I just bought a 92 F150 with a 300 I6, it has been missing so im changing the sparkplugs and the wires while im at it, the old sparkplugs are so rusted i cant unscrew them, ive already tried WD40 and PB Blaster, sitting over night, ive even broken a ratchet on one, given it was a cheap tool, but still. any suggestions?

 

Soak them longer . If you have a butane torch heat them before you try to remove them. heat helps.

 

X2 what he said. You can also try running it a bit to heat them up and keep soaking them.

 

I had an old boat racer teach me a trick many years ago. he used heat adn then dripped candle wax near the thread, The wasx would melt and run down the threads. The stuck bolts usually came out nicely after that. Told many people about it, Most dont belice me till they try it.

 

That's a neat trick. I will give that a shot on a stuck bolt next time. The g/f has candles EVERYWHERE!!!!!!!!!

 

Most gals do, I dont understan thier infatuation with burning candles.

 

thanks yall, im gonna put some pb blaster on tonight and try it tomorrow afternoon, found my craftman ratchet so well see how it goes.

 

keep in mind bolts turn two ways... Get a 1/2in drive (or cheater bar) for more strength and leverage on those and work them both ways. Most people break spark plugs (and bolts) when they are only working them one way. Rocking a bolt back and fourth is just as effective to slowly break the rust free. I'd suggest a impact but am guessing you don't have access to one... And for those who want to flame me for using a impact on spark plugs... well if you turn down your pressure low enough you get a rythmic hammering to help break them free (tightening and loosening of course).

Melting candle wax into the threads works well if you can get the wax in... Harder to do when the threads are inside a head...

Oh and the PB blaster isn't helping you b/c spark plugs have crush washers on them to seal the spark plug to the cylinder. IE: you have to loosen the spark plug some for penetration fluid to be able to fall into the threads (or wax for that matter). Tightening the plugs a little and then backing them off will compress the crush washers a little more allowing a gap for penetrating fluid also.

Best of luck and let us know how it goes!

PS: if your in the mood to invest in another tool a long handled flex head 3/8 drive rachet works great for this... More leverag and angles to allow more torque to be applied in a more comfortable position. Sears part number 44815

PSS: don't forget to use a little anti-seize with copper in it when reinstalling the new plugs.

 

thanks, its been raining lately so im parking her under a car port tomorrow afternoon and ill let it sit tomorrow night and thursday and then just start working at it, cant believe its taking all this just to change the spark plugs.

 

The heat from the butane torch draws the wax into the threads.

I was skeptical till I used it to get a frozen diff fill plug out.

 

use some anti-seize with copper on the new plugs and you'll never have this problem again...

PS: the wax trick works but for those suggesting it I want you to look at my previous comments (crush washers will keep wax out), and how the HELL would you get wax in on the threads of the spark plugs on this head?????

 

i tried again today and nothing has changed, i think im gonna have to take it to my friends shop so he can use his impact gun, any other ideas?

 

make sure he turns the air down to 70-80psi to start with and then go up from there... no sense in breaking one off!

 

nope! thanks for the help ill post on here the results.

 

got it pretty much done, have every single one changed. screwed and unscrewed each one repeatadly until i had a break in the seal and used some pb blaster, let it sit for a afternoon and every single one came out with some effort except the front one, it is stripped and is impossible to use a socket, taking it to a shop on tuesday to get that one out. thanks for the help yall.