2004 prerunner chirping under the hood
When the motor is idling it is quiet. But when put
into gear it chirps and when the a/c is turned on it is
louder. Sprayed wd40 on the belts and no change.
My bet is one of the pulleys, the bearing is worn. Remove the serpentine belt and spin the pulleys by hand with the engine off.
I will do that. Thank you!
Someone thought it might be harmonic balancer separating. I didnt think so though because theres no vibrations