ya..that sucks man i've never heard of that happening..but i hope it all works out for you and that you just have to put a new plug in it but thats probably not the case..good luck
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92 4 Dr Ex-sold/91 civic hatch(bad head)/93 civic vx
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sedans are better!!!
i feel good cause i beat a 350z~Comment
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x3.....only cause thats what i got stuck with lolOriginally posted by f22a4boy View Postsedans are better!!!92 4 Dr Ex-sold/91 civic hatch(bad head)/93 civic vx
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anyways.... they have a temporary fix at advance i saw one day its like a sleeve you can put in or something like that i was bored and browsing or you could always do a sparkplug with jb-weld dunno how long thatd work haha if you dont want to shell out the money for the headOriginally posted by s-Lowcb7 View PostComment
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wtf? sedans are better? have u guys seen properly done coupes? in gloss black? are u crazy?Comment
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Sorry to interrupt the coupe vs sedan debate...
I put a new plug in today. The threads on the head grabbed it fine. I'm starting to think inside of shot out completely, it maybe vibrated loose some. Then once it backed out enough, popped out.
Either way, all would seem fine again at the moment.Comment
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Sedans are awesome in form AND functionOriginally posted by trouty View Post
@phiend; Hope it all stays fine. This is the first time I've heard of a spark plug jumpin' out like that :xComment
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It will need a heli-coil or some form of thread plug insert. Ideally a heli-coil would be fitted with the head off, but I've seen them fitted with the head in situ. To do this the heli-coil tap is covered in a substantial amount of grease so that all (?) the swarf gets caught in the grease rather than falling into the combustion chamber. To my mind this is a little risky as I can't see that you can guarantee that no swarf will end up inside the motor, but it is the cheaper option. An insert will definitely need the head off I'd expect.
In theory, either a heli-coil (or insert made of steel) will provide a less efficient heat pathway than the alloy of the head casting, to some degree impairing heat transfer from the plug to the head casting. Just how much of a problem this would be in practice I'm not sure, but it wouldn't be a bad idea to run a plug in the heli-coiled cylinder that was one heat range colder than the other three plugs...
The thread could have been damaged years ago and just been hanging on by it's fingernails since then, it may not have been caused by anything you did.Regards from Oz,
John.Comment
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Glad to hear that, although i have never heard of such a problem.Originally posted by phiend View PostComment
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I'm glad a new plug fixed your....unique.. problem.
Otherwise it could have been real expensive.
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a cheaper route than a head swap would be a Heli-coil, its like a makeshift threaded insert and they might sell them, but im not sure. just be very careful not to get any chips into your cylinder. id find a way to introduce air into the intake manifold and make sure the intake valve is open to that cylinder so it would force the chips upward and hopefully out of the cylinder, but on the other hand, and h22 head would be fun right!Originally posted by phiend View PostComment
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sorry, mabye i should read till the end before answering, but it was a good idea i say!!Comment
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Ok back to your plug problem... you may have not stripped the hole with the new plug. Your'e working with dissimilar metals that are subjected to a lot of heat and will expand at different rates. Aluminum head, steel spark plug. The damaged probably happened when removing the old plugs. You just didn't notice the threads on the old spark plug. You can replace the threads by using an insert or you could replace the head. To keep it from happening again make sure you coat the thread of the plugs with anti-seize compound.1991 Accord Ex Black/Tan... bone stock 45,000 miles
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