I have a high pitch squeal from inside my 3.0 motor, Thought it was an idler pulley,but when I pulled off the belt, the noise was still there. what could it be. It sounds like its coming from iside the top end??????

 

could be the bearing in the alternator

 

get a 2 foot piece of 5/8 heater hose and put one end to your ear and the other to different parts of the engine........also the iacv has been known to make a squeal

 

What is a iacv? And I will diffinatly try the hose trick!

 

idle air control vlave....it is attached tto the throttle boody and is about 4 inches long by2 inches wide

 

will that get louder when I give it gas?

 

it might........do the hose trick you will locate the noise....

 

Welcome to FTE.

The cam sensor, located on the rear passenger side of the engine block on the 3.0L, is known to make a squeek that changes with rpm when it's bearing is going bad, so it belongs on your suspect list.

 

I say cam sensor.

I had a 3.0 destroy the cam sensor gear and caused the oil pump to seize. I'd take a look at the sensor drive gear and make sure it's in good shape.

My opinion of the 3.0 cam sensor design is that it is a major weak link in the motor and terrible engineering design. The motor was intended to have a distributor where the cam sensor is. If a distributor stops (and oil pump too) the engine stops running. This is NOT the case with the cam sensor. If the cam sensor/oil pump stops turning the motor keeps going and commits suicide.

 

If you come to find it's the cam sensor, these folks don't recommed a Dorman.
Alert! Dorman Cam Synchronizer Assembly! - Taurus Car Club of America

 

My 2000 4.0 ohv engine had the same squeal. If it wasn't for my dealer buds at Tommie Vaughn in Houston I would have lunched the motor. Get it looked at soon.