Originally posted by Rev. Po-Jay:
1. Hotter plugs burn out faster, right?
2. If it burns out it cannot melt a piston...


1. Not exactly. Yes it will wear faster dependant on it's heat range.

2. They have nothing to do with each other.

If a plug fails the cylinder gets saturated with un-burned fuel. That's not good for many components!

Also a hotter plug is much more susceptible to detonation! That's what burns pistons, cracks rings, etc.

A colder plug is less susceptible to detonation but is more susceptible to fouling out (see details in my last post!)

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.