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Inverter pump question

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Raphael Muscarelle, Jul 18, 2018.

  1. Raphael Muscarelle

    Raphael Muscarelle Active Member

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    2011 Toyota Prius 170,000 miles
    Ok I've been looking through the inverter pump threads.

    Well my questions are.

    What happens when the inverter pump fails?
    Is it safe to allow the pump to fail?
    Sugested maintenance if leave in original pump?
    Is there videos on it? Just would like to know if it's easier from top or bottom.

    I am all geared up to replace it because I heard the inverter will overheat and fail if the pump fails. I have a pump and coolant ready to go sitting here. I'd rather not do the work at the moment if it's safe to allow the pump to fail then replace it. I'm not having any problems at the moment I just put a lot of miles on it use it for work
     
  2. bisco

    bisco cookie crumbler

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    welcome!
    i think the car will go into limp mode, not the best thing on a highway. one member e=recently suggested a preemptive strike every 80,000 miles or so.
     
  3. Raphael Muscarelle

    Raphael Muscarelle Active Member

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    I just had a friend with earlier prius have pump short out. It stoped completely. He disconnected electric to pump and replaced fuse to get it off the road just like 200 ft.
     
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  4. bisco

    bisco cookie crumbler

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    yeah, might be worth changing it.
     
  5. Raphael Muscarelle

    Raphael Muscarelle Active Member

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    Ok answer is ah they really designed the inverter to come out to do this. AH WHO DOES WHAT THEY INTENDED. There is a bracket that all it does is hold 2 nuts from turning this is the difficulty on this job other wise it comes out from the bottom nicely. Except the mounting bracket needs to be bent in order to get the pump past everything. I left the 2 hoses on the pump disconnected from top and removed clamp to allow the hose to come out with out snagging. I advise anyone to take a picture on how these hoses are aligned because you will kink them putting them back in wrong orientation. Now this bracket that has these two nuts on it it is vertualy impossible to get back on once the pump is in place. SO ONCE It is past the obsticals I didn't put in place I put screws through to hold the bracket in place and glued it to the rubber mounts. Ha ha yeah. Wait till dry and continue.
     
  6. Raphael Muscarelle

    Raphael Muscarelle Active Member

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    Well I would like to share this osbservation. Ever since I had the car the a.c. unit has wined now this wouldn't seem connected but after I put new inverter pump in the a.c. is colder and wines a lot less. I am guessing it was drawing more energy then intended so the a.c. unit wasn't getting enough energy.

    I would like to report an increase in mph which I have like 4 per mile highway but can't say it was just from that since I cleaned out the ERG system at the same time.
     
  7. Tim Jones

    Tim Jones Senior Member

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    The inverter can go out even if the pump is good. I know it happened to me......research inverter problems more.... could go out any day.
    Make sure you have the updated computer and inverter software or it won't be covered.
     
  8. CR94

    CR94 Senior Member

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    What is typical life of the inverter coolant pump?
     
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  9. Raytheeagle

    Raytheeagle Senior Member

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    Lifetime for the Gen3 :rolleyes:.

    My plan was to swap it out at 200 k miles when I do the inverter coolant loop change.

    It’s a pricey little pump, but probably worth doing at some point(y).
     
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  10. saxyartsy

    saxyartsy New Member

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    Hi.
    I am buying a 2015 prius with 190k miles. I think i should replace the inverter pump
    and any doable maintenance.
    Can you send any detailed info how to get the pump out as I give up easily.
    You said bend the inverter bracket? Can you say more so I dont screw it up?
    also
    Besides the ERG -dont kno what that is, can you say other maintenance I should do?

    Manny
     
  11. Tim Jones

    Tim Jones Senior Member

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    Save youself some BIG $ problems...... don't buy it................... that's the miles when everything goes wrong................
     
  12. Mendel Leisk

    Mendel Leisk Patron saint of newly poured sidewalks

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    @Raphael Muscarelle hasn’t been here in some time, and managed to misspell the acronym EGR (Exhaust Gas Recirculation). For more information see first two links in my signature (on phone turn it landscape to see signature).

    At 190k EGR components, including EGR passages in intake manifold, will have a lot of carbon build-up. Optimum is to clean every 50k, my opinion only. Toyota says nothing.

    A heads up: having 190k and EGR (presumably) never cleaned, there’s a good chance the head gasket is letting go. Typically starts leaking coolant into combustion chambers at the wall between cylinders one and two.

    I’d change both engine and inverter pumps soon, and the engine thermostat.



     
    Tim Jones likes this.