I have fully drained the engine and inverter coolant , but I have accidentally filled with HOAT or so called G12++ fluid instead of an OAT one. Now I found out that the prius does not like the silicate present in HOAT. I have driven 2 years with it without troubles, but I would like to correct this now. Question: Can I just drain the wrong fluid and fill up with the proper one or do I have to perform a flush?
Nope you can drain it add a little of the proper fluid let it push out all the old fluid fill it with the right stuff and forget about it.
I have replaced the coolant with OAT as instructed. I understand that HOAT doesn't protect copper, brass and lead, so is our cooling cirquit made of that material? I think the ICE and its radiator are completely made of aluminium, but what about the inverter?
Most all water in this system passes through aluminum predominantly there may be some other metals in the thermostat itself but it's pretty small. The passage through the inverter is through an aluminum block which is the whole body of the inverter The water doesn't pass through or touch any of the copper parts in that inverter It just draws the temperature away. I think you'll be okay I do know people who have put crappy coolant in the vehicle and the run it well past 300,000 without any problems yeah seriously I even know people that have transmission fluid that would never fly like from regular CVTs I'm not sure what bottle they even used but it's not approved for running an electric motors and as far as I know the cars are still on the road but I wouldn't say it's a good practice.
