broken spark plugs tools and technique advice needed

  • 05 Dec 2018 10:02 AM
    Message # 6946783

    Hi there , I have recently picked up an 1983 gl1100 , Goldwing ,it sat outside long enough that the left side rear  sparkplug was corroded . One on them snapped off after soaking in penetrating oil for 3 days . so my question is what tool / extractors have been used successfully for a similar issue without pulling the whole head off. Youtube is nice but i would like some input. thanks . 

  • 05 Dec 2018 12:59 PM
    Reply # 6947142 on 6946783

    what part broke off?  Is it just the porcelain? If so the hex is still there. Judicious application of heat is what you need. Most penetrating oil is a waste of money and the most useless is WD40.

  • 05 Dec 2018 5:15 PM
    Reply # 6947587 on 6946783
    Ian (Administrator)

    I agree with Barry. heat the area and when the area is starting to get warm apply slight presume to your wrench. Do not use force. As the case heats & expands your might get lucky and the plug will move. This has worked for me many times.

     

    WD is not a lubricant . I do like PB Blaster myself.

  • 05 Dec 2018 5:51 PM
    Reply # 6947599 on 6946783

    Andrew....... did the porcelain AND the metal hex portion portion brake off? Leaving just the “threaded spool” in the hole?? I had this happen not long ago and it is a bugger! I carefully drilled the largest hole possible through the remaining portion (without getting into the threads!). Then used an easy-out tool to back the spool out. I had a vacuum cleaner running with a hose close to the drill bit tip, keeping most of the swarf out (I hope). Easy Out is sort of like a reamer, but the flutes are cut on the back side of the shank. It’s tapered, so you tap it in to engage and then twist counterclock wise....... heat the area up and cool the “spool” by inserting a cold (frozen) tool like a small drift. Hopefully it will shrink the spool away from the warm head and com out. Don’t be tempted by a cheap set of KD Easy Outs. They are hard and break easily. Go to a good machine shop supply house and buy a good one! 

    Good Luck! John D.

  • 06 Dec 2018 10:25 AM
    Reply # 6948386 on 6947142
    A.
    Barry wrote:

    what part broke off?  Is it just the porcelain? If so the hex is still there. Judicious application of heat is what you need. Most penetrating oil is a waste of money and the most useless is WD40.

    As Barry says. Heat the head gently. In extreme cases,then putting ice on the inner part (the plug in this case) will help it shrink, ever so slightly, but enough to loosen it.

    Did this with a sprocket frozen on a tapered gearbox output shaft. With the puller on as tight as possible and no movement, heated the sprocket gently, still no action, put an ice cube on the shaft, BANG! The puller and sprocket flew about 10 ft across the shop - without hitting anything.


  • 07 Dec 2018 11:04 AM
    Reply # 6949813 on 6946783

    Heat Heat Heat, Cool Cool Cool, Heat Heat Heat Cool Cool Cool, Do it over a few days, Heat steel part red hot, use, Square  Easyout, or Square chisel, Make sure piston and valves out of way, If that doesn,t work,  Drill Helicoil, or remove head and do the above on bench. Good Luck

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