Cluster

Hey whats up guys I recently change my speedometer because the old one was melted do to electrical problems that are now fixed but the isue now is that when I took the cluster out I noticed that my gas gauge is not working and all I tid was tighen up the small 3 bolts behind it they where some wat kinda snuged so I just snuged them up a little and after that the gas gauge stop working. you think I should get a new gass gauge or is there some other things I should consider checking before I do decide to get one?