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Gen 3 vs Gen 4 water pump replacement

Discussion in 'Prius v Technical Discussion' started by Kpeeling, Aug 21, 2024 at 6:45 PM.

  1. Kpeeling

    Kpeeling Junior Member

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    Does anyone know, first hand, if there is truly a difference in the method for replacing the water pump on these two generations? I've watched several videos and I'm seeing that some mechanics say you must drop the engine to get the pump off in the Gen 4 models yet in Gen 3, you can get it off under the hood without dropping the engine. I don't want to do more work than I need to by putting it on jacks if I can avoid it. I have a 2017 Prius V with 208k miles.
    Thanks in advance.
    Kathy
     
  2. rjparker

    rjparker Tu Humilde Sirviente

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    There are two water pumps, one for the engine on the passengers side and the other for the inverter and transaxle on the drivers side.

    I will assume you are talking about the engine water pump. Your 2017 v wagon is gen3 and you can get it off pretty easily. Some do it from the top only although you have to feel for the bottom and back bolts to do it.

    Don’t use anything except oem Toyota water pumps, the aftermarket and counterfeit units fail quickly.

    Aftermarket (maybe Aisin)
    IMG_6044.jpeg


    Online Toyota dealer
    IMG_6041.jpeg
     
    #2 rjparker, Aug 21, 2024 at 6:55 PM
    Last edited: Aug 21, 2024 at 7:21 PM
    Kpeeling likes this.
  3. Kpeeling

    Kpeeling Junior Member

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    Thanks. I was talking about the pump on the passenger side. I was thinking that the 2017 was Gen 4 since this chat site lists Gen 4 as starting in 2016. Maybe the next generation of changes aren't in the Prius V since it was being discontinued? I have bought an Aisin and can see where the Toyota name was ground off. Napa told me it was the same as OEM but cheaper. Should I replace the thermostat too while I'm in there?
    Thanks again
    K
     
    #3 Kpeeling, Aug 21, 2024 at 7:30 PM
    Last edited: Aug 21, 2024 at 8:54 PM
  4. rjparker

    rjparker Tu Humilde Sirviente

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    the v was gen3 through 2017 in the US and through 2021 elsewhere.

    I would change the thermostat or at least get the gasket.

    I would make sure Napa gave you a 2017 Prius v part and not a 2017 Prius hatchback part.
     
    Kpeeling likes this.
  5. Kpeeling

    Kpeeling Junior Member

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    Thanks. I'll double check in the am.
    K
     
  6. MAX2

    MAX2 Junior Member

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    What were the reasons for replacing the pump?
     
  7. Kpeeling

    Kpeeling Junior Member

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    The car was throwing the P261B code numerous times and then had an incident where the yellow warning triangle popped on and I lost power. It all reset and I was able to get home without overheating but through another thread on this forum and a conversation with my mechanic, I was convinced that the water pump was on the way out. It's original equipment so with 200K miles, it doesn't owe me anything. The plans are to tackle it today. We'll see if we can get it out without dropping the engine. Wish me luck.
    K