2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

Spark plug question

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Old May 7, 2014 | 08:42 AM
  #1  
caneboy's Avatar
caneboy
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Default Spark plug question

Ok I have 145,000 miles on my original plugs. I havent noticed any difference in how my car has ran from day one until now but I think I was suppose to get them changed at 100,000 miles right? Should I get them changed even though I dont think anything is wrong and if I get them changed what kind and brand should I go with?
Old May 7, 2014 | 09:29 AM
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Yes, but it could be an expensive change, with that many miles it is almost guaranteed that some will break.
Old May 7, 2014 | 12:14 PM
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Default Plug change

Wow, gotta agree with Kevin. If you're going to DIY, better invest in the Lisle removal tool before you even start. If you're going to farm the job out, check around and find a shop that is familiar with this problem and has done them before.
If you're asking me for a recommendation on plugs, I'd say Champions. They are the only one piece plug I know of so this problem will not be a problem again in the future. Be sure that whoever puts them in puts the high temp nickel anti-seize on the smooth part of the "barrel" only, not on the threads. Also, stop about 1/4" above the firing end of the plug. If you get the anti seize on the electrodes it will short the plug out. Good luck.
Old May 7, 2014 | 12:43 PM
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I will take it to a Ford dealership
Old May 7, 2014 | 01:08 PM
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Noooo, Ford won't guarantee that they won't break any and YOU will be on the hook for repair costs if they do. AT $140+ an hour for labor plus how much most dealers charge for parts in general, that could get expensive real quick.

And Yes, champions! I've had them for 50K+ problem free miles.
Old May 7, 2014 | 01:54 PM
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Oh. I thought the dealership would be a safe bet but i guess not?
Old May 7, 2014 | 03:12 PM
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No, in fact, if you call them and ask how much they charge to replace the plugs in your car because of the known issue, they will probably tell you they're not liable either. At least a good service center will tell you (like mine did).
Old May 7, 2014 | 06:35 PM
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I have changed these many times on mustangs and f150 and have never had one break yet! the best way to change them is bring the engine to operating and change one bank,then bring the engine to operating temp again then change the other bank!
Old May 7, 2014 | 06:39 PM
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Originally Posted by Derf00
Noooo, Ford won't guarantee that they won't break any and YOU will be on the hook for repair costs if they do. AT $140+ an hour for labor plus how much most dealers charge for parts in general, that could get expensive real quick.

And Yes, champions! I've had them for 50K+ problem free miles.
I don't think any shop would guarantee they won't break any. And if they did break some you'd still be on the hook for the labor of extracting the broken bits.
Old May 7, 2014 | 08:39 PM
  #10  
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Originally Posted by charliebrown266
I have changed these many times on mustangs and f150 and have never had one break yet! the best way to change them is bring the engine to operating and change one bank,then bring the engine to operating temp again then change the other bank!
Awesome! Thanks for the tip.
Do you recommend Champions as replacements as well?

45,000 miles on mine thinking of doing this soon to get this out of the way. Sooner the better with these it sounds like.



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