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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 07-02-2011
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chirp noise VIDEO

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

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Old 07-02-2011
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cam syncro probably
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Old 07-02-2011
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Quote:
Originally Posted by 99offroadrngr View Post
cam syncro probably
do 4.0s have cam syncros?
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Old 07-02-2011
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crank angle sensor/cam synch i don't remember exactly
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Old 07-02-2011
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We have a cmp and ckp Idk about a syncro
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Old 07-02-2011
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4.0 SOHC do not have cam synchros.
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Old 07-03-2011
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One of my gf friends a guy thinks its my waterpump.
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Old 07-03-2011
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Legit Im giving up on it
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Old 07-03-2011
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Harmonic balancer/crankpully? Easy way to figure it out...

http://www.explorerforum.com/forums/...d.php?t=302068
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Old 07-03-2011
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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.
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Old 07-03-2011
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I will do what you said I do have a scope ill take the belt off and check the pulley
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