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Note that the other 7-series cars may have different top ends because of the VANOS changes that BMW made thru the years. I’d highly recommend you read this procedure in its entirety (Steps 16 & 17 in particular) before you commit to anything that may leave your engine open for several days. Tools You’ll Need, Disposables You’ll Need, Parts You’ll Need. Procedure: Passenger Side. Remove the cover from the top of the engine. To do this, individually push down on one of the four buttons while lifting that corner. I used the back side of a Sharpie (felt pen) to push the buttons without scratching them. Remove the two small square covers from the black plastic BMW logo’d cover. (This cover hides the ignition coils and spark plugs.) I used a small screwdriver to pry them off. Remove the two bolts with a 10mm socket. Slide the metal clips forward to unlock the wires from the coils. Remove the 10mm nuts from each of the coils and pull the coils out from the engine, disconnecting the wires as you pull. Note that the coils connect to the spark plugs by simply pushing up against them with spring force. Clean your engine as good as you can to keep junk from falling inside once you remove the cover. Blow the engine off to clear any dirt or other chunks. Carefully apply Gunk engine cleaner (or equivalent) around the outside of the valve cover, trying your best to avoid all things electrical. After letting Gunk soak for 15 minutes. To remove the clips, cut the long straight section out of a coat hanger and sharpen one end. Visually locate each of the four clips by looking down between the wiring box and fuel rail (the 1” diameter silver pipe).
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