You posted in the wrong section. Please read the description before posting if you are unsure. Moved to the MKIII discussion area.
The galley cover acts as a seal for those allen shaped plugs. You could try some RTV to seal them up.
Make sure you don't over torque the valve covers or you will crush the new seals and they will leak. The torque spec is 22 INCH pounds... that's just a bit more than hand tight for most people.
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