So i have been chasing this for a few weeks. replaced all my pullies and tentioner. still nothing. i really can not find it. Bugging the crap out of me. need some pointers

 

cam syncro probably

 

do 4.0s have cam syncros?

 

crank angle sensor/cam synch i don't remember exactly

 

Wirelessly posted

We have a cmp and ckp Idk about a syncro

 

4.0 SOHC do not have cam synchros.

 

Wirelessly posted

One of my gf friends a guy thinks its my waterpump.

 

Wirelessly posted

Legit Im giving up on it

 

Harmonic balancer/crankpully? Easy way to figure it out...

http://www.explorerforum.com/forums/...d.php?t=302068

 

Sounds like a Water Pump Bearing.
When you had it apart for the Tensioners did you look try moving the Water Pump Pulley, might have given you a better idea if it was the problem.

Check the bearings in the water pump and/or the power steering pump.
Don’t know much about the Cam Synchros so I can’t go there.

Do you have a auto mechanic’s Stethoscope, if not a long Screwdriver will do.
While the engine is running, put the end on the bearing portion of the Water Pump and the Pwr Steering Pump and see if you hear the noise louder at either point.
BE VERY CAREFUL OF THE FAN AND OTHER MOVING PARTS WHEN STICKING IN THE SCREWDRIVER.

Another thought, r u leaking anti-freeze on the ground, if so check the water pump for a leak under the bearing area, if so then bad pump.

 

Wirelessly posted

I will do what you said I do have a scope ill take the belt off and check the pulley