If i wank a day after workinng out will it have any effect (e.g.musclar gains or endurance levels?

Depends: It depends on how often and how vigorously. For some people wanking is an aerobic and strengthening activity, because of the effort and positions involved. Some people have reported here that they experience muscle and back pains afterwards, and the assumption is a fair amount of exertion/contortion/repetition were expended. But generally, a normal wank should not affect your training.