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Valve lash inspection / adjustment on 4.0 V6?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Apex1, Dec 4, 2018.

  1. Dec 4, 2018 at 7:36 PM
    #21
    Jimmyh

    Jimmyh Well-Known Member

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    inwood customs likes this.
  2. Dec 4, 2018 at 8:38 PM
    #22
    b_r_o

    b_r_o You're gonna have to speak up, I'm wearing a towel

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  3. Dec 4, 2018 at 8:51 PM
    #23
    perryp

    perryp Well-Known Member

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    It makes me laugh when I read posts like this because of a proposed noise..
    Someone earlier in the thread did mention injector noise.
    Cold weather = more noise pure and simple regarless of engine type.

    Simple solution 1 )...use a high viscosity oil...perhaps a 10W30..
    Use a full synthetic like Mobile1, or Penzoil....these oils have very good cleaning properties as well.
    Use an OEM Toyota oil filter...cannot go wrong with these...

    And then re-evaluate the noise situation.

    Also, as others have mentionned,....rev the engine to 3 or 4000 rpm ocassionaly,...valves accumulate carbon etc...leading to noises...
     
  4. Dec 4, 2018 at 9:00 PM
    #24
    Jimmyh

    Jimmyh Well-Known Member

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    I've driven the crap out of a lot of Toyota vehicles in my life. I bought the first a 1966 Corona and since then there have been many and Never had to adjust valves.

    Not mine, but the 1966 Corona looks like this:

    [​IMG]
     
    rjbiii and b_r_o like this.
  5. Dec 4, 2018 at 9:25 PM
    #25
    b_r_o

    b_r_o You're gonna have to speak up, I'm wearing a towel

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    I've had a few 90s 4wd trucks, an 87 supra and an 88 cressida that was pretty cool. I drove the cressida for a few yrs and it was fine until I loaned it to my buddy for a couple weeks. He gave it back running on 5 cylinders with a pretty heavy valve train noise.:annoyed:
    Never got the time to dig into it but looking back it was probably a dropped valve guide or seat
     
  6. Dec 4, 2018 at 9:37 PM
    #26
    perryp

    perryp Well-Known Member

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    What an ugly car...Oh my God!
    And it was probably made from recycled beer cans to boot!

    Wait, Wait...did you say you never adjusted the valves on a 1966 car????:curls:
    I was(we were) sidetracked by the look versus the quality....WAY...WAY before Toyota had the present product quality reputation...
    Or was that part of the long term marketing strategy?
    Make it simple, make it good,..price it right,...market the product as such...(rabbit and turtle race!)...

    My opinion is that Toyota make decent cars...call them good at best..
    The rest just make flashy junk that sells to the average housewife that likes it,...cause it comes in pink or turquoise...
    AND the rest of the car MFG's,...count on the marketing bullshit..to sell to the masses.
    Toyota saw clear,...

    Some of us cannot be fooled...all the time..

    Kudo's to Toyota to see the long term vision on this...

    The rest,...well keep buying Chryslers..etc..:facepalm:
     
  7. Dec 4, 2018 at 9:55 PM
    #27
    Jimmyh

    Jimmyh Well-Known Member

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    That car was a beast. I beat that car harder than any vehicle I have ever owned and it never quit on me. It was ugly but dedicated!
     
  8. Dec 6, 2018 at 7:06 AM
    #28
    Spencedaddy

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    What about someone, such as myself, that has 250,000 miles? I am looking to do some maintenance needed at high mileage and thought the valve train would be good to check/ adjust.
     
  9. Dec 6, 2018 at 8:52 AM
    #29
    wheeliest

    wheeliest NOT A SENSITIVE PUSS

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  10. Dec 6, 2018 at 8:59 PM
    #30
    Jimmyh

    Jimmyh Well-Known Member

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    If it is working and not causing an issue I would leave it alone.
     
  11. Dec 6, 2018 at 10:30 PM
    #31
    Master Z

    Master Z Well-Known Member

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    If you want the correct method on how to check and adjust valve clearances, get yourself a 2 day subscription to TIS($20). Print out the procedure and have at it.
     
    blu92in99 likes this.
  12. Dec 7, 2018 at 3:18 PM
    #32
    Jimmyh

    Jimmyh Well-Known Member

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    Just stating my experience with Toyota's.

    I have never seen a valve head get pulled off of a valve on a engine. What happens with wear is that the valve lash gets tighter. I have a feeling that the spring that closes the valve is not going to pull the valve head off the stem. That is a ridiculous notion.
     
  13. Dec 7, 2018 at 3:21 PM
    #33
    wheeliest

    wheeliest NOT A SENSITIVE PUSS

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    Thats great, The way it works though is, the "Lash" gets tighter right? so that means that the valve eventually ends up losing "Lash space" aka Clearance, if this happens, the valve gets held open or to the point that it doesn't seal completely... Now what happens to a valve that doesn't seal? It burns up, the valve needs to touch the valve seat in order to dissipate heat. now when a valve burns up, it stretchs (heavy end is in the cylinder and gravity is pullin on it) crazy right? now said person gets an issue, trucks having trouble starting.. well sir some ur valves are out of spec.. ok adjust them.. valves get adjusted and now they are back in contact with valve seat... Crazy right? now the the valve is fatigued and stretched guess what happens?

    I build performance engines... I work in Aerospace/Industrial automotive quality.. I beat the living shit out of motors.. in ARIZONA HEAT.. you're experience doesn't pay for a dudes motor who takes your kiddy table advice.. theres a seat at the adult table and hopefully anyone who questions valve adjustments doesn't follow your advice..
     
    Last edited: Dec 10, 2018 at 7:32 AM
  14. Dec 7, 2018 at 3:43 PM
    #34
    Jimmyh

    Jimmyh Well-Known Member

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    My point is you will know you have an issue long before the head gets pulled off of a valve stem. That is just too funny. Keep wasting your time checking your valve clearance every 60K however.

    Maybe your issue is you beat the living shit out of motors....

    How many valve heads have you seen get pulled off the valve stem on a daily driver?

    I'm done. You are entitled to your opinion.
     
  15. Dec 7, 2018 at 3:47 PM
    #35
    wheeliest

    wheeliest NOT A SENSITIVE PUSS

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    NO SWAYBAR, Spacer lift with dirty4's
    Typically the valve face gets deformed.. and it's not an opinion its facts. Sorry you dont know what you are talking about
     

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