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5.4 3v or 4v in 2003 Lincoln Navigator?

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04-20-2010, 09:37	#1 (permalink)
jagb2507 Registered User Join Date: Oct 2009 Posts: 7	5.4 3v or 4v in 2003 Lincoln Navigator? I have a 2003 Lincoln Navigator and was wondering if my engine is the 3v or 4v.. as I was going to change the spark plugs... and wanted to make sure I didn't have the engine where the plug heads break off... thanks!!

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04-20-2010, 13:00	#2 (permalink)
Bert 2002 F150 XLT Join Date: Nov 2008 Location: Oregon Posts: 9,110	Re: 5.4 3v or 4v in 2003 Lincoln Navigator? The problem occurs on 2005 and up. Here's the bulletin that covers it. http://www.saac-mcr.com/main/2008_TS...park_Plugs.pdf __________________ Bert

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