Whistling sound comes from engine

Watched it. It's the same as mine, this whine has been posted many times. It's normal. Same for el converters

 

Sounds like the interver, louder than usual. I was thinking a quieter whistle but that's way louder than mine and most gen 3 I've test driven

 

my car is almost 190k miles I have the same problem . Please keep the post updated.

 

I have 2013 Prius with 220k and I 've been hearing the same loud whistling from the engine. it started around 180k and it wasn't that loud when it first started. I thought it might be the pump and today I decided to change it myself. I was able to replace the pump without removing the inverter. I just lifted the inverter put a piece of wood underneath just like someone else from another post. After that, everything was normal the sound was gone. I drove the car for about half a mile for a quick tour nope no noise or nothing. then I park the car opened the hood and I opened the inverter coolant lid just to see if there is any movement in the coolant. there was no movement. (by the way, I've never seen the coolant moving ever, not with the old pump neither with the new one) Then something strange happened. I heard a puffing noise sounded like a pressured air leaked instantly from somewhere it shook the engine a little bit too. it was the same time me opening the lid and the sound came right then. I don't know what it was. And then the noise was back the car started whistling again just like before. Tomorrow I m going to check the fuse box to see if anything wrong there. I will try to figure out why the pump is not moving the coolant. I will keep posting.

 

did you ever find a remedy for your whistling problem? My Prius has just started doing the same thing. Thanks!

 

Did you figure out what the issue was since my car started doing it aswell? just 96.000km Gen 3