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Discussion Starter · #1 ·
hey guys
I ahve a stripped spark plug hole in my83 280 zx and I need to know if anybody has had any luck trying to repair them. i don't know how it happened but if you have any ideas drop me a line thanx cole
 

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> hey guys
> I ahve a stripped spark plug hole in my83
> 280 zx and I need to know if anybody has had
> any luck trying to repair them. i don't know
> how it happened but if you have any ideas
> drop me a line thanx cole

As far as i know the best way to repair a stripped spark plug hole is to use a Heli-coil in the threads. You may have to remove the head first though, but i have never done this personally.

good luck-evan
 

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Discussion Starter · #3 ·
Any machine shop that does engine work can make the repair or you can try it yourself. I made the repair on another automobile, so my experience may not apply to 'Z's, using a spark plug thread repair kit purchased at AutoZone. The kit is made for specific diameters, in my case 14mm, and comes with a special tap that basically reams the stripped hole and proceeds to cut threads for a steel threaded insert. The insert is installed per instructions and the repair is made. I did have the head off when I made the repair, which I'm sure would be best. Reaming and then cutting threads can't help but drop shavings into your cylinder. Although, if it was an emergency situation I may be tempted to try sucking the chips out with a vacuum. The kit was about $25. Good luck.
Dan

> hey guys
> I ahve a stripped spark plug hole in my83
> 280 zx and I need to know if anybody has had
> any luck trying to repair them. i don't know
> how it happened but if you have any ideas
> drop me a line thanx cole
 

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Registered
Joined
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56 Posts
> hey guys
> I ahve a stripped spark plug hole in my83
> 280 zx and I need to know if anybody has had
> any luck trying to repair them. i don't know
> how it happened but if you have any ideas
> drop me a line thanx cole

Hey Cole,

You can fix this yourself. The helicoil/thread repair kits are available from NAPA and/or most auto parts stores for $25-$30 with several coils per kit. To do this job without having to remove the head, put grease on the oversizing tap to trap aluminum shavings. And to help prevent future recurrences, use an anti-sieze paste/compound on the threads of spark plugs whenever you change them in an aluminum head to prevent dissimilar metals corrosion. mikey
 

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56 Posts
> hey guys
> I ahve a stripped spark plug hole in my83
> 280 zx and I need to know if anybody has had
> any luck trying to repair them. i don't know
> how it happened but if you have any ideas
> drop me a line thanx cole

Hey Cole,

You can fix this yourself. The helicoil/thread repair kits are available from NAPA and/or most auto parts stores for $25-$30 with several coils per kit. To do this job without having to remove the head, put grease on the oversizing tap to trap aluminum shavings. I have done this on several vehicles with no problems. And to help prevent future recurrences, use an anti-sieze paste/compound on the threads of spark plugs whenever you change them in an aluminum head to prevent dissimilar metals corrosion. mikey
 

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Discussion Starter · #6 ·
> Any machine shop that does engine work can
> make the repair or you can try it yourself.
> I made the repair on another automobile, so
> my experience may not apply to 'Z's, using a
> spark plug thread repair kit purchased at
> AutoZone. The kit is made for specific
> diameters, in my case 14mm, and comes with a
> special tap that basically reams the
> stripped hole and proceeds to cut threads
> for a steel threaded insert. The insert is
> installed per instructions and the repair is
> made. I did have the head off when I made
> the repair, which I'm sure would be best.
> Reaming and then cutting threads can't help
> but drop shavings into your cylinder.
> Although, if it was an emergency situation I
> may be tempted to try sucking the chips out
> with a vacuum. The kit was about $25. Good
> luck.
> Dan

I did this on a Ford Escort I owned. I used a vacuum to suck out as much shavings as I could. I didn't notice any problems when I started it up due to the shavings, but it was just a Ford that I don't care about as much as my Z. :) Use a really powerfull vacuum if you have to do this.
 
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