o2 sensor question!!

[evilunclegrimace]

All O2 sensors should have the same thread

All GM O2 sensors SHOULD have the same thread M18X1.50 if I remember

 

[Knuckle Dragger]

The TBI only has one O2 sensor, Vortecs have 4, 2 upstream and 2 downstream. Plus the TBI did not come with dual exhaust (FWIR), you may have an issue with emissions inspection because it has been modified, if you get a ***** for an official.

Automatic fail in Cali, ***** or not. Headers will fail him without a EO number.

 

[PlayingWithTBI]

Headers will fail him without a EO number.

Yeah - that's a CARB (California Air Resource Board) Executive Order. My Summit Racing shorty headers have one. You can look up your headers or similar ones with the EO and maybe fake it? I have EOs for them, my heads, and cam (not quite the same one, ha ha). Keep copies in my glove box.

 

[Redneckgeriatric]

All GM O2 sensors SHOULD have the same thread M18X1.50 if I remember

your memory works! that is an expensive tap, over $90 back in 2006. its almost a must have in you weld in bungs.

 

[evilunclegrimace]

your memory works! that is an expensive tap, over $90 back in 2006. its almost a must have in you weld in bungs.

Now a days they are something like $10-15 bucks.

 

[Knuckle Dragger]

Yeah - that's a CARB (California Air Resource Board) Executive Order. My Summit Racing shorty headers have one. You can look up your headers or similar ones with the EO and maybe fake it? I have EOs for them, my heads, and cam (not quite the same one, ha ha). Keep copies in my glove box.

I was licensed in Cali for testing for over 12 years, worked for the BAR for a short time. I'm intimately familiar with California emissions laws.

 

[PlayingWithTBI]

I'm intimately familiar with California emissions laws.

I wasn't saying you weren't, I was just expounding for the OP. He can go on to Summit Racing's website and narrow his search for headers with "California EO" certification...

https://www.summitracing.com/search...o-approved&SortBy=Default&SortOrder=Ascending

 

[Schurkey]

I bought a tap that I used for repairing O2 sensor threads.
https://www.amazon.com/gp/product/B000K1JY7O/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This is supposedly a "Vermont American" tap, except that it's not made in Vermont, or anywhere in America. It's a piece-of-crap Communist Chinese unit, and because it's a "plug" tap, the threads don't taper nearly enough. There's other choices on Amazon, but almost all of them are also Chinese, and also plug taps. You really want a starting tap, not a plug tap.

Two uses on Stainless pipe bungs (cleaning-out damaged threads from seized O2 sensor removal) and now it's mildly chipped 'n' broken.

OTOH, it's not $90. It's ~$18 now, and $12.69 when I bought it in May '19. No, I would not buy it again.