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What makes a spark plug do this?


jeff n

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stop giving advise now. A plug lock is not a solution to anything. Plugs backing out is not common. It is a sign your engine isn't happy.

^this!!

Plug locks should really stop being made. All it does is hide a problem and will ultimately at some point blow the engine. Another thing to note is to make sure your plug is tightened down as much as it should be. I can see someone not tightening it down like it should and could come loose from that.

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Fuck off zilla freak, show up at glamis one holiday weekend, and I'll show you when bike hands you your ass on a platter...

 

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Don't be so ass hurt dude. Zilla was giving the correct info to not run those plug locks regardless of what made your bike do it. This forum is what is it because of all the good info you find though out the ball busting and bullshit. If what he said its gonna put your panties in a bunch you gotta grow some thicker skin. Your not gonna last long here.
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Lol, not ass hurt, I learned from trial and error, dude just needs to understand that my plug coming out wasn't from detonation, I was way off on jetting. I guessed on my needles and was way off, started with ccj needles and 165 mains, idled great, ran great wide open, ran hot, on slow cruise and racing up Oldsmobile hill it would occasionally spit the plug on the right cylinder, I thought I wasn't getting it tight enough so I bought the plug lock, I had to take my head off while in the tuning stage when I took my reed cages off to put in v force 4's, I found part of a reed had broken off and went through the cylinder. When I pulled the head off, I seen that the piston was slightly hitting the head, not enough to do damage, but enough to have no carbon buildup, so I took the head back to the shop, had it rechambered, still keeping my 165 psi compression, talked to the shop about what needle jets to run, since the ccj needles were way too rich too early, he told me try dgk needles, and if I need a leaner hit run cel needles, I didn't know about this forum until much later after the school of hard knocks was let out.

 

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Lol, not ass hurt, I learned from trial and error, dude just needs to understand that my plug coming out wasn't from detonation, I was way off on jetting. I guessed on my needles and was way off, started with ccj needles and 165 mains, idled great, ran great wide open, ran hot, on slow cruise and racing up Oldsmobile hill it would occasionally spit the plug on the right cylinder, I thought I wasn't getting it tight enough so I bought the plug lock, I had to take my head off while in the tuning stage when I took my reed cages off to put in v force 4's, I found part of a reed had broken off and went through the cylinder. When I pulled the head off, I seen that the piston was slightly hitting the head, not enough to do damage, but enough to have no carbon buildup, so I took the head back to the shop, had it rechambered, still keeping my 165 psi compression, talked to the shop about what needle jets to run, since the ccj needles were way too rich too early, he told me try dgk needles, and if I need a leaner hit run cel needles, I didn't know about this forum until much later after the school of hard knocks was let out.

 

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Yeah....it was deto.

 

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The first few times, it was so, so, ran fine at idle and 1/2, throttle up, it did it once after getting it dialed in, I don't think I had the plug tight, I was also running b8 plugs, run b9 now I thought it had a detonation problem, there were no signs of it when I had the head off then

 

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The first few times, it was so, so, ran fine at idle and 1/2, throttle up, it did it once after getting it dialed in, I don't think I had the plug tight, I was also running b8 plugs, run b9 now I thought it had a detonation problem, there were no signs of it when I had the head off then

 

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wait. Fucking wait.

Your piston was hitting the dome. That's what made the knock? That and the reed breaking put all the dents in the piston?

But you saw no signs of detonation? GTFO.

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