Here's a nice document on taking the valve cover off to inspect your VarioCam bits (starts with a foreword on VarioCam, with instructions starting on page 4).
And with pictures.
http://www.evernote.com/shard/s20/sh/1bdd37df-b23b-43eb-bb12-72f10eefe2fa/e12ca0bad7fc1d6789987d77275e754a
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