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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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#1
Sun, July 26th, 2009, 07:03 PM
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Changed spark plugs
Hey there, did the plugs in my truck 2day. 04 F150 4.6L 74k miles all in all it was pretty easy, took about 1 1/2 hours total after reading threads about the plugs breaking off i was kinda worried but im guessing that issue is on the 5.4L only?
Just figured id share my plug experience lol! Also hoping to get my gryphon next week had to make sure the plugs were up for the challenge you know? 
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#2
Sun, July 26th, 2009, 08:22 PM
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Yep..it's a 5.4 thing. I think they redesigned the heads on the 5.4 somewhere around 07 to help with that prob. I actually think the breakage prob affects all the 3V engines in the 04-06 range, this includes the v10 also.
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 2008 f150 supercrew, 5.4, 3.73 LSD, tonneau cover, 275-65-18 BFG's. Gryphon programmer. XLT with XTR package. Tinted heads and tails with 8000 HID's. 4300 in the fogs. Gott's Mod. Painted grill.
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#3
Sun, July 26th, 2009, 10:14 PM
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Yea it was only on the 5.4's but they actually changed the heads at the end of 07 which means it only took affect on the model year 2008 trucks. But good job on getting them changed anyways.
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#5
Mon, July 27th, 2009, 12:08 AM
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Good on you, Jon!
 I keep hoping Motorcraft will come up with a one-piece plug before I change mine. I really don't want to put two-piece plugs back in. - Jack
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 2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam
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#6
Sun, December 13th, 2009, 11:54 AM
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I did my plugs 3 weeks ago. I bought the Lisle special tool before I started. Broke the last plug. What a great tool! It worked so sweet!
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2005 FX4...Stock with a Gibbson dual exhaust 2010 Fore Edge SEL AWD 1969 Camaro SS 1971 Impala Sport Coupe
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Flowmaster 40, PHP Gryphon, AS 2" kit
Hybrid Mode
