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Old 09-07-2007, 07:54   #1 (permalink)
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Question Changing plugs

I have a 97 Expy and I want to change out the spark plugs. It looks like I have to tear apart most of the top end just to get to the coil packs. It is a 5.4 and I am wanting to get it running it's best being right now I only get 11 miles to the gallon. Any help is appreciated. Thank you.
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Old 09-07-2007, 23:05   #2 (permalink)
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Re: Changing plugs

You are aware that this is the engine that is blowing spark plugs out of the head, right? That means you have to be VERY careful when removing the old plugs. Ford advises that you soak the plugs with a rust penetrant (PB Blaster or FreezeOff) and let it sit for at least 15 mins. Then loosen the plug 1/8 turn. Soak some more and then turn back in before you back out 1/4 turn. Keep doing that back and forth until the plug comes out. Make sure you apply anti-seize on the new plugs and USE a torque wrench to make sure you apply only enough torque to hold them in place. Too much and you'll strip out the threads. Not enough and they loosen up and blow out.

P.S. reduce torque by 10% when you are using anti-seize.
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Old 09-08-2007, 06:12   #3 (permalink)
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Re: Changing plugs

thanks again rick for your help. i was unaware of the blow out deal, but that only helps once i get to the point of taking them out. i still need to know what i need to do about getting to them. can i leave the fuel rail in and such. looking for more detailed instructions on removal without having to buy the book. thanks again.
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Old 12-10-2007, 15:37   #4 (permalink)
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Re: Changing plugs

Here's a step-by-step tutorial I made when I did mine. Hope it helps.

Ford Expedition or F-150 5.4 Triton Spark Plug Change
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