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problems with dough thorley long tubes

Discussion in 'Performance and Tuning' started by kris219, Jan 9, 2010.

  1. Jan 9, 2010 at 3:08 PM
    #1
    kris219

    kris219 [OP] Well-Known Member

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    im trying to convince my dad to let me get dough thorley long tubes for my 4.0. he's old school so he thinks hes gana have to torque the bolts that hold the headers to the block every three months or something. is this true? and when you use the o2 simulator, does the check engine light still work for other stuff?
     
  2. Jan 9, 2010 at 3:10 PM
    #2
    Krazie Sj

    Krazie Sj Resident Jackass

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    If he thinks that then buy some loctite. There's some that formulated for heat.
     
  3. Jan 9, 2010 at 3:35 PM
    #3
    bsfarmer

    bsfarmer Member

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    You might have to tighten a couple of times. Every header or manifold I've put on, the bolts have loosened a couple times before they stay put. You might want to try Stage-8 header bolts, I've heard great things about them.
     
  4. Jan 9, 2010 at 4:40 PM
    #4
    XrunnIT

    XrunnIT Well-Known Member

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    I've never had any issues with mine coming loose. After you torque them down, go out for a spin, let the headers get hot. Come back, let the motor completely cool down, re-tighten the headers, and you should never have to worry about them again.

    the o2 sim only eliminates the CEL for the front cats. All other CELs will still illuminate as they are supposed to.
     
  5. Jan 12, 2010 at 7:12 AM
    #5
    c0astie31

    c0astie31 TACO SUPREME

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    i installed my o2 sim and i was told this is for the rear cats.
     
  6. Jan 12, 2010 at 8:28 AM
    #6
    XrunnIT

    XrunnIT Well-Known Member

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    The o2 sensor monitors the health of the front set of catalytic converters. The rear set of cats are unmonitored. So you only need the o2 sim if you have bypassed the front cats.
     
  7. Jan 12, 2010 at 11:29 AM
    #7
    TacoSupreem

    TacoSupreem Dirty Trucker

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    All the o2 sim. does is tells the computer that the cats are there and functioning properly!
     
  8. Jan 12, 2010 at 11:37 AM
    #8
    Toyota Truck

    Toyota Truck Well-Known Member

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    Why don't you get some of those "Stage 8 locking fasteners" ?
     
  9. Jan 15, 2010 at 5:13 PM
    #9
    RELLIM

    RELLIM Well-Known Member

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    usually u have more problems with taking the bolts loose.
     
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