Spark Plugs platinum vs iridium

[127.0.0.1]

don't put dielectric grease inside the plug wires.

the grease doesn't conduct electricity, and for a large pulse
like a plug has, it can restrict it a bit (less metal-metal contact)
and overheat the wires.

dielectric is best for low voltage...like ordinary 12v or 5v electrical connectors
elsewhere in the vehicle that may be splashed with water, snowed or slushed on...

[1stToyota]

That's funny because some new ignition wire sets come with the dielectric grease already pre-applied in the boot. And almost all of them throw a pack of dielectric grease into the box. And I always thought it was designed to dissipate heat, not cause a build up of heat. A little applied to the insulator saves the knuckles, and maybe the wire, when it comes time for the next tune-up.

[127.0.0.1]

Originally Posted by 1stToyota

That's funny because some new ignition wire sets come with the dielectric grease already pre-applied in the boot. And almost all of them throw a pack of dielectric grease into the box. And I always thought it was designed to dissipate heat, not cause a build up of heat. A little applied to the insulator saves the knuckles, and maybe the wire, when it comes time for the next tune-up.

ok it depends on the type of grease. there are a hundred types.

some dielectric grease makes better contact or allows closer mating of metal to metal. in a plug boot, with some types of grease, there will be a bit less contact, and if the voltage has to squeeze through less contact surface area, it could heat up more than normal. it can also cause small arcs and burns if the voltage is great and the contact small. that is what I meant.

[yaris-me]

Originally Posted by 127.0.0.1

don't put dielectric grease inside the plug wires.

the grease doesn't conduct electricity, and for a large pulse
like a plug has, it can restrict it a bit (less metal-metal contact)
and overheat the wires.

dielectric is best for low voltage...like ordinary 12v or 5v electrical connectors
elsewhere in the vehicle that may be splashed with water, snowed or slushed on...

Should people use anti-seize compound between the threads and the head?

[127.0.0.1]

Originally Posted by yaris-me

Should people use anti-seize compound between the threads and the head?

there is a lot of conductive metal in most anti seize

plus there is much more metal-metal due to the
available surface area of the threads

[Yaris Hilton]

Yes, you should use it. You don't want a stuck plug.