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Strange noise from engine

Discussion in '1st Gen. Tacomas (1995-2004)' started by Tacoma1313, Aug 5, 2009.

  1. Aug 5, 2009 at 6:43 PM
    #1
    Tacoma1313

    Tacoma1313 [OP] New Member

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    I have a 2004 4x4 3.4L tacoma, that has had the timing belt changed recently due to a leaky water pump at 36,000 miles. After that was done I noticed a new sound when at 2500 rpm thru 3000 rpm. The noise is a rapid ticking sound that starts quietly at 2500 rpm then gets loudest intermittently at 3,000 rpm then quiets down again after about 3200 rpm. It doesn't seem to show up until the engine is warmed up and I don't have any check engine light, power loss or hesitation when driving. In fact, it seems to run fine.

    My main question is, if valves that are outta adjustment will they chatter throughout the rpm band or can they be intermittent? Also would this be a symptom of the timing belt being put on wrong?

    Thanks.
     
  2. Aug 5, 2009 at 6:46 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Welcome to TW!

    If the timing belt was on "wrong" it wouldnt run well, if at all. It may be the normal ticking you hear from these engines.
     
  3. Aug 5, 2009 at 8:04 PM
    #3
    Tacoma1313

    Tacoma1313 [OP] New Member

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    I've heard of the normal ticking, but isn't that supposed to happen at all rpms?

    Also, I put in an mobil 1 oil filter, and mobil 1 full synth, do you think this could cause the valve tap to be more audible? Someone told me that the toyota oil filters have a drain block that keeps oil in it so it gets to the valves faster when starting the engine, could the mobil oil filter have caused oil starvation enough to cause damage?
     
  4. Aug 5, 2009 at 8:18 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    The ticking happens at intermitent rpms, and seems to differ from truck to truck on where it is most audible.
     
  5. Aug 5, 2009 at 11:05 PM
    #5
    Tacoma1313

    Tacoma1313 [OP] New Member

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    Ok then nothing fatal? I have to drive down to So Cal in a couple of weeks and don't want my baby blowin up on me.

    Thanks for the replies.
     
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