SOHC

Striped spark plug thread please please.

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The problem is swarf falling in. Tapping braze makes the worst kind (it's like sand)

Take it apart and do it properly obviously

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sohc, you should start a company making self tapping 15.5mm sparkplugs.

 

It did cross my mind about a tapered thread self taping sparkplug

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Is the head cast iron or aluminum?

Could you braze it up and run a thread cleaner down it. Might be enough if it's tinfoil bad

 

Head is alooominum, I reckon if i put grease on the tap I should be able to catch alot of the swaf and a blow out and a good hard rev will get rid of the rest. 

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Fuck that^ was weird. Magic sandpaper, glued on hap-hazard threads and all. What a fuck up. Wonder how long it lasted.

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I hope that was the " how not to "repair a spark plug thread video

Wonder what the instructions really said ?

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Get the correct helicoil repair kit and slather the tap in some thick grease for all the shavings to stick to, instead of falling into the cylinder, cleaning it off regularly and reapplying fresh grease. I may have one in my toolbox but I'm all the way down in Wellington sorry.

 

If the motor was mega dollar or in really good condition and didn't want to risk it then pull the head. Otherwise if you get a few bits falling into the cylinder then they'll burn up pretty quickly once its running.

Big whoop.

 

http://www.waihyd.co.nz/thread-insert-repair-kits-spark-plug-xidg60967.html

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Turn the engine over until the inlet valves are partially open on that cylinder and put some compressed air onto a hose on the inlet manifold and pressurize the cylinder to blow out swarf.

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Is JB weld electrically conductive? I'd never personally do it though...

You can powder coat it

And add shavings into it...

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You need a decent thickness of JB weld though. In this situation you'd have bugger all jbweld left (just a few threads after the thread is formed

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I couldn't find any JB weld when it came to fixing up the grooves in the sealing surface of the washing machine shaft. Had no access to machines so I couldn't turn up a sleeve and run a bigger seal either. Just got the hardest general epoxy I could find and it seems to be holding up half a year later (machine is 14 years old or something)

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Just had one of these kits arrive at work(BNT), might be what you are after?
Suits M14 spark plugs, Can do one for $20 inc gst

27356689334_88776d804d_b.jpg

Edit: 2nd pic didnt post, was on mobile

27867652482_8dfebe26ef_b.jpg

Edited by siren676
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If your worried about swarf a magnet pen in there for a while moving around perhaps? Alternatively a new head isn't an overly big or expensive job.

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