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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 03-04-2008
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high pitch whine

anyone have any suggestions what would cause a high pitched whine in a 2000 ranger 4x4 4.0 5 speed? thought maybe release bearing but pushing in clutch does nothing... doesn't do it all the time comes and goes...seems to be more frequent when the mercury drops but still even if the truck is warmed ( driving on the highway) the noise doesn't go away.... any help would be appreciated, thanks

Last edited by ringer4x4; 03-04-2008 at 08:22 PM.
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Old 03-04-2008
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mine is doing that to but i have a 2001 4.0l 4x4 auto but it only does it when driving over 40mph could it be the pulley tensioner? any one else wanna help because this noise is driving me crazy
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Old 03-04-2008
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same here, after i get my brakes done ( midas quoted me 1200 to fix them WTF! needless to say doing them myself) this whine is next on the repair list... the tax rebate check we are all expecting is almost definitely going into the ranger! will have to take a look at my tensioner.when midas looked at my truck they noticed my power steering fluid was very dirty could that in some way be related? only other thing i can think of it seems to be coming from my front axles ( left?) hard to say because doesn't do it all the time and when it does for only a few seconds

Last edited by ringer4x4; 03-04-2008 at 08:25 PM.
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Old 03-04-2008
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Mine does this on occasion it seems to do it when its rly cold out and i dont let my truck warm up
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Old 03-04-2008
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supercharger????
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Old 03-05-2008
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i wish! hate problems that are intermittent very hard to diagnoise? can change things thinking u found it only for it to come back!
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Old 03-05-2008
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Mine whines too, has done it ever since I got the rig. I took it in for inspection and the mechanic said it was my pinion bearings in the rear end, thought it might help you all out, if not, at least I tried.
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Old 03-05-2008
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Camshaft synchronizer, mine does the same thing.
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Old 03-05-2008
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Mine only does it when i have my foot on the accelerator
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Old 03-05-2008
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this problem only pertain to the 4x4s? seems doesn't matter if u have standard or automatic ( guess rules out the clutch release bearing?) ohv or sohc... seems either a bad belt tensioner or something in the 4x4? noise seems to be coming from the front of the truck on mine....
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Old 03-05-2008
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Mine is to rare of a occasion to pin point....
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Old 03-05-2008
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mine is when im on the accelerator and it is coming fom the front center of my truck
belt system prolly
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Old 03-06-2008
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apparently a lot of people are having the same issue. I am too. Looks like it does not care about the year of the truck either as mine is a 96. Everytime I hear it, I get out, pop the hood and it is gone. Its making me mad!!!
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Old 03-06-2008
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if someone does figure out what it is this should be stickied or something as this seems to be a common problem regardless of year or trans. anyone with a 3.0 have this problem? fiancees taurus doesn't do this so maybe only occurs in the 4.0 whether ohv or sohc? tensioner easy to inspect and tell if defective? or only can tell if replaced with another to try? ( if its the tensioner)
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Old 03-06-2008
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Quote:
Originally Posted by ringer4x4 View Post
this problem only pertain to the 4x4s? seems doesn't matter if u have standard or automatic ( guess rules out the clutch release bearing?) ohv or sohc... seems either a bad belt tensioner or something in the 4x4? noise seems to be coming from the front of the truck on mine....
No, Ive sold so many of those synchronizers I cant keep em on the shelf. Most ppl think it has somethin to do with the belt/pully system, but from my experience with all the shops around here, on 3.0 and 4.0 OHV and SOHC engines, 9 times outta 10 its the camshaft synchronizer, located in the rear passenger side of the engine.
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Old 03-06-2008
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Quote:
Originally Posted by Ace View Post
Mine only does it when i have my foot on the accelerator
Yours is probably the Pinion Bearings in the rear end, Mine does it only when I'm on the accelerator and thats what my mechanic told me it was.
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Old 03-06-2008
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Iac
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Old 03-06-2008
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Quote:
Originally Posted by 4x4offroad99 View Post
No, Ive sold so many of those synchronizers I cant keep em on the shelf. Most ppl think it has somethin to do with the belt/pully system, but from my experience with all the shops around here, on 3.0 and 4.0 OHV and SOHC engines, 9 times outta 10 its the camshaft synchronizer, located in the rear passenger side of the engine.
how difficult/ expensive to change a cam synchronizer on a 4.0 ohv? aren't the 4.o ohvs old school technology ...camshaft in block and thus no cam sychronizer? not doubting u just have never seen inside a 4.0...ohv or sohc ...closest part i can find in a 4.0 ohv is the cam tensioner

Last edited by ringer4x4; 03-06-2008 at 07:25 PM.
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Old 03-06-2008
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Quote:
Originally Posted by D. View Post
Iac
expensive for a 4.0 ohv?
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Old 03-06-2008
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had it in the shop the other day and they said it wasnt the camshaft synchronizer
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Old 03-07-2008
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someone school me, what is a camshaft sychronizer?
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Old 03-07-2008
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mine was doing that too. it turned out to be the power stearing, i got it flushed a few times and it went away
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Old 03-07-2008
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Maybe a vacuum leak as well?
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  #24  
Old 03-07-2008
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Quote:
Originally Posted by D. View Post
Iac
Iac's dont whine like he is describing.
Camshaft synchronizers, well the easiest way I can explain it is that its like a distrubitor, it tells the pcm what position the camshaft is thus telling the coil pack to send fire to the right cylinder at any given time.
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Old 03-07-2008
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nope not the vacum lines i just replaced em and it still does it
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