Joined: Oct 2018
Location: Chattanooga, TN
Catalytic Converter Heat Shield Bolt Head Rounded
I got started taking the catalytic converters off our 2003 Pathfinder today. I got the exhaust with the muffler and rear cats loose and one rear cat off. Taking the heat shield off the front passenger side cat, all the 10 mm bolts came out except for one bolt and it was in the hardest place of all to get too. It is about 9 inches up in there and on the back side of the front converter which is about an inch from the firewall.
The bolt head rounded, I was using a 10 mm gear wrench that is all that would fit in there. A regular 10 mm might have worked but no way to see the bolt to remove that way. I have tried to rip the heat shield off with no luck, that sucker is double thickness. The only thing I can think of is to make a long chisel and cut it off. I have an old star drill that I can sharpen and use as a chisel, that is about all I can think of. Maybe make a wedge that will fit each side of the bolt from under the shield, like a ball joint wedge. Any suggestions to get it off?
Question, I can see inside the back side of the front converter, it is snow white on the back side, is it usually dirty looking if bad? Also two of the 02 sensors were only finger tight, aren't they supposed to be tighter than that?