Reply With Quotehard to tell.... exhaust leak? with the plug in does the exhaust gasket line up with the porcelin?
Below is a picture a one of the plugs taken out of BBC 468. Does anyone know what causes the soot on the porcelin portion of the plug ? 7 out of 8 looked like this. Thanks for any info.
http://www.***boat.com/image_center/...0plugsmall.jpg
hard to tell.... exhaust leak? with the plug in does the exhaust gasket line up with the porcelin?
Are your plugs seating properly...Torque'ing them down enough?
Possible bad plugs from detonation? Don't your spark plug boots cover this area of the plug?
If they were to get hot enough to turn the porcelin(sp) any color at least the ground strap would show signs of melting....No? I have never seen a plug cooked before...hmmm.
~Ty
Changed to NKG plugs, tightend headers. Probably fixed ! Will check it out after sunday at Berryessa Ca.
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