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determining 350ci flexplate diameter ?

Discussion in 'The Garage' started by R72K5, Jun 11, 2005.

  1. R72K5

    R72K5 Banned

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    Location:
    central IL
    how can i tell what diameter a flexplate is thats bolted to a 350 and in a rig ?

    need to find out whats on this 79 short k-10 next door

    the starter is staggered bolt nose cone.
    but it seems like it was like miles away from the flexplate...

    it grinds when trying to crank and wont crank,
    has no shims now but it had a bunch under it before,
    but we removed them, its a little better now but still wont crank,
    teeth ar ein perfect shape and starter looks fine too,. hmm..

    cant tell if its 12.5 or 14" one just by looking with the converter cover removed,

    what to do ?


    thanks
     
  2. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    I always thought a 350 flex plate was a 350 flex plate.

    I dont know if it means anything,I measured one that I have for my 350 and its 14".

    Chris
     
  3. Muddytazz

    Muddytazz 1 ton status

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    I just stuck a tape measure up inside the inspection area of mine and its a 14"
     
  4. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Both flywheels and flexplates come in either 12 3/4" or 14" diameters.
     
  5. Beast388

    Beast388 1/2 ton status

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    The staggerd bolt pattern on the starter indicates a 168 tooth 14" flexplate. The straight across pattern fits the 12-3/4 153 tooth flexplate.

    If your starter is grinding, you might need to shim the starter. Check the nose on the starter for cracks. That can cause the bendix to partially engage or flex away and grind.

    Good luck! :D
     

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