1997 Ford Mustang spark plugs

WHITE COBRA

MEMBER
1997 FORD MUSTANG

Engine Mechanical problem
1997 Ford Mustang V8 Two Wheel Drive Manual

About 3-4 years ago, I installed the new G3 spark plugs and did not know I was supposed to use anti-sieze compound because I have alluminum heads. I have been worried about this every since. What should I do piror to trying to remove them as not to damage the threads while removing? I have been thinking about using WD-40 or a penatrating spray around the base of plugs before trying to remove. What would be the best method or product to try? Would it help to warm-up motor before attempting to remove the plugs?

More info: 1997 Mustang Cobra, plugs have only 2000-3000 miles on them. Every thing is fine with car, just want to quit worring about this!

2 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Usually new plugs come with some already on the threads, but in any case remove them cold and it should be OK do it now, 2000-3000 miles isnt that much, so I dont think anything is wrong yet.

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Sunday, January 3rd, 2010 AT 11:17 AM

MATHIASO

MECHANIC
1,209 POSTS

Hello _
merlin2021 is right, do not worry about it.
A standard set of spark plugs usually requires replacement after about 20,000-30,000 miles.
By the way the spark plug (for any aluminum head ) for cobra has plug shell made of a nickel alloy if you use your vehicle information when you bought them.(Do not use antiseize on nickel) so you did the right thing. Because it acts like a lubricant and may allow too much torque to be applied to the plugs, damaging the treads in the cylinder head.

For future use only :
With torque wrench 18 to 22 ft. Lbs. In aluminum heads.
When changing spark plugs, wait until the engine has cooled to remove the plugs.
Right now you're good.