When my car warms up to the first notch after 160 I hear a very loud squeal then sometimes it flutters and goes away. It doesn't always do it so it's hard to check it. When I did the other night it sounded to becoming from inside the engine, not a belt. And when i shtut off the car about 1-2 seconds after the belts stop moving you can hear something squeal to a stop even when it wasn't squealing with the engine running. WTF??? It started when I changed out my intake manifold, T/B, did a T/B coolant bypass, and replaced a few pushrods that were bent. It won't do it when I want to check it out to see what exactly it is.

UPDATE>>
Sorry been out of town. Figured out that when I unplug the valve cover vent tube from the throttle body the sound stops instantly.(the tube that goes to the passenger side upper part of the T/B, and runs to the passenger side valve cover) When I plug it back in it starts again after about 2 seconds. The wierd thing is when I unplug it the tube that goes to the valve cover is sucking in and the tube off the T/B is scking in so they are fighting each other. The sucking on the valve cover tube stops after a few seconds of being unpluged. What's the deal here, there is a problem somewhere. For the moment I have it unpluged and the tube on the T/B blocked off, car runs smoother and has 0 squeal. I'm lost.

 

haha. I wouldn't want a blower that sounded like this.

 

maybe its some wierd hidden blower

 

lol just a thought

 

check your idler pulley

 

what you are hearing is the fan still spinning after the engine stops. sounds like a hamster in a wheel and comes to a slow stop, you look and your like WTF the engine is dead, no pulleys are moving, what could it be...

 

Read update in first post, anyone have any ideas?

 

Anybody have any idea. I know it's not a belt.