Seal on KDR leaks

Moin from HH, I have been more or less happy owner of a V40 for a few weeks now. Since he starts off badly, I changed the spark plugs and cables and coils and in some kind of fit of stupid idea the KDR bolted to look at which it is. Now it is leaking, i.e., it only drips now, – after it was sprayed out in the high bow before, at the place where it is screwed into the pipe of the supply line to the ESD. I have used another seal meanwhile. (No originals of Volvo, had still one in the appropriate size.) The, which was installed, however, I also saved. Does anyone have an idea like me get it really dense? Ic dare not really drive me at the moment because of the petrol dripping. It is the 1.8 engine with 122hp, Bj 2001, automatic with 1783c. Thanks and VG from the north, Andreas