Oxygen sensor seal replaced & clamps on cat
I replaced oxygen sensor (one after 2nd cat) seal but story behind it, is wired. A week back, my truck start making rattle noise from underneath, when I was on signal. few days back I asked dad to put the truck in drive and push the brake (that when rattle sounds comes). I pushed my foot on second cat and noise was gone. So, I figured out it is cat heat shield which is making that noise.
The mechanic, I really like is about 1 and half hour from where I live. Somebody suggested my dad a new mechanic just 5 mins from us. My truck was requiring a oil change, so he took my truck for oil change and also to get suggestion on rattle noise. When he came back, he told me that mechanic suggested that there is issue with whole cat thing and requires 400+ to fix.
Yesterday, when I was driving, suddenly truck started making loud noise, which you get when your exhaust system is broken. I pulled over to check but noticed noting. So, after reaching the destination. I went under the truck and here is the picture of what I saw.
Now I have question. Is it possible for rusted nuts to break off or loose and fall off by them-self? (I don't believe that) or our new suggested mechanic made a excellent first impression??
So, did some cleaning there, replaced o2 sensor seal plus new nuts. Also put 2 big clamps on cat... but didn't test it. hope it is going to fix the rattle issue. I will check it tomorrow.