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Thread: Spark plug socket

  1. #1
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    7,578

    My VIN:    03572

    Spark plug socket

    Is your spark plug socket hard to remove after installing the spark plug? Mine has always been a big effort to pull that socket off the plug.

    I was using an old Sears Craftsman 5/16 spark plug socket which is probably 50 years old. It turns out the OD of that socket is 0.888" and it is binding on the aluminum in the spark plug valley.

    I now used a 16 mm long socket which has an OD of 0.858" and it just pulls right off with no effort.

    Not sure if Craftsman has changed the OD now but I bet this also affected my torque of 15 foot/lbs.
    Dave M vin 03572

  2. #2
    Senior Member Silverbullet's Avatar
    Join Date:  Jul 2012

    Location:  Brea, CA

    Posts:    593

    My VIN:    3757

    Snap on magnetic.... way worth the money....Trust me. And it is not a 5/16..

  3. #3
    Senior Member SBL's Avatar
    Join Date:  May 2011

    Location:  Treasure Island, FL

    Posts:    103

    My VIN:    10342

    Club(s):   (DCF)

    Can you be more specific?
    Steve Liggett
    Treasure Island, FL
    1982 automatic, VIN 10342, grey int

    Previous: VIN 5983, VIN 3670
    Who knows where my previous 1981 with 6 cylinder Chevy engine is these days (cannot find that VIN) ?

  4. #4
    Administrator Ron's Avatar
    Join Date:  Jun 2011

    Location:  North GA

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    Club(s):   (SEDOC) (DCUK)

    Quote Originally Posted by SBL View Post
    Can you be more specific?
    I think he means this one:

    Dave, drill a hole in yours like the one in the pic above. Look inside the square hole and pick a side that already has a dimple for the spring loaded ball bearing on ratchets and extensions. You will then have to pull very hard or use a punch, or similar, to release the ball bearing before it will turn loose. (I found an extension with a long, flat faced pin instead of a ball bearing making it impossible to just pull it off.)
    Most of them have a rubber insert that keeps the socket from falling out. (... contributing to the problem?) When they get old, they either don't work or like to stay on the plug, a PITA to get out of a recessed hole in some heads. I just remove it, get a narrow strip of plastic (trash bag, etc.) and put it over the plug before loading the socket...

    Never noticed a Craftsman or Snap-on socket binding when installing D plugs, fwiw.

  5. #5
    Not a DeLorean Guru
    Join Date:  May 2011

    Location:  Rochester, NY

    Posts:    2,395

    My VIN:    01049

    Don't listen to Ron; he eats sockets.

    My engine twists my frame.

    1981 DeLorean, Carb LS4 swap completed
    1999 Corvette, cam/headers/intake manifold, 400 rwhp
    2005 Elise, stock
    2016 Chevy Cruze

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