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Being new to the 4.6, I'm wondering if this diesel sound is normal?

Discussion in 'Stock 2006 -2010 Explorers' started by geosnooker2000, March 5, 2018.

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    1. geosnooker2000

      geosnooker2000 Active Member

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      Sounds like rockers knocking or a diesel engine. Truck is new to me (3 weeks) 120k miles on it, and seems strong and gets good gas mileage (21mpg if I hold my tongue just right) . Does not run hot. Oil level seems correct. It is very faint, but it's definitely there. Am I worrying for nothing? Or is this a known issue that will turn into something?
       
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    3. Explorer_PL

      Explorer_PL Elite Explorer

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      Read about camshaft phasers on 3v engines
       
    4. geosnooker2000

      geosnooker2000 Active Member

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      Just checked out a couple videos on YouTube. Very interesting... Thanks! Any risk in letting it go 'til the summer?
       
    5. Christobal65

      Christobal65 Active Member

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      If you can't replace them now and can deal with a check engine light just unplug both phasers it should help reduce the issue with less risk of a catastrophic failure

       
      Last edited: March 6, 2018
    6. thebrakeman

      thebrakeman Well-Known Member

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      If the noise goes away after 1-2 minutes of warm-up, it's 1 or more broken exhaust manifold studs.
      If noise continues after 1-2 minutes of warm up, see other recommendations.
       
    7. geosnooker2000

      geosnooker2000 Active Member

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      I'm not getting a CEL. Like I said, it is very faint. Most people wouldn't even notice it, but coming from the 5.0L, this engine sounds different. It *MAY* just sound this way. IDK.

      And @ thebreakman -

      This is definitely after warm up. If I had to guess, I would say this must be the very beginning of the phaser problem. When it's not bad enough to throw a code yet. But again... I'm guessing.
       
    8. Christobal65

      Christobal65 Active Member

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      The 5.4 and 4.6 engines have a very different sound (not referring to exhaust note) than the older 302/5.0
       
    9. michael loibl

      michael loibl Active Member

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      Christobal65 is saying you can disconnect the phasers, but then u will get a check engine light. This may help til you can resolve the issue. I did it on a 2006 expedition 5.4 successfully
       

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