The plugs I just replaced had no anti sieze on them and they were a PITA to get out. Im lucky I didn't snap them off in the hole. I put anti sieze on the new ones and will check them in a few days to make sure there still tight.

 

You better hope the antisieze does not help them spit out. Were the ones you removed Motorcraft? They are supposed to be nickle coated and not require antisieze.

 

They will not work out if torqued correctly even with anti-seize. You just do not need anti-seize with the Motorcraft and Autolite plugs.

The anti-seize on the 3V motors is not used on the threads. It is used on the ground sleeve to prevent carbon build up that would cause broken plugs.

 

They blow out because of two things; not enough threads and factory torque spec was too low. Ford said 13 -15 ft/lbs. Recommended is 28 ft/lbs.

Anti-seize will not cause a blow out. Incorrect torque will.

 

They were Motorcraft. They didn't seam to have anything on them but gunk in the threads. They were in there really good and didn't want to come out with out a fight. lol

 

What did you torque the new ones?

 

tight + 1 1/4 turns. lol the first thing I remembered after I got the first plug out is my torque wrinch was sitting on my desk at home. I'll torque them down tomorrow. I have to do a trany filter and an oil change any ways.

 

Oh lordy - I do hope you haven't deformed the threads in the head!

Refer to this: http://www.densoiridium.com/installationguide.php

So - approx 1/16 turn past seated on a 14mm tapered plug seat (what you have) nets you in the range of 7-15 ft-lbs, unlubricated.
And hence - about 1/8 turn total would get you into the current ~28ft-lb sweet spot - again, without any lubrication.

It follows then, that 1 1/4 turns is gonna be WAAAAY over-torqued.

Good luck.

MGD

 

I must have hit the 1 twice, my bad. I only went a 1/4 turn. I know there aluminum heads and I didn't want to mess the threads up.

 

You took 5 years off me life, ya bum!




MGD

 

I stopped in after work and torqued them down. I had them at 20-22 ft-lbs. I put them all at 28. Why I was at it I did an oil change and trany filter. The 10 day forcast calls for snow so I needed to get it all done.