have you ever seen this

[rx-1 blue reverse]

I wa trying to start my sled when the spark plug came out of the engine w/ a bang(see picture). I just got done cleaning the carbs out because of it would not idle. I do not belive that I did anything wrong when I cleaned the jets out, so if anyone has any ideas of how this could happen? Help! :cry:

 

[rightarm]

Can't tell the picture is fuzzy,did you have the right wire in the proper cylinder. :?

 

[Bob Miller]

From what I can see, it looks like the threaded part is completely worn down And if this is the case the sparkplug was probably real loose in the head and when you run the engine with it loose it will vibrate inside the hole and wear down! :roll:

 

[Smokey]

Could it be a faulty plug.....Friend of mine last on his vehicle heard a bang the entire porcelin part of the plug blew out made dent in the hood. The rest was still in the hole. The plug had a hole right down the middle into the cylinder...I seen it with my own eyes. Put a new plug in and everything was fine. Hope yours is a simple as that.

 

[rx-1 blue reverse]

I am posting a clearer picture. The threads are not worn off they are still in the engine. :cry:

 

[Ski-Dog]

I've seen that in aluminum heads on automobiles when trying to take them out. Plugs can sieze in an aluminum head if left in there long enough. With todays cars 80,000 on a set of plugs is almost average but try to get them out. I always put a dab of anti sieze on them. This wouldn't have been your problem though. The plug may have been stressed if torqued too tight. Where it broke is the weak part. The big thing now is that you must get the threads out of the head without getting any crap in the cylinder. There is a special easy -out device designed to remove these and you must be very carefull. If you are lucky the threads of the plug won't be seized in the head and they will spin out easily. If you find one of these easy outs load it with grease before using so if there are any slight metal fragments when it bites they will stick to the grease and not go down the cylinder.

 

[neonphil]

I retouch the pic.

 

[deshkae]

LOOKS LIKE A FAULTY PLUG TO ME. MANUFACTURES DEFECT. THE BANG YOU HEARD WAS THE EXPLOSION WHEN THAT THING CAME APART.

NEVER SEEN THAT HAPPEN BEFORE.

 

[SUPERTUNER]

I am posting a clearer picture. The threads are not worn off they are still in the engine. :cry:

You overtightened the sparkplug and broke the very first wind of threads closest to the top of the threaded portion. I am 100% certain of this....ask me how I know. :x

You will have to get the threded portion that is still in your engine removed. I suggest taking a large easy-out and installing it on an extension to reach way down where the sparkplugs go.

DO NOT ATTEMPT TO TURN THE ENGINE OVER UNTIL YOU HAVE IT REMOVED!!!

Do not tighten these little 10mm sparkplugs like you used to tighten those big ole 14mm sparkplugs in your 2 stroke.

Good luck, it is not as bad as you think.

Freddie

 

[spray25]

You overtightened the sparkplug and broke the very first wind of threads closest to the top of the threaded portion. I am 100% certain of this....ask me how I know. :x

I'll bite, How do you know?

 

[JDKRXW]

Before you do anything to remove the threaded portion of the plug, I'd oil up a long piece of string, and feed as much of it as possible into the cylinder (don't do anything to move the piston). Then use the eazyout as mentioned above. After you've got the threaded part of the plug out, take a small magnet attached to a wire to probe aroundfor metal shavings.
Once you've got the big bits out, hopefully any filings will stick to the oily string. You'll probably need long tweezers ot needle nose pliers to grab the string.
Just an idea.

 

[Convert]

Exact same thing happend to my son's car like the threads were welded to the head never did get it out just junked the POS was'nt worth the effort to fix, he broke his trying to change plugs. Spray my guess is Supertuner overtuned his plugs a little Good luck rx-1 blue reverse that really sucks. Did you pull the plugs or was it like that from the factory? they gotta prove you did it right?

 

[SUPERTUNER]

Being careful is certainly not going to hurt but there shouldn't be any problem getting the threaded portion out as it is not a blind hole. In fact, the threded portion is probably loose in there just sitting there as it has no base to the plug to tighten down to anymore.

Do indeed take some precautions but if you were able to reach down into the sparkplug well with your finger tip and touch the top edge of the threaded part, it would probably turn out with your finger tip.

How do I know? Been there, done that! Not on the RX1, but on Hayabusa's, GSXR1000's and ZX12's!

Freddie

 

[rx-1 blue reverse]

Thanks for all the info. That is what makes this site great.
This morning I went to the store and bought an ezout and 4 new plugs. The threads came out with no effort. I but 4 new plugs in, carefull not to overtighten them and the sled started right up. Again thanks for the help

 

[spray25]

I'm glad it came out so easy.

I hope to never have that experience for myself.