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ORIGINAL: muddyfuzzy

i have had mine apart several times and have come to the conclusion that the design for the cover flange in not adequate.  idealy, spacing should be reduced and a couple more fasteners added.  the flange is not substantial enough in my opinion to provide the needed clamping pressure with the current configuration.  it is important to snug the cover down equally(not unlike a tire) to ensure proper seal engagement.  I use bel-ray grease instead of silicone but either is fine.  Also, be very careful not to over torque the screws.  If sealed and installed properly the cover will work just be careful when doing so.  I would not put water in my housing but rather cap off the exhaust snorkel and provide a little pressure with a air compressor while spraying the sealing surface down with soapy water.  When you see bubbles you have found the leak.  Good luck.