prius Main Forum' started by MexicanChip, Dec 6, 2020.

  1. AZBill

    AZBill New Member

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    Replaced mine on the 2013 Prius at 182k, noticed a red coolant seep/crust around it while doing other PM work on the car, also replaced the Thermostat. Did both as a result of reading this forum and deciding its a good PM move, especially as the car is driven in Arizona heat. Bought pump and thermostat from Rockauto (Aisin brand is OEM)
     
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  2. skibum

    skibum Junior Member

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    Last fall replaced the pump, coolant, differential fluids, 175k miles, all preventative maintenance. Auto shop said the pump was fine, still had it changed, diff oil was filthy which was expected. Hopefully my son can get another 100k miles out of it.
     
  3. Supersonic1

    Supersonic1 New Member

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    124,000 Miles for 2012 Prius V engine coolant pump......One Prius maintenance expert whose article I read firmly recommended 120K for the water pump replacement. Since I had just passed that mileage, and I now consider my 2012 Prius V (124K miles) a 10 year-old vehicle, and I live in Las Vegas with 100-115 outside air temperatures, I was seriously considering it. Then last weekend, I saw a coolant temperature light come on for about 5 seconds then go off. No other indications of trouble. So this week I decided to have a local shop replace the engine coolant pump, thermostat, and inverter coolant pump. Here is the photo of the old engine coolant pump. Note the cracked plastic covering on the rotor. The engine coolant pump was indeed going to fail soon and I am glad I got it replaced before it did. Note: Engine coolant had been changed at 64K miles and at 116K miles.

    IMG_0811.jpg
     
    #23 Supersonic1, Aug 26, 2021
    Last edited: Aug 26, 2021
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  4. cocot007

    cocot007 Junior Member

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    Is the shaft on the water pump supposed to spin? I just got a new Aisin pump in the mail box was damaged. Impeller spins shaft does not is this normal?
     
  5. Mendel Leisk

    Mendel Leisk Sand Pounder

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    Doesn’t sound right; @Raytheeagle should know.
     
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  6. Georgina Rudkus

    Georgina Rudkus Senior Member

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    The impeller is the only part that spins. The shaft is integrated with the stator inside the cartridge. It is a magnetic electronically controlled brushless coupling. No, the cartridge does not spin.
     
  7. Raytheeagle

    Raytheeagle Senior Member

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    Something does sound awry :whistle:.

    @cocot007 , can you take some pics of what you are describing as there maybe confusion as to what is what;).

    We can help with more information(y).
     
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  8. 2010moneypit?

    2010moneypit? Junior Member

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    Just bought my 2010 Prius. Head gasket was done by dealership under warranty at 148,000 but they did not replace the water pumps. What is the best place to get good quality water pump does everybody say go to the dealer? The car currently has 190,000 miles on it the head gasket was done about a year and a half ago.
     
  9. ASRDogman

    ASRDogman Senior Member

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    Ebay, amazon, auto parts stores... you'll find various prices.
    You want an "Asin" brand, supposedly, they make them for Toyota.
    Average price is around $200.00.

     
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  10. Mendel Leisk

    Mendel Leisk Sand Pounder

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  11. 2010moneypit?

    2010moneypit? Junior Member

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    Thank you for the fast response.
     
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  12. johnHRP

    johnHRP Junior Member

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    Aisin is the exact same part with Toyota engravement scratched. Aisin also sell coolant but not sure about the colors, sometime Blue but mau be red or pink too. We can use Pentosin or Zerek too.
     
  13. ChapmanF

    ChapmanF Senior Member

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    Usually when things are called "exact same part", it's done without going much into how the manufacturer decides which ones to sell to Toyota and which ones to scratch the engraving off of and sell elsewhere.
     
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  14. wr69

    wr69 Junior Member

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    Replaced my water pump and thermostat (with OEM from online USA Toyota dealers) at about 140k miles on Gen3 2010. I think the thermostat is much more robust, but while you have everything open and drained, might as well chuck in $35 t-stat, fairly easily. Seems a bit of a shame dealers dont warn you about potential hazardous failure scenario and then just wait until you fry the pump naturally and then replace it. I had coolant done at 125k by dealer. Would have probably done the pump - if they told me about - unless it was at "stealership" prices.

    Regarding lifespan, I would think this is dependent on environment and driving style. for example, a "short drives" car could probably have a pump last another 50k compared to a highway car. Similarly, a car in Washington state (cooler temps 6-8 months out of the year), might have much less wear on a pump, compared to a Florida/Nevada car. Also, if you suspect anyone ever used coolant sealer "junk" (bars leak, or similar), I would definitely swap the pump ASAP, as I think that will create extra drag and pressure on the smaller tolerances of the pump.

    I ran across a few tips and tricks when doing my swap. Will try to post in a write soon.
     
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