I had posted about noise that only present while at car is at idle and engine temp is close to its operating temp.
As soon as i press gas pedal (rpms go up) noise completely goes away.

Have any one encountered some thing similar?

Click link to see video:
http://s157.photobucket.com/albums/t...t=HPIM6518.mp4

 

It is a bearing on something.
Remove the serpentine belt and then start the truck.
Noise gone?
Shut the engine off and start spinning everything by hand, ALL pullies, alternator, tensioner, water pump, everything.
Spin them as fast as you can and you will fine it.

 

mine is the water pump. it's only about a year and a half old. can i just get bearings for this

 

i dont think so^

mine was tensioner pully, 18$ at auto zone. same symptoms, good way to check is spray it with wd-40 at the bearing if its gone thats your problem

 

Is that $18 for the tensioner pulley, or the whole tensioner assembly?

edit: Never mind, I went to Autozone and it is just the pulley.

 

Where did you get your water pump and what brand is it?

 

i'm embarrassed to say i don't know the brand. i got it done the day i bought the truck by a local mechanic. i do most of my own work now. he doesn't remember where he got it. this time i'll do the work and get the part myself.

 

I have heard that the Proline water pumps are junk but I cannot confirm that.