2008 Ford F150 4.6L w/ 188,850mi valve cover gasket replacement. I recommended changing the valve cover gaskets before doing an oil change since there were puffs of smoke coming from the engine. Wetness around the covers and 2 year old Dorman intake manifold from oil leakage from the valve covers. Not a lot of DIY videos on the 4.6L so some of the pics could be helpful.
Starting with the driver's side. The EGR tube will be troublesome in this side.
Intake, P/S bracket, harness, EGR tube will need to be removed/moved out of the way. I've completely removed the EGR tube. Valve cover bolts will be a mix of regular bolts and studded bolts. I didn't remember the exact location, all I know the studded bolts correlate to the wiring harness holders.
The EGR valve side of the tube goes a way in into the valve. Trying the no hack way by removing the EGR tube from the manifold. Plan B is to unbolt the valve from the intake manifold and bend the living bejeezus out of the tube.
#nohack. Deep Creep + MAPP Gas * Long Adjustable Wrench + Breaker Bar = Got the exhaust manifold side of the EGR tube loose. Ignore the typical Ford fender rust.
That's gonna smell when that Deep Creep gets burnt off.
Clean for 188,850mi. Pennzoil Platinum High Mileage 5W20 and an STP Extended Life oil filter (the VatoZone especial) every 6 months per the owner.
Crusty original gaskets.
Replaced with Fel-Pro gaskets. Includes grommets for the bolt washers. The washers are flanged with torque stoppers on the bottom end, make sure the bottom of the washers go over the tangs in the gasket to lock the grommets and perimeter gasket to the cover.
Don't forget to put a dab of RTV on the timing cover - head mating area.
Drivers side installed. There is a single 13mm bolt that goes on the bottom left of the valve cover. Put it back in the same place I'm sure the Feejord engineers did that for a reason. Slather anti-seize on the EGR tube fittings for the next guy (you) for future removal.
I thought the driver's side was hard but the passenger side is worse. Screw discharging the A/C you'll be fighting that hard line. Remove the front ignition coils and get most of the harness out of the way because two coils were the casualties trying to worm the cover out. Remove the battery for more room and disconnect the large harness from the ECU that drapes over the valve cover and bungee it out of the way. A plethora of extensions, wobbles and u-joints help but an 8mm 1/4" long socket & small manual ratchet wrench gets into those tighter spots easier. Installation is the reverse of removal, watch the wiring harness and ground strap running behind the head though.
Performed the oil change (with the same VatoZone especial). Changed out a failed Dorman thermostat that came with the intake manifold replacement where I kept seeing coolant temps hitting 213F prior to starting this work with a Motorcraft t-stat (now seeing 188-192F coolant temps) and topped off the washer fluid reservoir with a Sonax concentrate mix to 1 gallon of water.