Registered Forum User
Ducati Corse
Posts: 3,134
Join Date: Jan 2002
Location: notts
Mood: Bloo and Yellow.. and Red now ;)
The filters leak if they are put on dry. You need to smear the seal with engine oil before fitting it.
Chances are, the seal will stay stuck to the cases when you remove the filter.
They don't need doing any tighter than hand tight when replacing them.