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2006 4.7L Engine Noise

Discussion in '1st Gen Tundras (2000-2006)' started by interceptor84, Mar 8, 2018.

  1. Mar 8, 2018 at 5:17 AM
    #1
    interceptor84

    interceptor84 [OP] New Member

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    I'm hearing a noise in engine after it warms up that sounds like a rattle/tapping noise, but seems be coming from front of engine. Any ideas? Video linked below.

    https://youtu.be/LOP7zwjzVBA
     
  2. Mar 9, 2018 at 4:57 AM
    #2
    zombie

    zombie New Member

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    I notice videos always pick up the lifters making noise, but with the human ear they sound fine. I hear another noise in there, sounds like a timing belt flapping around, hitting the plastic cover.
     
    Filthyphil likes this.
  3. Mar 26, 2018 at 7:17 PM
    #3
    mooney

    mooney New Member

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    Funny you posted this, I just registered with this site to ask the same question. Mine doesn't seem to be as pronounced - more like a faint rattling sound - but I used the old hose trick to pinpoint the noise, and it's coming from under the front of the driver's side valve cover. I'm suspecting something to do with the VVT system.

    If you're not familiar with the hose trick, cut a short piece of garden hose (1.5 or 2 ft long) and hold one end up to your ear while you move the other end around the engine bay, touching various components. When you find the area the noise is coming from, it will be very pronounced through the hose.

    Give that a try and let's see if we have the same problem...
     
    tacoguybill likes this.
  4. Mar 27, 2018 at 5:27 AM
    #4
    zombie

    zombie New Member

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    I have a stethoscope hooked to a hose, talking small fuel line size. I have another piece of hose taped to a coat hanger so I can aim and get into tight places. There is really no other way to pinpoint a noise except standing there scratching your head.
     
  5. Mar 27, 2018 at 5:43 AM
    #5
    interceptor84

    interceptor84 [OP] New Member

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    I ended up buying an automotive stethoscope. The noise is most prominent on the flange that goes into the water pump. Im fairly certain at this point the scrapping/rattle noise is a bad water pump bearing. Doing a whole timing and water pump kit next weekend.
     
  6. Mar 29, 2018 at 4:36 AM
    #6
    zombie

    zombie New Member

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    I listened again, and that's what it sounds like.......does the fan have any movement? I use Aisin water pumps, and Gates belts
     
  7. Mar 29, 2018 at 4:50 AM
    #7
    interceptor84

    interceptor84 [OP] New Member

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    I ran it a week ago for a few minutes without the drive belt to rule out fan and idler pully as the source of the noise. It still made the sound which further solidified my thought that its the water pump. I picked up a gates water pump and timing kit. It has all the components to do the job right.
     
  8. Mar 29, 2018 at 5:08 AM
    #8
    zombie

    zombie New Member

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    Nothing wrong with Gates pumps, I use those if I can't find Aisin. Sounds like your on the right track.....when you get down to the belt, you can always run it again before taking the belt off to make sure. Most likely your problem. I did read something about an air pump noise on the second gens, so keep that in mind just in case.
     
  9. Mar 29, 2018 at 5:12 AM
    #9
    interceptor84

    interceptor84 [OP] New Member

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    Will do, thanks!
     
  10. Apr 25, 2018 at 6:05 AM
    #10
    interceptor84

    interceptor84 [OP] New Member

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    Just an update on this. Put the new waterpump and timing belt in Noise gone! The old pump had more play than a playground in it.
     

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