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Opinion on this 350

Discussion in 'The Garage' started by hunterguy86, Apr 18, 2007.

  1. hunterguy86

    hunterguy86 1/2 ton status

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    I'm thinking about picking up a 4 bolt main 350 that has been bored .30 over. The block and everthing seems ok except for one cylinder. The valve spring broke allowing the valve to fall down into the cylinder and make contact with the piston. Even though that cylinder was not working properly, the engine still ran great. Pics of the piston are below.

    Also I would guess that since the valve spring broke I need to go through the heads. Would it be cheaper to rebuild the heads or get a set of new ones?

    I found these heads on summit. Would they be good for a mudder/DD?

    How about this for an intake?

    I'm sure the cam got trashed when the valve spring broke. How about this for a replacement cam?

    Here are some pics of the piston.
    [​IMG]

    [​IMG]
     
  2. Jason4x4

    Jason4x4 1/2 ton status

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    slap on some vortec heads and call it done.
     
  3. hunterguy86

    hunterguy86 1/2 ton status

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    Any thoughts on the links to the parts I posted?
     
  4. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    the heads, intake and cam look good. Maybe one of the desktop dyno guys can plug it all in for you. Should be a nice mild motor
     
  5. big dan

    big dan 1/2 ton status Premium Member

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    so it would be ok to run it with the piston like that? I know the damage isnt that bad but would it weaken the piston any?
     
  6. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    it does weaken the piston but he is not looking at a high performance build. It should be alright.
     
  7. vortec

    vortec 1/2 ton status

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    i'd say if you're pulling the heads, anyway, replace at least that one piston while you're in there. it would just be more hassle later, when it had to be done anyway. it's hard to see just how bad the damage is from that pic, but it could cause stress risers or allow uneven heating on the metal.
     
  8. roadnotca

    roadnotca 3/4 ton status

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    Where did the broken valve head go? Into the head?
    The heads, intake and CompCam look good.
    I would recommend dis-assemble the whole engine, clean, inspect and reassemble with old parts that are serviceable = replacements and new gaskets, etc.
     
  9. Bo 84stepside

    Bo 84stepside Newbie

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  10. roadnotca

    roadnotca 3/4 ton status

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    Good price!
     

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