Phr3d, i forgot to include pliers but we can use flat phillips screwdriver or even ginger nail to pry out these plastic retainers.

dkl, i did not apply gasket gel all the way round the cylinder head but only 4 places where they designed room for camshafts.

Miniz guy - yes there is no DIY for this in the article section. So it should help us to have one DIY in that section. If i have time, I will post DIY Engine belt, AC belt, pulley and tensioner + pulley in the forum tonight.

At first, I was thinking just replace spark plug but when I pulled sparks out of their housing, I saw oil on spark threads and washer so I decide to replace Valve cover gasket.

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BMW X5 2004 - 2005 MB E320
BMW 1999 528i/ 1998 Nissan PathFinder (sold)