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5/16 plug

Discussion in 'The Garage' started by bigbadchev84, Jan 26, 2005.

  1. bigbadchev84

    bigbadchev84 1/2 ton status

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    i have a new engine i am getting ready to stick in the blazer and am wanting to run my stock gauges and mechanical, in the pasenger side head it has a square headed plug, it is 5/16 though, i went to the parts stores in town and they cant get one, i tried the hardware store and got some 5/16 square stock but it just twisted, the plug is in there good! anyone know how to remove it?
     
  2. folkenheath

    folkenheath Worthless Trash Premium Member GMOTM Winner

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    If you have a grinder take a hardened grade 8 bolt, a short one, and grind 4 flats on it so it just fits the square, then pound that in the plug and put a socket on it. It's super cheap and it should work. Good luck.
     
  3. R72K5

    R72K5 Banned

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    a 3/8" ratchet drive is supposed to fit in that

    heating up and melting candle wax into the threads usually always works
     
  4. GMCLegacy

    GMCLegacy 1/2 ton status

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    i ran into the same problem on an 88 tbi 350. the ground down bolt did the trick for me. you need a 5/8 or 3/4" bolt to start from.

    or if you have a short extension laying around, it would be easy to make fit.
     
  5. CyberSniper

    CyberSniper 1/2 ton status Premium Member

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    Keyway stock from your favorite hardware store or tractor store works pretty good in instances such as this.
     
  6. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    i'm sure you'll figure something out.. i used to use ss keyway stock all the time back in the day. but they do make proper tools for all square drives... http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=65528&group_ID=259&store=snapon-store&dir=catalog

    i own male and female squaredrive sockets. vital when you run across as many drain plugs, etc as i do.. http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=1588&group_ID=259&store=snapon-store&dir=catalog

    pretty sure Craftsmen has em too...
     

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