Hi All,

I just wondered if you use anti-seize compound on sparkplugs when put into an aluminum head? What torque values do you then use? THANKS!

I use anti-seize.

The torque value is 15 ft-lbs.

I ALWAYS use anti-seize on sparkplugs.

Copper anti-sieze.

Thanks for all the reply's!

Yes, just to add to the consensus: Copper anti sieze and roughly 15ftlbs.

 

I have stopped using my torque qrench on plugs cause off access problems on my IMpreza - old Legacy was better. I tighten with an eight inch handle and stop when i feel "resistance". Don't force them.

 

Of course if they are too loose they cannot dissappate the heat.

No.

and the application. Some plugs antisieze is not reccomended with. I like to buy reccomended plugs from the dealer these days and use what the factory (not Haynes) manual says to install them with. I know this is not very adventurous, but it usually works.

Using copper on aluminum is an aerospace vehicle no-no.

I use oil from the dipstick on the threads. I dont use a torque wrench on it myself, as i have a claibarted arm but yes 15 ft-lbs.

 

 

nipper

i have a claibarted arm but yes 15 ft-lbs.

 

 

nipper

 

I have a calibrated arm too. But it's calibrated for mid-stroke speed.

Using copper on aluminum is an aerospace vehicle no-no.

Aren't the plugs steel in aluminum? Zinc anti-sieze would be better for corrosion, but it turns hard and crumbly in the heat. Maybe moly grease? I don't expect to get any corrosion in this dry application, I'll stick with copper.

Aren't the plugs steel in aluminum? Zinc anti-sieze would be better for corrosion, but it turns hard and crumbly in the heat. Maybe moly grease? I don't expect to get any corrosion in this dry application, I'll stick with copper.

 

The one I use only states thet it contains «petroleum distillates and aluminum» Its marketed by Permatex in a small gray plastic container and claims to protect any metal from corrosion and seizing at temps up to 1600 °F. I would trust that cuts the mustard.

If you use antiseize compound on your plugs, the Subary factory manual says to reduce torque by 1/3. BTW, this applies to any nut or bolt torque setting with antiseize or lubricant, not just the plugs.

and of course, to much anti-sieze could prevent the plug from properly grounding the current

Heres what I have heard, about anti seize,... Ive heard that it kills 02 sensors like no other... I have also heard many old timer mechanics swear by it... now I do trust old mechanics words but remenber... 350 chevys dont have 02 sensors..... Just my thoughts... I dont use it unless the factory manual says so... things "shouldnt"(baring the car has been in an airconditiond lab all of its sheltered life) Seize if the correct torque and not a smidge more is applied...

How much grease are you guys applying?

 

I smear a blot about 8mm in diameter on one side of the threads, avoiding the two top threads to keep the grease out of the chamber.