S2000 Under The Hood S2000 Technical and Mechanical discussions.

Engine is all fawked up! misfiring?

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Old Aug 29, 2012 | 08:27 AM
  #21  
Kyushin's Avatar
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From: Long Beach, CA
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Originally Posted by Billman250
Your cylinder #1 plug was not tighten properly. The "extra torque" you claim to have used is distortion of the threads from intense heat of blow by.

It pulled air past the threads, leaned out the cylinder, the spark plug tip glowed until it became molten, and melted off into the cylinder.

It did not break off.

These are the facts, 100%.

I'm my opinion (which is usually right) you have cylinder damage from liquid metal dripping on the piston head and being blown into the cylinder walls by the piston coming up at high speed and blasting the drip of molten metal. I've seen it too many times to be wrong.

I guarantee you 100% the piece did not break off and bend a valve. It melted off.

All this from an improperly tightened spark plug. Note the carbon on the silver part. This is combustion blow by.

More facts...not a guess. sorry man..
My god, sounds almost exactly like whats goin on with my cylinder #3 and what prompted my rebuild. The cylinder thread on my #3 even feels funny when changing plugs.
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Old Aug 29, 2012 | 06:45 PM
  #22  
s2000ellier's Avatar
 
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From: Florida
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Threads like this always make me pull my plugs and retorque them to 20lb-ft
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Old Sep 11, 2012 | 09:26 PM
  #23  
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bump for update.

I just saw Billman's update to this thread. Thanks for the help man. This is a pretty shitty situation considering what caused it.
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Old Oct 10, 2012 | 02:48 AM
  #24  
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Joined: Aug 2008
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From: Texas
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Well Im pretty sure i just joined the club! Been up for a few hours researching my now misfire in all 4! Originally it was 1&2 and I guess new plugs, coilpacks, and gaskets did not work!
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