1993 350 5.7 truck engine CORE Question

Discussion in 'Troubleshooting & Diagnosis' started by Lou6t4gto, Nov 14, 2019.

  1. Lou6t4gto

    Lou6t4gto Veteran Member

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    I've been tearing down engines for 50 years (all kinds) maybe my memory is getting bad but, this engine #14093638,(dished pistons, 193 heads, Flat tappet hydraulic, 1 piece rear main). the "LIFTERS" are about 3/8" down in the lifter bore, they come up to almost level when the Valves OPEN. Aren't they "normally" at the Top of the bore and come Out of the bore when the valve is open in an older sbc ??? OR are these Blocks different ? (use different push rods ?) (small base circle cam)? I know most engines after 1987 had roller lifters. I want to use it with different pistons, aluminum heads and an old style 30/30 flat tappet "solid" lifter cam.
    thanks for any help
     
  2. Lou6t4gto

    Lou6t4gto Veteran Member

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    No One has ever seen this ????
     
  3. badazz81z28

    badazz81z28 Veteran Member

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    I don’t recall the lifters sticking out of the bore too much, just enough to be above the dog bone
     
  4. Lou6t4gto

    Lou6t4gto Veteran Member

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    AND this 350/5.7 has a "Externally Weighted flex plate " ( engine block 149939638 "date code"- Aug 15 1991) !? I thought only sb 400s were "externally" balanced ?
     
  5. Lou6t4gto

    Lou6t4gto Veteran Member

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    **this one, the TOP of lifters is 3/8" Down In The Hole, and only come up to the top when the valve is fully OPEN !
     
  6. bourbon_scotch

    bourbon_scotch Veteran Member Lifetime Gold Member

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    Manufacturer: Chevrolet
    Category: Engine Blocks
    Type: Small Block V8
    Date: 1987-1995
    Notes: 350, 2 bolt or 4 bolt, roller or flat tappet cam, 1-piece rear seal
    http://www.castingnumbers.info/site/search/14093638

    22 350 5.7 89-93 7 V8 OHV, RWD, TBI, roller lifters, center bolt valve covers, high swirl intake ports, right hand dipstick 14093638 14011148 10054727 14088526 14088535 14102193 14102191 10110810
    23 350 5.7 87-92 8 V8 OHV, RWD, PFI/TBI, roller lifters, center bolt valve covers, high swirl intake ports 14093638 14088526 14011148 14088526 14088535 14102193 14102191 10110810
    24 350 5.7 87-92 8 V8 OHV,RWD, PFI/TBI, roller lifters, center bolt valve covers, low swirl intake ports 14093638 14011148 14088526 14088535 14101083 14096217
    http://www.jimsperformance.com/blocks.html

    then check this out
    http://nastyz28.com/threads/1992-truck-350-roller-block-or-not.165632/

    .
     
  7. kenny77

    kenny77 Veteran Member Lifetime Gold Member

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    The change in the lifter bore height was made in 1986. The block should also have the raised bosses that are not drilled for the roller lifter retainer plate.
    Many of the truck engines after 1986 were still not roller tappet engines. Regular hyd flat tappets and normal length push rods go in them
     
  8. Lou6t4gto

    Lou6t4gto Veteran Member

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    thats what it is, No Rollers. just seems strange. if GM was making roller motors after 87, WHY put in the boss for the roller cage and not tap it ? simpler to make them ALL the same "Block". Never understood why GM did alot of things other than squeezing pennies.
     

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