my 94 f 250 4x4 351w needs the spark plugs replaced I bought new ones today and the old plug s are rusted in and I cant get them out.I even sprayed pb blaster on them and let them sit for a few hours and still cant get them out.I only have hand tools no air tools how do i get the old spark plugs out with out breaking them off?I cant afford to take it to a shop need some help here oh and the fuel filter doesnt seem to want to come off to.any info will help thanks

 

Try running the engine till hot, put on some welders gloves and try again to remove them

 

Thats what I did for mine and I had no issues. Just make sure when the new ones go in anti-seize is you friend.

__________________________________________________ _________________
1997 Ford F250 HD 351 Windsor
197,000 still strong.

 

With the engine warm, take a 1/2 drive deep socket that fits over the insulator only, (does not fit over the hexagon portion). Then add an extension and strike the end of it with a good sized hammer (can be hard with all the accessories in the way). This shocks the threads and hopefully will crack the rust. Add more pb blaster and try to spin them out.

If it doesn't work.... Try A Bigger Hammer!

 

don't forget that rust is holding them in place and stupid as this sounds try tightening them too... back and fourth tention both ways eventually breaks them free for me. All to often we want them off and only turn one way... turn both ways to break the rust. After heating the engine of course.

 

I had this exact same issue, i used SeaFoam Deep Creep penetrating lubricant and waited a lil bit and they came out nice and easy and mine were rusted really really bad in there

 

Hi folks, how much penetrating oil are we talking about. I've read in other threads the danger of Hdrolocking the engine if you use too much. My 97 HD hasn't had the plugs changed ever from what I can gather so that's in the near future. Thanks for the tips. Keystonepaul

 

whatever amount it takes to break them loose! Hydrolocking is when a non-compressable liquid gets into a cylinder. The volume of the liquid has to be greater than that of the combustion chamber. When you get gas, air and water into the combustion chamber and the total compressed volume of the three is greater than the size of the combustion chamber then you have problems because the piston can't complete it's full travel or revolution (bent/broke rod)... Will this happen with some penetrating oil to get the plugs out... 99% Not a chance!

Most of the time this happens with carbed engines flooding, people diverting their after market air intake too low in the vehicle and going through water, or a head gasket failing and dumpiong water into a cylinder.

A tiny amount of penetrating oil will not cause hydrolock! Besides that most penetrating oils are just that... oil... If you get some in the combustion chamber is will be like have a leak in your piston ring... you'll burn up the oil in the combustion chamber and blow a little more smoke out the exhaust for a minute... Got it now????

 

Now keep in mind I didn't say spray the spark plug threads down to clean them either... we are just talking about using penetrating oil with the plugs still in the engine... Kinda have to use some common sense and not fill your combustion chamber with a bunch of crap...

 

Thanks, I'm following you. Good description/explenation of what I asked about. Have heard it used more than once, but never explained in my short time here. Thanks for taking the time. Keystonepaul

 

Heres a question. Did you get em out yet??

 

PB Blaster. Learn it, know it, buy it, use it...........

 

i got them plugs out ugh what a job took me 2 days of soaking them with pb blaster 3 times a day and working at them slow back and forth.im just glad I didnt break a plug in half.thanks everyone for your help.

 

just wondering where can i by sea foam?

 

Advance Auto and AutoZone both carry it, i used it on mine, after i broke one, and they came out real easy