Changing spark plugs
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Texas A&M Aggie
Joined: Feb 2013
Posts: 7,527
Likes: 1,353
From: Pasadena, TX
Alright having owned one, and having broken only one plug I'll chime in here.
My process from what I had found online. Run a tank with a good complete system cleaner in it (I used Gumout). Once that tank is empty, remove your coils and boots. Loosen the spark plugs 1/4 turn, then spray liquid wrench or some other kind of penetrating oil in all of the holes with the engine warm, NOT HOT. You should be able to touch the engine without burning yourself. Let that sit at least overnight. The next day you'll want to put an impact wrench on it and get after it. Once it starts turning it will make some awful noises but DO NOT STOP. If you stop and restart it will break.
I used that method on mine at 125,000 I believe. We broke one plug (at the back under the computer). When we looked at the batch numbers, they all matched except that one and it looked a lot older. We suspected the previous owner had replaced 7/8 of the plugs. I advise buying the Lisle extractor tool (check the classifieds here) to have on standby in case you break one. We didn't do that and had to wait about 4 days of the truck sitting in the driveway.
My process from what I had found online. Run a tank with a good complete system cleaner in it (I used Gumout). Once that tank is empty, remove your coils and boots. Loosen the spark plugs 1/4 turn, then spray liquid wrench or some other kind of penetrating oil in all of the holes with the engine warm, NOT HOT. You should be able to touch the engine without burning yourself. Let that sit at least overnight. The next day you'll want to put an impact wrench on it and get after it. Once it starts turning it will make some awful noises but DO NOT STOP. If you stop and restart it will break.
I used that method on mine at 125,000 I believe. We broke one plug (at the back under the computer). When we looked at the batch numbers, they all matched except that one and it looked a lot older. We suspected the previous owner had replaced 7/8 of the plugs. I advise buying the Lisle extractor tool (check the classifieds here) to have on standby in case you break one. We didn't do that and had to wait about 4 days of the truck sitting in the driveway.
Senior Member
Joined: Oct 2017
Posts: 491
Likes: 36
From: Bridger, Montana
I just bought a 2006 with 121,000 miles on it. All 8 plugs broke so I'm waiting on my Lisle extractor tool from Amazon. I saw an interesting tool online but I can't remember the name. It's a plug socket but it also grips the porcelain so they both have to turn.