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Valve adjustment necessary?

Discussion in 'Technical Chat' started by Terminous, Oct 20, 2011.

  1. Oct 20, 2011 at 1:18 PM
    #1
    Terminous

    Terminous [OP] Member

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    Hello all. I now have 128k on my '05 Tacoma Pre runner with the 1GR-FE. I spin a wrench for a living (diesel truck) and know the importance of well adjusted valves in regards to performance, fuel economy and valve train wear. I have looked all through my maintance manual and found nothing on recommend valve adjustment intervals. I do have some valve train noise (ticking) but have been told by the dealer while under warranty that it is normal noise. The performance is a little sluggish lately, and yes, I have changed the plugs recently.
    Has anyone found an adjustment to be necessary and if so does this engine use valve shims to obtain correct clearance or is it a straight adjuster and lock nut affair? Thanks in advance for your help in this!




































     
  2. Oct 20, 2011 at 2:00 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Its a shim under bucket design, but I havent seen them out of spec after 200+ k miles..
     
  3. Oct 20, 2011 at 2:06 PM
    #3
    Texoma

    Texoma Well-Known Member

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    Unless someting is wrong, or it is running rough, no adjustment necessary.
     
  4. Oct 20, 2011 at 2:06 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    A friend of mine had 580k miles when he had his done...and they werent that far out of specs....
     
  5. Oct 20, 2011 at 4:19 PM
    #5
    David K

    David K Well-Known Member

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    Are they not "self-adjusting" ??
     
  6. Oct 20, 2011 at 4:19 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    No.
     
  7. Oct 20, 2011 at 11:13 PM
    #7
    Terminous

    Terminous [OP] Member

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    Thanks for your input guys, sounds like i'll leave 'em alone unless they develop a firm need to be adjusted.
     
  8. Oct 22, 2011 at 2:16 AM
    #8
    qnyla

    qnyla Well-Known Member

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    My 2006 is at 256k and I have yet to see a need to adjust them.
     
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