1992 Maxima SE / Oil leak @ Cam Angle Sensor

[MaximumRPM]

I'm a proud owner of a 1992 Nissan Maxima SE and for some 11 years I've had this small but annoying oil leak issuing from the "Cam Angle Sensor" which is leaking onto my lower radiator hose. The question I'd like to ask is; "Is there a gasket on this Sensor? and if it is, will changing out this gasket interfere with the timing on the engine ? Will appreciate anyone's expertise on this matter