I've got an 02 Bean with 146k on it. Only major problem that had to be fixed was the Valve Cover Gaskets needed to be replaced a few months ago. The H6 I a great engine. Even with 146k on mine , it runs like a top!
Mine has 108,000. I got it with 104,000 and promptly changed the valve cover gaskets as they were leaking severely, but it doesn't lose a drop of M1 now. Runs pretty good, getting 22 mpg, cant complain.