petrojeff

OK guys, I know something is not right. My 92 Ls 400 has a clacking sound when idling when hot. I rmemeber when my Dad had a V-8 when I was growing up and he said it was a lifter. I don't know what it it is. Do I have a valve adjustment made or what. I don't think it is anything bad, but I need to know what to do. Thanks in advance for your input.