I have replaced the idler and the tension-er, something is still sqeaking around there. jw if anyone knows a good way to identify what is squeaking, or has come across a similar issue?

99 expedition 5.4 4w

 

Look at the pulleys from the side just in front of the tires while the engine is running. Your looking for any woble in a pulleys. Also you can pull the belt completely off and spin every pulley by hand

 

I had that noise. Bad bearing in the A/C comp. Good luck!

Mike

 

For like $5 at harbor freight u can get a mechanics stethoscope. Works great!

 

ugh great

 

i did spin the pulleys by hand, they all spin smooth. found a motorcraft ac pulley for $59 bucks though

 

could be coming from the belt and not a pulley

 

My power stealing pump pulley was not pressed all the way on the pump

How old is the Waterpump?
How old is the fan clutch if it has one?

 

That's how I find my noises worth their weight in gold

 

yea ive used one in auto class, wish i had one and ill probly pick one up today
orginal water pump, a/c has been replaced ounce but i dont know if they replaced the compressor or just the clutch. and fan clutch is original as well

as far as not coming from the belt it really doesn't like it is, it sound like metal on metal kind of squeek