Dang It

[rkpyota]

Ok pretty new here. I have had some driveability problems as of late in my 2.7L 99 4runner. I went to replace the O2 sensors and one of the studs broke. Does this mean I need to get a new Cat or have any of you had any luck extracting the stud from the exhaust.

Thanks
Kevin

 

[Singtoe]

If you broke the o2 sensor bolt, more then likely, when you remove the cat, you will brake the exhaust manifold bolts too.

Drill out, tap and insert helicoil.

 

[thor999]

Don't know if this would have helped, but if you have some rust issues down there, next time you perform any maintenance douse the bolts w/ Kano Kroil or PB Blaster (latter can be had at Walmart) like twice a day for a week or so before attempting to remove the bolts. Learned this the hard way.

 

[rkpyota]

Well I just replaced the Exhaust manifold with no problems. No rust issues here. and the stud twisted partially out and looks like it was striped inside fromt he factory. With 146k on the runner I am thinking i might want a new cat anyway. What do you guys think about a new cat with that many miles.