I just replaced my spark plugs and when I pulled my L1 plug it was wet. The car had been sitting for over 48 hours prior to replacing the plugs. I couldn't really tell what it was wet with but it almost looked like coolant. The first thing I did was check the coolant level and while the radiator was full, the overflow tank was on the low side. Lately, the car has been rough on startup, it kinda spits and stutters when cold but quickly runs normal after a short while. Since the L1 plug was wet and I'm assuming it's coolant, wouldn't this indicate a failed housing o-ring? What part of the housing O-ring usually fails first? .... nearest to the spark plugs by chance? Anyway, any feedback you can give me would be greatly appreciated. Thanks!

 

Could be the o-rings in the intake if you're still running the stock intake that is. Are you running the beehive cooler or front oil cooler?

 

I know about the intake o-rings but if those were the bad how could it make my leading spark plug wet?

I've converted to a front cooler.