Tune-up before a 2,200-2,700 mile road trip to the middle of Wisconsin/Minnesota (depending on what we end up doing). Done several trips to FL and back but this will definitely be the longest trip in the truck and at 525,000 miles no less.
Doing:
Valve cover gaskets (Fel Pro kit)
Tube seals (these were either original or the whole cover had been replaced because the tabs had clearly never been bent back for replacement)
Spark Plugs (Denso TT)
Coils/boots and springs (Denso/Beck Arnley)
Both upper ball joints needed replacement (boots ripped and starting to creek), decided to do lower "while I was there" (Moog/555)
bearings grease and repack
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pretty clean for 525K miles actually, been using BG EPR in the crankcase each oil change, not sure if that helped clean it up. I had incredible luck with this, every bolt came out, nothing stripped, broken, or stuck. Plugs were just as they should have been, the rear most coil was the only that didnt look good, seem to have some heat marks on it.