JSolo

iTrader: (14)

Maybe¿? This thread prompted me to do some more reading. Apparently there can be some internal leakage, so that could very well be burn marks/blow through. It's been ages since I replaced plugs, usually on the motorcycles. Albeit, last bikes were sold/traded before plugs were due. I'd say follow torque instructions to the letter - ie, some say bottom out then 1/4 or 1/2 turn, others give a specific torque value.

BULL

That is moisture cycles. Usually in colder climates you see a lot of moisture in the spark plug holes. Typically most coil on plug setups are engineered to block outside contaminants. This same seal will seal the outside with the inside.
So many times as the engine is warming up it will heat up the air in this tube and cause condensation. Many folks have seen this. This condensation just coats everything in there and will sit on everything until it the engine heats up and can evaporate this.
As the car sits over time it develops more condensation, and will start attacking. The reason it looks like this is because there is moisture in between the ceramic and the metal surrounding it and as it warms up and starts evaporating some of the rust will start to follow as well.

New sets of plugs will do the job, make sure you take apart your coil tubes and clean them properly as well. It could help to do this on a hot/dry day.

spoolin03

Anybody **** with pulstar spark plugs?