Trooper distributor

Hello friends .... I turn to you again .... As you remember I have an isuzu trooper 2.6 this was losing oil for the distributor .... something that took it out to change the orring that I had bad and my problem is that now the distributor does not want to enter the distributor I lack as 1Centimeter ...... What will be tested everything so that it will be in good ... attentive to your advice and comments ........... thank you very much ....

I think he put a thicker or ring