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What type of engine?

Discussion in 'The Garage' started by PsychoticDeadGuy, Aug 19, 2005.

  1. PsychoticDeadGuy

    PsychoticDeadGuy 1/2 ton status

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    What type of 5.7 350 do i have in my '87? Gen. 1, 2, or 3?
     
  2. Blazer1970

    Blazer1970 1/2 ton status

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    Gen I. LT1 is gen II, and Gen III is the new LS1, and the 4.8, 5.3 and 6.0 truck motors.
     
  3. Mad-Dog

    Mad-Dog 1/2 ton status

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    1st Generation.... :bow:
     
  4. dirtwarrior17

    dirtwarrior17 Banned

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    gotta love the 1st gens but its hard to argue with aluminum blocks and 6 bolt mains. :bow:
     
  5. ryan22re

    ryan22re 1/2 ton status

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    there is a gen iv now...engine in 05 gto and corvettes...not really much changed, except for the knock sensor location and the lifter valley is redesigned for the 4-6-8 crap.

    ryan
     
  6. gambit420s

    gambit420s 1/2 ton status

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    i know from the choices its 1st gen but it is the 2nd or third design of that block, wouldn't it have passenger side dipstick and one piece rear main seal? maybe even centerbolt heads? Duntov Rocked :saweet: :saweet:
     
  7. Corey 78K5

    Corey 78K5 1 ton status

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    Actually that engine is nothing more than the 5.3 SBC and it is a 4-8 engine not a 4-6-8 engine and is only offerd in the Trailblazer based SUV's and the new front drive V8 powerd midsize cars like the Monte Carlo, Impala and Grand Prix.
     
  8. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Yes, in '86 IIRC Gm went to a one piece main seal and in '87 they went with the center bolt valve covers. Also, I think they started getting provisions to accept roller cams.
     
  9. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    And GenIII all aluminum 5.7 346" found in camaros, corvettes, and t/a's. :wink1:
     
  10. ryan22re

    ryan22re 1/2 ton status

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    so the 6.0 in the corvettes and gtos is actually a 5.3? i dont get it. the 05 6.0s are a gen iv but they dont have the 4-8 (excuse me), but they do have the castings for it.

    ryan
     
  11. Blazer1970

    Blazer1970 1/2 ton status

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    That is the LS1. There are actually a bunch of different RPO versions of the Gen III engine.
     
  12. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    yup. The "LS1" RPO really only applies to the 1997 engine when it first came out. so 98 up 5.7's aren't ls1 rpo's.
    Since then, gen III motors have been generally referred to as LS1 motors.
     
  13. neverendingproject

    neverendingproject 1/2 ton status

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    the '04 corvettes and gtos were 6.0L not 5.3 Gen III motors just have those four displacemants... for now gm is supposedly coming out with a 427 smallblock gen III in '07
     
  14. ryan22re

    ryan22re 1/2 ton status

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    all gen III 5.7's are LS1s or LS6s

    here is the others:
    1998-present Generation 3 small-block pushrod V8 family:
    1998-2004 LS1 - 5.7 L V8
    2001-2004 LS6 - High-output LS1
    LR4 Vortec 4800 - 4.8 L
    L33 Vortec 5300 - 5.3 L
    LM4 Vortec 5300 - 5.3 L
    LM7 Vortec 5300 - 5.3 L
    LQ4 Vortec 6000 - 6.0 L
    LQ9 Vortec HO 6000 - High-output 6.0 L
    2005-present Generation 4 small-block pushrod V8 family:
    2005-present LS2 - 6.0 L
    LS4 - 5.3 L Pontiac
    2005-present LS7 7.0 L High-performance Gen IV engine

    ryan
     

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