Inverter coolant loop question

was the replacement pump a Toyota OEM pump?

 

I have an OEM in my '06 and a fake in my '09 between the two I can't tell by looking at the part or at the flow in the jug both look about the same make about the same amount of noise all of it The test is go out and get the car hot and make sure that coolant hoses that involve the inverter are all the same temperature in other words the coolant is moving through the bottom of the inverter and making its complete loop if it is the hoses will be the same temperature pretty much In other words all warm when my pump was out underneath my inverter would be toasty warm but the lines going to and from the pump were room temperature at best or ambient temperature and that's how I knew I wasn't moving the coolant

 

As a single data point, mine never looked that turbulent before or after a pump change, at least when compared to some others on here.

Unlikely that the inverter would fail if you threw a P0A93, unless you continued to drive it hard while hot. Let it cool, or drive under 40ish kph.

 

I installed a (from my local dealer) genuine inverter pump earlier last year. In summer there was visible "turbulence" and agitation. Now in winter I can barely tell that the coolant is circulating- but it is.

Whether you have a genuine OE part or a counterfeit, I can't say (amazon might be slightly better than ebay- maybe), the proof is in the inverter temps when under load.

Posted via the PriusChat mobile app.

 

Yes pretty good odds the pump is counterfeit. Chinese got the box down. You must buy the part from a Toyota dealer online I have used Olathe Toyota there great they answer the phone very helpful highly recommend.

I have only bought parts from Olathe over the last 14 years and never experience the nonsense I see on this site.

If Im reading right first change of coolant at 160000 miles is not correct and
Very poor.You may have some blockage.

My car has very aggressive inverter circulation. Coolant looks like it’s boiling.

I changed my coolant every 50000 miles. I usually did it when I changed the trans fluid too.

I also recommend adding a bottle of Redline water wetter it works great. It’s an excellent anti corrosion additive and surface surfactant. Google it.
I run that in the inverter and ice coolant. Inverter temp cooling improved from stock by about 10 degrees.

I also bypassed the coolant loop on the throttle body but I don’t recommend that in cold areas of the world.

 

I think that factory service rate is way off base on the Inverter. If you looked at your inverter coolant in a clear container at just 30,000 miles you would see how contaminated it was with aluminum in solution. Nothing more corrosive than that.

And it cant be cold to the touch no matter what the ambient temperature is. You have no circulation there. The inverter coolant temp runs about 100 degrees cooler than the engine so 80 F is right around where a healthy Inverter coolant loop lives. It does a crazy heat soak when you turn the car off as there in the same radiator though. Like a 50+ degree increase in heat temporarily. Toyota engineers saw that so they made the ice coolant and Inverter coolant separate rads in subsequent gens. They probably had to with the increased power of the electric motors.
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I have done alot of testing with an IR thermometer.

And If you bought a pump from Amazon its probably junk. Hence your result.

 

When I change the coolant pump on the '09 with a junkie $24 pump from Amazon or eBay or somewhere these pumps like I said before very similar and made just like the ones on some of my water-cooled power sports equipment Very simple no shaft penetrates the plastic impeller similar to a washing machine drain pump and when I replace the pump and put the new one on I see movement but it is not anything horrendous loud or any gigantic move of water by any stretch of the imagination just by the outlet and inlet size and the impeller size of the pump itself pretty small so I wasn't expecting to see water moving like gangbusters and then now with the new pump and a good rundown the road all the tubes are reasonably warm about 80 or 95° like you said and that's that when that crappy shitty non Toyota pump fails power replace it with another it goes too fast to pay much over 50 or 60 bucks for them

SM-A715F ?