93 ford tempo rattles again!

I changed the harmonic balancer in my 93 ford tempo but the rattle came back!! Last night we tightened the bolt on it with 700 psi but it’s still rattling! Could it be a bad balancer or another part that is lose? It rattles at idle and goes away while driving. It just started again the day before yesterday (I thought my husband was just looking to play with the car more) and by last night it got really loud. It’s a deeper rattle then the rattle it had before we changed the balancer. Could there be something way out of balance that is causing the balancer to do this? Please help I love my hunk of junk and don’t want he going to the junk yard :frowning:

It seems to only do it while the heat is on