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2gen engine knocking?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by raskal311, Mar 22, 2010.

  1. Mar 22, 2010 at 9:24 AM
    #1
    raskal311

    raskal311 [OP] Well-Known Member

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    In the past few weeks I have noticed a really loud knocking sound from the engine during cold start early in the morning. I’m thinking about taking it to the dealer to look at but I’m worried they would just tell me to spend $600 on a 60k tune-up; I’m at 54k now. The knocking seems go away after the engine warms up properly.

    Is this normal or should I have it looked at? This is a loud knocking sound not the Toyota tick.
     
  2. Mar 22, 2010 at 9:27 AM
    #2
    RainDodger

    RainDodger YGWYPF

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    Can't diagnose a text description. Have someone listen to it. a "tune-up" won't fix an actual knock. Better safe than sorry....
     
  3. Mar 22, 2010 at 9:29 AM
    #3
    TacoSupreem

    TacoSupreem Dirty Trucker

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    Are you using premium fuel?
     
  4. Mar 22, 2010 at 9:37 AM
    #4
    raskal311

    raskal311 [OP] Well-Known Member

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    89 normally. I've been using 89 since 10k, and before that I was using 91; never had this problem before.
     
  5. Mar 22, 2010 at 9:42 AM
    #5
    TacoSupreem

    TacoSupreem Dirty Trucker

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    Hmm idk hopefully someonewill chime in that will know? I would take it to the dealer b4 your warranty expires.
     
  6. Mar 22, 2010 at 9:46 AM
    #6
    jimker55

    jimker55 Well-Known Member

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    my truck just started doing the same thing. it sounds like a plastic knock of some sort. I took it to the dealer and there is a TSB on it. its the snorkel vibrating in the fender. The part cost $100 so I decided not to fix it just yet. There have been people here that have just tightened it and replace the weather strip where it enters the fender.

    http://www.tacomaworld.com/forum/2n...bration-noise-factory-air-intake-snorkel.html
     
  7. Mar 22, 2010 at 9:47 AM
    #7
    FuTang909Inamo

    FuTang909Inamo Well-Known Member

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    Is it like pinging/detonation knocking or more like a rod, lower engine knocking? You said it goes away after it warms up? What oil do you use and what viscosity?
     
  8. Mar 22, 2010 at 10:05 AM
    #8
    raskal311

    raskal311 [OP] Well-Known Member

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    The sound is coming from the engine.

    I'm not very knowledgeable in engine mechanics but I think its more like a rod knocking. I'm using Toyota 5-30.
     
  9. Mar 22, 2010 at 10:17 AM
    #9
    kulitxplod

    kulitxplod Well-Known Member

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    I'll play.....A engine sound that varies with temperature could be one of many things. What does the oil level look like? How long ago was your last oil change? What operating temperature does the engine normal reading with your normal driving? What does your water level look like?

    Diesels and VWs are the only two types of engines I know of that knock and it doesn't mean squat, all other, beware.
     
  10. Mar 22, 2010 at 10:32 AM
    #10
    PreRunner

    PreRunner Well-Known Member

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    fine i'll do it

    what engine do you have?
     
  11. Mar 22, 2010 at 10:52 AM
    #11
    raskal311

    raskal311 [OP] Well-Known Member

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    what engine do you have?[/quote]

    4.0 V6 2007 Taco.

    Last oil change was about 1k ago. Level looks fine, maybe a tad high. When checking before warm-up it sits just a smigit above the second notch. Normally the temp gauge sits at or a tag below the middle mark. When you say water level do you mean coolant? If so its full.

    If its a rod problem would the sound go away a few miles of driving.

    I should also point out that I hear the knocking only when the truck is in park.
     
  12. Mar 22, 2010 at 11:54 AM
    #12
    kulitxplod

    kulitxplod Well-Known Member

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    If all fluids are at expected levels, you've taken care of the engine (no hard running, redlines, racing, just plan dogging the truck), I'd say that you have one of two issues that could be wrong. As stated before, it's very difficult to troubleshoot a engine with text, but as described, I'd suggest you take it into the dealer if under warranty and a reputable mechanic if not. This sounds, I'm sorry to say, like either a oil pump about to take a dump or a rod.

    Now I could have suggested that you have a bad piston and it would carry the same weight as the suggestion in the previous paragraph of my post. I say this to give the OP quantification on the analysis. My internet diagnosis is nothing compared to what a good quality mechanic can do for you, because he/she will have the truck in hand to diagnose. But, I, along with many others here, have turned plenty of wrenches on vehicles, each of us probably has a different take on what or what not to suggest as the culprit, so you'll probably get all kinds of answers. Good luck and keep us posted.

    I missed something. Yes! Yes, the sound would "appear" to go away after driving if it was a rod. You'd probably notice it more pronounced in an idle that at 2000 RPM going down the road. At least in my experience, can't account for others.
     
  13. Mar 22, 2010 at 12:04 PM
    #13
    Creemore

    Creemore Well-Known Member

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    +1.

    Detonation would be more likely to occur under load and less at idle, and would often be less pronounced when cold because the ECU would have the engine running on the rich side.

    A noise that is there cold and not warm is a moving part.
     
  14. Mar 22, 2010 at 1:57 PM
    #14
    raskal311

    raskal311 [OP] Well-Known Member

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    One last thing, if it was the rod should I feel a lost of power?
     
  15. Mar 22, 2010 at 4:38 PM
    #15
    kulitxplod

    kulitxplod Well-Known Member

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    if it's a rod, you don't want to push it to find out. a knocking rod, if this is the case, will come out of that engine block like snot during a good sneeze....one way....hard and fast.....i speak from experience of throwing a rod or two....don't let it happen to you...if you suspect it, have the engine looked to by a professional and reputable shop.
     
  16. Mar 22, 2010 at 5:04 PM
    #16
    raskal311

    raskal311 [OP] Well-Known Member

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    I ask because the truck drives perfectly fine even at high rpm.
     
  17. Mar 22, 2010 at 6:28 PM
    #17
    Reaper22

    Reaper22 Well-Known Member

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    My 99 2.7 done it when it was extreamly cold and so does my 06, after about 5 seconds or so it stops, years ago I was told it was normal of the 2.7's to do this when very cold, my 99 done it when I got it at 52000 and was still strong at 106000 and got no worse when toyota bought it back. I always start my truck up 15 min before I drive it when very cold..
    BTW even a friend who has a 2.7 does it as well..
     
  18. Mar 22, 2010 at 7:18 PM
    #18
    nagelg

    nagelg Well-Known Member

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    If it's a rod going, it will knock when you rev it and let up on the gas a little. If it's a main it'll knock upon acceleration. I find it strange it does it only when the tranny is in 'park'. I suggest you take it to the dealer and see what he says.
     
  19. Mar 23, 2010 at 8:33 AM
    #19
    raskal311

    raskal311 [OP] Well-Known Member

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    All is well!! It looks like the area I park amplified the engine sound a bit and on top of that I have been turning off the radio since it’s so early in the morning so that I don’t wake my roommate.
     
  20. Mar 25, 2010 at 5:23 PM
    #20
    Fienoma

    Fienoma Well-Known Member

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    hmmm i have the same vibration and knocking noise(just started at the beginning of this week) but i have a K&N intake..so i dont think it could be the snorkel...anyone have an idea? i'm hoping its not a bad rod.....i just got an oil change last saturday..so at the moment i'm clueless on what it could be.
     
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