broken spark plug fell in cylinder 1

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Thread: broken spark plug fell in cylinder 1

  1. #1
    SupraForums Member tharussian45's Avatar
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    broken spark plug fell in cylinder 1

    so today i was changing my spark plugs when the spark plug on cylinder 1 broke, and a piece fell in cylinder 1. i thought i got it out, but turns out i didn't... started the motor, and i could hear the piece bouncing around in the motor and it made a bad knocking sound. just wondering if my valves are gone or bent? and what is the worst that could happen? do i need a new head? piston? valves? etc.. any input would be good. has this happened to anyone before and what was the damage? really pissed at myself at this point... maybe its time to do a gte swap....

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    time to pull head and inspect.. there isnt any other way to know for sure.

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    SupraForums Member tharussian45's Avatar
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    im gonna start tomorrow i guess... FML. btw.. does anyone know what years lexus sc300 heads will work for my 94 supra?

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    man that sucks, i think that motor is done...

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    SupraForums Member tharussian45's Avatar
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    im hoping its just the head... i can get a used head for a sc300 for $250 in the tampa area... and i hope the piston itself is not messed up... the piece that fell was not the metal part of the spark plug, so i hope it was soft enough to not do too much damage...

  7. #6
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    Pull the head and inspect, it's the only way. Hopefully you only have a bent valve, but it may be worse. That part that broke up was probably the ceramic part, which is a very hard material...enough to do some damage. Good luck man.
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    hopefully, please keep us updated.

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    SupraForums Member vacuumlogic's Avatar
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    Damn that sucks man, gonna have to pull the head off. Hope there isnt any bad damage

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    SupraForums Member tharussian45's Avatar
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    thanks for the input guys.. so does anyone know if the sc300 head will work on the 94 na supra?

  11. #10
    2JZ NA-T
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    any 2jz head will fit as long as it non-vvti.. 250 is a bit pricey i think... thats just me though.. dont rush into buying a head just yet, it might be a lot worse, or not that bad.. just pull the head and see what what you find. keep us updated...that sucks..
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    SupraForums Member tharussian45's Avatar
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    Thanks Ravan. I really hope it's just somethig minor. That way if I need to I can just swap heads and be done with it.

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    SupraForums Member vacuumlogic's Avatar
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    Let us know what you get the head for if you have to go that route

  14. #13
    SupraForums Member tharussian45's Avatar
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    Well, there's a junk yard near Tampa that has them for $250, but the only thing is that it's for a sc300.

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    SupraForums Member Juhanis's Avatar
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    that's kinda quick to call the head wasted... if it runs on all its cylinders it may be fine. depending on how big the chunk was that went into the cylinder the piston and combustion chamber areas are likely damaged a little. do a leakdown test, and if possible inspect the bore with a bore scope... you may save yourself some time and money. but if the hideous noises are consistently happening, and its obviously not running on all six, than yeah, the head's probably wasted, likely other parts too.

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    2JZ NA-T
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    you can literaly pull the head within a matter of a few hours if you got the tools, experience, or some one to help, i gues you could go with a bore scope to see right off the bat if you find signs of severe damage..but then if you dont find signs of severe damage i would still pull the head just to make sure everything is ok... but thats just me.

    that is a good question though, how big was the chunk that fell in?

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    How big of a piece are we talking here? If its just the electrode, it wont cause any harm and your engine will probably spit it out. If a harder piece of the spark plug somehow fell in, then I wouldn't start it. As long as you didn't let it run for too long to damage anything, all you have to do is pull the head, clean out whatever it was, resurface and bolt it back on with a new gasket/bolts.
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    Addicted to oil survyor2's Avatar
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    I ran into this problem before. We dropped a single white chip of the ceramic from a spark plug. We just cranked it with no spark plug and the chip fellow out right away.

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    SupraForums Member tharussian45's Avatar
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    well, the piece was about the size of a jelly bean... and i only started it for about 10 seconds. it seemed to be running on all 6 cylinders perfectly, so im hoping that it didnt do too much damage, but i dont think the piece was small enough to get spat out... do you guys think it is still in the cylinder? or would it have gone to some other part of the engine? like would i be able to see it if i take the valve cover s off?

  20. #19
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    Nothing should be damaged then. It's probably too big to get past your valves and into the exhaust.

    You'd have to use a borescope in order to see what's in there. Grab a hose big enough to suck whatever fell in, but small enough to fit in the spark plug hole. Get a hold of a heavy duty shop vac and duct tape the shit out of hose to the vac. See if you can suck out whatever fell in, its worth a shot and might save you the trouble of having to dismantle half your engine.

  21. #20
    SupraForums Member tharussian45's Avatar
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    good call on the vac... ill try that... started removing the intake manifold stuff so far... im stuck on the egr...what a pain... btw. where can i get a borescope? any auto parts store?

  22. #21
    SupraForums Member tharussian45's Avatar
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    ok, heres some word on the progress...
    took the intake and valve covers off... got the egr finally...(hate that damn thing. took off some skin on my hands in the progress..) then i took all the spark plugs out and hand cranked the engine... went smoothly until cylinder 1 hits TDC... then i could feel and hear the ceramic piece start to get smushed... now i tried sticking a metal rod in the cylinder to see if i could feel a difference in height, and it seems that the piece is not in the cylinder itself (meaning its not laying on top of the piston). now does anyone know where it could be? stuck in between the valves maybe? not really sure... also, if i take the cams off, will i be able to see inside the cylinder? or at least the tops of the valves?

  23. #22
    Found E85 NOT in NJ! twinturbosupra94's Avatar
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    Damn man that sucks....wished you lived closer, I would give you my head for like $50 to help you out.

    It could be sitting ontop of the piston still and the valves are pressing down on it

  24. #23
    Master Yos 97 black supra's Avatar
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    I have my old NA head if you need one it's got stock cams stock valves but no shims or buckets

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  25. #24
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    Guy relax, a piece of ceramic isn't going to harm anything.

  26. #25
    Tell me bout the whistles Vu's Avatar
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    Quote Originally Posted by Tuner562 View Post
    Guy relax, a piece of ceramic isn't going to harm anything.

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