today i changed my spark plugs on my 94 325is. i noticed on one spark plug and boot that oil had leaked into the spot? anyone know how or why and how bad the problem is? the ony thing i can think is that it is a seal somewhere but not sure which one if thats it?
It's the valve cover gasket you need to replace. I'm about to change my plugs for the first time and ordered the gasket just in case. It's not an expensive part-about $30. I bought mine from pelican parts: http://www.pelicanparts.com/bmw/catalog/shopcart/BE36/POR_BE36_ENGcyl_pg3.htm#item13 There's also a diy on the site for replacing the gasket.
Common problem with older vehicles. It's your valve cover gasket. Here's what I did to fix it: http://www.dvatp.com/bmw/diy/valve_cover_gasket/ -Doug