Spark Plug Replacement

nm9stheham said

That setup is counting on the tube as the gasket. Put some antisieze on the base of the plug to help keep from brinnelling the tube.
BTW, I never have looked to see why removing the gaskets is a good idea. It may be that keeping them in partially defeats the long reach of these plug tips.....

Click to expand...

The first time I read about removing the gasket/washer was on slantsix.org and the article was written by who else but SlantSixDan. I can see the reasoning for removing them on the stock Champions to get the spark out into the combustion chamber more. There's plenty of room on a 225 with the piston stopping .17/.18 short of the deck. He flat out states that the NGK ZFR5N (3459) is the best plug to use for a slanty because it moves the sparkler out into the mixture more.

I don't know if that was the official Chrysler stance or not. It my be just a recommendation by SSD based on his experience.
I have a 68 FSM here at work and under Tune-up it says:
"Clean or replace spark plugs as necessary and adjust gap to .035 inch. Tighten to 30 foot-pounds."
It's been my experience with Champions that the plugs come out of the box ready to go. If it needs a gasket it's there. If the gap needs to be .035, right on. (I still check)
Maybe I'll drop a line to Ehrenberg, he's good for tracking that kind of stuff down.

But I was wondering because the sealing area is a lot smaller than the bigger plugs if anyone had problems tearing up the bottom of the tubes?