Hello fellas, im trying to make a DIY for oxygen sensors, all 4 of them,



i took as an example a thread of Lexbox https://www.clublexus.com/forums/per...with-pics.html

im sort of noob at this, but thats how my 14mm bolts are looking like , rusty as hell, compare to the ones that Lexbox had to deal with.. ill PB blast them

So i am assuming that i would need to take of my headers in order to reach all of my O2 sensors, or am i wrong?

i dont know how to reach the 8th bolt that i marked red on the diagram
on this picture as well
im sure i heave exhaust leak somewhere, that's another reason i want take off headers and front exhaust pipe, and make a nice DIY,
Any advise or tips on removing headers if necessarily at all are appreciated

 

You should be able to remove all 4 O2 sensors with removing the manifolds. Should only have to remove the manifold if the O2 sensors break while removing them. Soak them real good with PB blaster.

 

Might need to jack the car up to remove the ones below

 

Thanks Guys, thing is i can really see myself getting to three of them without getting the cats off, but the one on the bank2 i think, IS MARKED GREEN ON PICTURE above, not enough space really,
here is little update..



i could reach sensors on bank 1, but first on bank two is tricky one,, Any Advise, or ill need to take off headers?, THank you

 

Hello CL people, i want to share with you my experience, i desided to take my car to a mechanic..

and what i saw was something, cins i was planning on to try to do it myself

i had a leak in my exhaust pipe, i wasnt sure though if it was the exhaust manifold with TWC or the front exhaust pipe.. when before i looked under my car i saw how bad were the bolts holding the two together (Rusty like a hundred year old car), Mechanic had literally torch them off..
plus the heat insulator on my Y PIPE was not an easy peace to take off as well. So when finally he took it off, and disconnected The Y pipe and Manifold, we found a hole in My Front pipe right where the Oxygen sensor is located. Unscrewed the sensor with a lot of force, disconnected it under the passengers side carpet. that was one of them. Oh Boy and that was just the beginning.

Dude welded the whole and put in a new sensor.

The best way to take off the next sensor when the car is lifted is BANK 1 SENSOR 2, its like right there . It was an easiest one to deal with, no struggle at all.
The third one was the BANK 1 SENSOR One. And that %$&%$%% was a pain in the %&^.. when he finally unscrew it, the thread was messed up. Dude made new thread. got the new sensor in.

So the next on and the last on was the one i had doubts about to take off without taking the headers off, So yes its possible, but only when you have the right tools, which i didnt. 15 minutes worth of mechanic hustle, finally out...

PS. when i bought a car like 5 years ago i had the check engine light on, and i had it ever since.
read the codes at lexus dealeship and it one of them was Charcoal Canister Valve malfunction.
And after i left the shop, no check engine lights, smooth ride, AWSOME
THANKS