I took my old downstream o2 off and its totally stripped (previous owner)so i cant thread new one in. So far nobody has a bung in stock for me to weld in, is it possible to weld a nut on from hardware store or are they too deep for it to work?

 

Probably too deep. Its gotta be in there far enough to get an accurate reading...otherwise there's no point really.

 

Are you following me to threads, haha. I thought that but figured id ask i just want it done and dont want to wait three days for it to ship, ill call exhaust shops in morning they gotta have one

 

Did you try NAPA? They have always had them for me.

 

Our napa closes at 5 so i can never get there after work but ill call them and have my wife pick it up. Is it just our old owner or do most napa stores close early?

 

Ours closes at 8 in the summer and 7 in the winter, on weekdays that is.

 

Ours isnt even open on sundays and i think close at noon saturday, crazy isnt it.

 

Any exhaust shop should have a boxful of HEGO bungs - they're almost universally threaded M18-1.5. I'm fairly sure that all of the Jeep HEGO units are threaded like that, it's very rare that a sensor has a different thread.

I wouldn't go with a nut, unless it's a jam nut. And even then, I'd cut the old bung off first before I welded a new anything on - just to make sure the sensor tip protrudes fully into the exhaust flow.

 

^ Grinding the old one down to a sliver and welding a nut cut in half works. Almost more trouble than it's worth though.

 

Machinist at work made me one this morning, i had pipe left from my muffler install welded it into that and just going to cut old o2 area off and weld in new pipe. Slow work day haha

 

A jam nut is a half height nut - but you'll still need to burn the zinc off of it to get a good weld. Grind the old one off and buy a bung at your local exhaust house - or, if you have the manifold off, take it and a half-slab of beer in and ask them to do it for you (probably be the easiest thing they'll do all day. I've had plenty of work done this way - "I need a stub welded on this flange. I've got the stub, here's the flange, what do you want to drink?" Even shops are amenable to easy gigs and "free" beer...)