Inverter Pump Airbubbles

What about the other part of the cooling system, maybe that's the problem and your inverter pump circuit is fine?

The heater core is closest to you when you're in the car. Also when the engine is cold and you remove the plastic cover and remove the radiator cap is it full? If not, top it off... Keep doing this only when system is cold and I bet your noise goes away. If not there's additional steps you can take to bleed other parts of the cooling system.

 

I'm I'm not understanding why everybody has to bleed the inverter circuit once you change the pump and you dump cooling out on the ground or you captured into a container and then you put the hoses back on and everything's just sitting there and the jug is empty if you feel the jug up and you wait you will see the coolant you poured in the jug start to disappear as it drops down the hoses through the pump without it being on and goes through the inverter down through the pump through the lower hose over there to the side of the radiator it goes to cool after it does that now ready the car it'll even go down some more you don't need to bleed anything you just add a little more slowly to the jug while the car is in ready mode in the pump is running and it will all level out in just a couple seconds this is not should be an all afternoon affair. It almost does it all for you what you don't want to do is be putting the cap back on. Until you're finished with the operation because it will fool you you'll think you're done and nothing else is happening and go for a drive and then that coolant level will be way down so leave the cap off while you're doing all this and don't get in a hurry to put it back on Wait till you're sitting at the level line for minutes and then you should be done

 

There are lots of "ups and downs" in the inverter cooling system. These high and low spots can trap pockets of air that can prevent the pump from working much at all, or can let some areas get too hot.

The bleeder is an easy way to remove the air.

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I'm I'm not understanding why everybody has to bleed the inverter circuit once you change the pump

Because there's right ways to do things?

 

I'm having trouble following which cooling system you are worried about here.

There are two separate cooling systems. They don't have any connections or anything to do with each other.

The inverter pump is part of one of them, but pretty much everything else you have mentioned here (CHS pump, water pump, heater core) belongs to the other system.

Because there are four (4) (!) water pumps under the hood of a Gen 2 (the belt-driven one for the engine, the one for the heater, the one for CHS, and the one for the inverter) it's pretty important to be precise when talking about them.

The first three of those all belong to the engine cooling system; only the last one has to do with inverter cooling.

 

For the radiator, just fill it up to the top of the neck each morning, and fill the overflow tank to the middle. I marked my overflow tank with a sharpie so it would be easier to read. That will work the bubbles out of the system over a few days. (Note: I had previously used the "short the relay with an ammeter" trick to get the bubbles out of that section of the system.)