At 03:25 PM 2/29/2000 +1100, you wrote:
Hi all,

Just wondering if anyone can shed light on the cause of this mysterious
noise my Waterboxer has recently started making.

over the last month or so I
have been aware of a mysterious "thump" occuring once when the
vehicle has been idling in the driveway after a decent run or just after
I turn it off in the garage.
It is probably best described as sounding like someone giving one of
the metal panels a gentle thump with the side of their fist.
__________________________

Had the same mystery - finally traced it down to the rear brakes after
engaging the emergency brake; something - a shoe maybe - was binding
slightly then releasing. See if applying/releasing/reapplying the E brake
stops the sound.

Austin