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92 Honda Accord spark plug blew out!
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the fly
New User
Dec 31, 2008, 7:51 PM
Post #1 of 2
(1983 views)
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92 Honda Accord spark plug blew out!
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Does anyone know if this is fixable. This is a 92 Honda Accord with 4 cylinders.
I was driving along and heard a loud bang, then I could hear (and feel) that one of the pistons was banging up and down very loudly. After checking it out, I noticed that one of the spark plug wires had blown out. There appears to be some damage, as well.
It seems to me that it would take some major work to fix it, but I am not mechanically inclined, so I would appreciate anyones thoughts. Also, what might have caused it?
Thanks.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 31, 2008, 8:39 PM
Post #2 of 2
(1981 views)
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Re: 92 Honda Accord spark plug blew out!
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Hmmm? Happy New Year anyway
Where's the plug that blew out? I see what looks like some damage to the valve cover when it no doubt took a flight out of there that MAY be ok to leave that way - not sure yet.
It may have just been a loose plug from the last time it was touched and finally just worked its way loose enough to come out with the force of the engine running of course. They will make a loud noise if run with one out.
Guess + try: It may be ok to just put another plug in but just in case the last couple threads of the plug hole were damaged a lot of care should be used in putting a new one in again. They make "spark plug thread" chasers which are "machine taps" for the threads of a spark plug or if you really have a good feel for it try to thread a new one in with no more force than a rubber hose on the plug will provide such that you don't cross up threads. If you can get a couple turns without much force it's usually ok to proceed with the socket and tighten it up.
Pics are pretty good and I'm not certain what if any problems will arise from the valve cover missing a small chunk missing as seen and some banging marks/battle wounds of the plug finally coming out. It might leak oil when completed and may require a new sleeve if separately available or a good used valve cover - not sure?
Do you know when the last time plugs were touched by anyone for any reason? Stuff happens but more likely soon after if it was left too loose. It does look like it was thrashing about in there for a while and I can't understand why it didn't give some noise to alert you long before if just a loose plug??
Random thoughts: If this is an "interferrence" engine and timing belt broke or slipped way off its mark it could have had a valve collide with the piston but it would have to more than one and I can't explain right now why the plug would come out if it was properly in there to begin with?? Since you need to do something I suggest looking at the other plugs for any evidence of damage in other cylinders first. If timing belt is ok and engine ran after this happened then this might just be bad luck with a loose plug that took some time to work itself out. If it ran to get it to where you took the pics then it just might run as well as it did before all this with just a new plug in there but again I stress - DON'T CROSS UP THE THREADS in trying to install a new one!
Let us know how this works out. It's a new funky problem for me. I've seen plugs come out of other type engines and the plug is still on the wire after weeks of a ticking noise usually. That plug wire may have sustained damage too as it needs to stay electrically insulated down that tube to the plug or that cylinder would/could misfire. Note - 4 cyl engines run VERY poorly with one cylinder down for any reason. Some V8s tolerate it enough to drive on for quite a while but not 4s.
Good luck,
T
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