Bujias of an Impala Chevrolet

Hello again ... I still can't start my Chevrolet Impala but I think I already cause it, I was checking the spark plugs and I realized that I spark only from time to time ... I check the lid where they leave and had a little hole near where the bolt that holds it goes, try to buy it but I could not find it replacement. So I seal the hole with magic putty but I really do not know if it will be ... what do you think