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  #1   IP: 138.207.177.95
Old 11-30-2021, 01:03 PM
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joe_db joe_db is offline
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Ever seen a plug leak?

This is a weird one: I was wondering why my tune-up generated such a large increase in power. Not complaining, but I got a lot more than I expected.
Looking at the old plugs, I seemed to find what looked like an exhaust residue trail on the porcelain of #1. What the.....
I swapped it back in and gave the engine some MMO for a smoke test. Sure enough, smoke was coming out around the insulator. Not from the plug threads, up top around the insulator.
I guess it makes sense a plug could do this, but I never heard of it before.
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  #2   IP: 162.245.50.230
Old 11-30-2021, 07:28 PM
Dave Neptune Dave Neptune is online now
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The plug is cracked or broken inside, either the porcelain or the metal/porcelain seal allowing the leak. Just replace the plug.

Dave Neptune
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  #3   IP: 138.207.177.95
Old 11-30-2021, 09:01 PM
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