Anti- sieze on NGK TR55 plugs

[Jeff Stout]

I understand the anti seize because of 2 different metals, but I thought that it enhanced poor grounding of plug to head. Maybe I dreamed it.

[bykr]

Originally Posted by Jeff Stout

I understand the anti seize because of 2 different metals, but I thought that it enhanced poor grounding of plug to head. Maybe I dreamed it.

In theory maybe but there's plenty of metal to metal contact at the gasket area.

[e vassar]

Originally Posted by bykr

In theory maybe but there's plenty of metal to metal contact at the gasket area.

Interesting theory....
Since spark plugs operate at a very high voltage 40K volts or more?...but very low current something measured in miliamps . A very small contact area with the head should be enough grounding....In theory...would like to hear more on this ...these plugs have a tapered seat and no washer to compress. When the seat hits the head...thats it..they dont really turn after that. I dont see how they can be over tightened without causing severe damage. So im going to theorize (again) that the plugs were so hard to get out because they have been in there awhile, and no anti-seize was used.

[Jeff Stout]

Originally Posted by e vassar

Interesting theory....
Since spark plugs operate at a very high voltage 40K volts or more?...but very low current something measured in miliamps . A very small contact area with the head should be enough grounding....In theory...would like to hear more on this ...these plugs have a tapered seat and no washer to compress. When the seat hits the head...thats it..they dont really turn after that. I dont see how they can be over tightened without causing severe damage. So im going to theorize (again) that the plugs were so hard to get out because they have been in there awhile, and no anti-seize was used.

You saying taper seat plugs on aluminum head? Didn't think that was possible.

[Jim Caughlin]

After ripping the threads out of my alum head from a seized spark plug, I'm not inclined to put in a plug without anti-seize again. Incidentally, happened at a divisional race 1000 miles from home so not the most opportune time for it to happen.

Jim Caughlin
SS6019

[KRatcliff]

Originally Posted by Jeff Stout

You saying taper seat plugs on aluminum head? Didn't think that was possible.

Taper seat plugs are what we use on our LT1 and LS1 aluminum heads.

[Jeff Stout]

Originally Posted by KRatcliff

Taper seat plugs are what we use on our LT1 and LS1 aluminum heads.

Thank you. Learned something new

[Dissident]

Biggest problem with anti-seize is that folks tend to slop it on instead of using small amounts per the mfg's instructions.
Regards,
HB2
Dissident