Logo
FULL SITE MENU

Spark plug broken off in head. Need advice please.

R

rikclark

Member
'86 150 V6
Just finishing spring tune up. Pulled plugs to inspect. All looked good with less than 20 hrs so decided to reinstall. Installed 5 with torque wrench @ 12 ft-lb. felt something "give" while installing last plug, then realized it was spinning free. Removed socket with plug/electrode, but threaded portion of plug is still in head.
Is it wise to try a screw extractor tool? What other options do I have? Really concerned at this point. All input welcome.
 
Once you've got the head off you will hopefully also be able to grab the electrode with vice grips and wind it out.

Good luck! I'm sure it will be fine. :)
 
Pics of broken plug attached. As you can see i have the ceramic tip including the electrode. The part left in the head is the threaded collar with a hole in the center.
Should be easy to get a grip with a screw extractor. Do you think this to be a dangerous approach?
Yamaha Service Manual calls for plugs to be torqued 10-15 ft-lbs. have always torqued to 10.
 

Attachments

  • IMG_20150525_193154_670.jpg
    IMG_20150525_193154_670.jpg
    65.5 KB · Views: 59
  • IMG_20150525_192657_410.jpg
    IMG_20150525_192657_410.jpg
    100.4 KB · Views: 82
  • IMG_20150525_193001_227.jpg
    IMG_20150525_193001_227.jpg
    38.8 KB · Views: 49
I'm honored to receive help from such a YouTube celebrity. Thanks for the link and thanks for the encouragement. I'm out of town on business, but when I get back I'll address this issue and report back to all who have provided input.
 
Success! Was stating "Easy Out" with my fingers to see how well it would grip and the threaded collar came right out. No wrench, no torque and no debris in the cylinder. Thanks for the input you guys. Sincerely appreciated
 

Attachments

  • IMG_20150602_121124_308.jpg
    IMG_20150602_121124_308.jpg
    65.9 KB · Views: 46
  • IMG_20150602_121228_071.jpg
    IMG_20150602_121228_071.jpg
    59.1 KB · Views: 44
Back
Top