Gosh Darn you LS1!! The Front Seal

Discussion in 'High Tech Retrofits' started by sbca96, Jan 26, 2013.

  1. Leonards78LT

    Leonards78LT Veteran Member Lifetime Gold Member

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    How true.
    Even though the techniques and methods have improved, you cannot break the laws of physics.
    In iron block form, the Gen III is a damn good engine, that an iron block version in the 4th gens would not have made that much on a difference in the weight on the front end, something they could compensate with a different spring rate and shocks.
     
  2. 71RS/SS396

    71RS/SS396 Veteran Member

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    I guess if you consider 100 lbs not that great of a difference then OK but that makes a big difference in the balance of a car.
     
  3. Leonards78LT

    Leonards78LT Veteran Member Lifetime Gold Member

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    It is if you don't balance out the suspension to compensate for it :rolleyes: You should know that.
     
  4. sbca96

    sbca96 Veteran Member

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    Guys ... come on! The 4th Gen HAD an iron block LT1 from 93-97, the LS found
    its way into the 4th Gen in 1998. Granted the LT1 is lighter than a LS iron block
    with aluminum heads, that is only about 30 pounds. The replacement shocks for
    the 4th Gen are 1993-2002 and I haven't seen any separation in aftermarket for
    spring listing either. I would assume that this weight difference wasnt enough to
    make any real difference in handling. As far as brakes the later 4th Gens got the
    bigger 2 piston ones. If I dropped Leonard's iron block LS6 into my wife's 1999 I
    don't think the car would even notice the change.

    It has Bilsteins all around, Hotchkis suspension and subframe conns, Eibach front
    springs and 1995 Z28 rear springs (the Eibach rears were sagging).

    Tom
     
  5. 71RS/SS396

    71RS/SS396 Veteran Member

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    Tom, it would add 100 lbs to the front of the car.
    I have weighed the iron 6.0 block (210 #) and the LS7 Block (107 #) myself on our digital shipping scale to verify the weight. I don't use the small bore LS engines so I've never weighed them but I doubt there's more than a few pounds difference compared to the LS7.
     
  6. sbca96

    sbca96 Veteran Member

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    Add vs LT1? or the LS1? Whats difference to LT1? Thats your benchmark.
    Anything too much heavier than the LT1 and you might see issues develop.

    I believe the weights I have read before. Iron block LS with aluminum heads
    is about 30 pounds more than an LT1. I doubt that would be noticeable.;)

    Tom
     
  7. 71RS/SS396

    71RS/SS396 Veteran Member

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    I've never weighed an LT1 so I can't say what the difference is.
     
  8. sbca96

    sbca96 Veteran Member

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    This task is complete, I am happy to report.

    The Haynes manual stated that you needed to measure the depth of the front
    seal and match that depth, but as the picture below shows, the flange dictates.

    [​IMG]

    Here you can see the Exxon Valdez ... I mean ... 1999 Camaro LS1. The holder
    tool was critical in doing this right.

    [​IMG]

    [​IMG]

    I laid out the 140 degrees in AutoCAD and transferred the angle to the bolt.

    [​IMG]

    [​IMG]

    The original bolt showed no signs of loctite, so I didnt use it either.

    [​IMG]

    I torqued the bolt to 37 ft lbs.

    [​IMG]

    Then I marked the 140 degrees with a small mark to show where I was and a
    larger mark to know what to line up with.

    [​IMG]

    This is how you get 140 degrees.

    [​IMG]

    Done. Now onto the 2004 GTO valley cover.

    [​IMG]

    [​IMG]

    Tom
     
  9. mrvedit

    mrvedit Veteran Member

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    That looks perfectly done. Congrats.
     
  10. Leonards78LT

    Leonards78LT Veteran Member Lifetime Gold Member

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    About time ;)
     

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