> What's your take on Scott's suggestion?
> 
> I know the some of the head bolts aren't all that easy to get to ... so
> maybe every oil change is too frequent. But I'm thinking once a year might
> be a heck of a lot easier and cheaper than replacing the head gaskets or
> even the heads.

I was thinking the same thing. The problem I think you'd run into is
that, unlike a "reg'lar inline type" engine head, the wasserboxer
actually uses the contact face of the head nuts to seal off the
cooling system. I also think that fiddling with 'em every oil change
would be too often, possibly disturbing the sealant too much. I'd hate
to have a preventative measure turn into an unseen coolant leak into
the lubrication system under the valve cover! Perhaps it might be
possible to do a "loosen, apply new sealant, retorque" without too
much difficulty when you've already got the coolant drained for its
annual or biennial change. What has me curious is WHY some
wasserboxers lose their head nut torque. From the sound of it, ALL of
those Alfa Romeo's had issues with losing torque; but it seems like
only SOME wasserboxers have trouble with that issue. The 'boxer I
pulled out of mine was the original engine, had the head gaskets at
80K by the dealer, and it had at least 80K more on it before it "died"
of a snapped head stud. Other folks are STILL driving around on their
factory engines with not apparent trouble...