Join Date: Sep 2004
Location: Medford, County of Jackson, Oregon, USA
Model: None at present
Has the head gasket been changed recently? If the bolt you're referring to is the small one under the head take a close look and see if you can see any gasket material protruding from the head/case joint. It's possible to reverse the head gasket front to back which does cause a major oil leak if the head gasket is incorrectly installed.
None at present
Past 'Wings: GL1100, GL1200, GL1500, GL1800
Current BMW C650GT