Oh, come on, aircraft do not run the equivelant of 100K miles without someone removing or retorquing them. Not to mention the difference in humidity, operating temp range, plug design, etc. Apples vs. oranges. Got any service manuals for a piston-engine Cessna? How often are you supposed to check things that involve removing the plugs or heads?

I've run plugs in aluminum heads for 20 years - they always needed to be re-torqued once in a while, usually by the next tune-up.

I'm not saying it's not a bad design, but it can be mitigated by checking the plugs once in a while.

And like I said, I HAVE heard of problems with 460's, and if we had a nation-wide (and then some) forum to discuss problems, there would seem to be a design-flaw when there wasn't one.

Case in point: My brother-in-law with 90K miles on a 300 I6 spun a main bearing, without ever neglecting the motor - so even the bullet-proof I6 can have bad days... get 5 people in the world on this board to complain about spun bearings in an I6 and suddenly it's an epidemic.

art k.

Wern't the V-10's that blew plugs the '99 and '00? I thought the made more threads in the heads on the latter V-10's taking away the problem. Seemed like the first years didn't screw into the head enough? Or was it that the plug didn't have enough threads? I thought the '01+ were good to go?

Had a '69 429 and '77 460 and have '83 460. I never heard of plugs blowing out of either one.