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cold start knock

Discussion in 'New Members' started by gman47, Feb 1, 2011.

  1. Feb 1, 2011 at 3:37 PM
    #1
    gman47

    gman47 [OP] New Member

    Joined:
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    Granbury
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    tacoma trd
    I have a 2003 tacoma prerunner trd. I have a engine knock ( sounds like rod knock ) when i start my truck when its cold and only when it sits over night, it only does it once a day, i can start it and go to work and 11 hours later wont knock on start up. only does it over night and cold out side. it is a loud knock. I have been reading some of the threads on this site , it is not a rattle from air tube or a pully. it sounds like the lower end of engine.
    the 3.4L runs great, I never had this noise before. i bought my truck new and it started this when it hit 79,000 miles. Any thoughts on where to look ?
     
  2. Feb 1, 2011 at 3:44 PM
    #2
    JLee

    JLee The Man! Vendor

    Joined:
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    Jerry
    Bay Area NorCal
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    02 Extra cab SAS Linked front and rear
    I lost track thousands of dollars ago.
    Sticking lifter maybe :notsure:
     
  3. Feb 2, 2011 at 4:50 AM
    #3
    gman47

    gman47 [OP] New Member

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    No, Not the lifter's , it sounds like a rod knock, deeper tone than a lifter.
    I put in my garage yesturday becuase of the snow and ice we were getting , I still had ice on my truck in the garage and started it and really
    didnt do it that much, this time barely heard it, But like i said, it doesnt do it when its warm out,

    My head hurts from scratching it so hard !!!:eek:
     
  4. Feb 9, 2011 at 10:12 PM
    #4
    cottonbroker

    cottonbroker Member

    Joined:
    Jan 4, 2007
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    Indiana
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    TRD extended cab
    Mine just started his winter and I have 230k on it I switched to 5w30 right before it started. It sounds like it coming from a passenger side cylinder and my CEL came on the other day and I've read where someone replaced a coil pack and the sounds stopped. If that will work I think what might be happening is we're getting a week spark on a cylinder from the coil pack and it not creating the needed compression and the piston is tapping. Mine sounds like a woodpecker. When I stopped in teh repair shop the retired owner was walking in and I said EDGAR is it bad when your engine sounds like there is a woodpecker in it?he said Doesn't sound good...paused and said "and it not even woodpecker season yet"
    I'm going to buy a coil tomorrow and replace it on cylinder 3 and see if it helps.
     
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