Tips on switching out the rear O2 sensor

[reags8]

Any tips on removing and replacing the rear O2 sensor ? I can't seem to fit my fat hand over the tranny.
Is it possible to get to it by removing the drivers side wheel ?
Reags

 

[masho95]

Worst case senario, if you can't get to the sensor any other way, would to be to pull the y-pipe of and then it's simple to change. If you haven't had the y-pipe off in a long time, I'd keep trying to get a wrench in there to get it out.

 

[projectSHO89]

Find someone with small hands and forearms to change it (I assume you're doing an ATX, they're really a tight fit).

I did two of them in two days last summer and my arm was bruised and scratched up pretty badly.

Steve

 

[Yamaha V6]

Get an offset O2 Sensor socket.

Make sure the car's cold.

Use the offset socket & a long extension & a 3/8" ratchet to "pop" the sensor loose a bit, so it'll spin by hand. Use the O2 sensor wiring & twist it tighter in the direction you want the sensor to spin (ccw). The sensor will spin once the tension on the wiring is twisted pretty well. Installation is similar, but go easier on the twisting. Should thread in there fairly well.

As for the connector WAAAAAAY up there, it is POSSIBLE to get it from the top, but not likely. Best bet is the small hand & forearm approach (which is why the car has to be cold).

I hate ATX O2 sensors. Good luck.

 

[NotSoSlowSHO]

Live in Cali and own a Cali SHO


I have never had a problem with removing my O2's. I first disconnect the electrical plug (i manage to do it with one hand), then slip a box-end wrench over the connector and down to the O2. Simple twist of the wrist gets it loose, then unthread it by hand thumb

 

[sdpatt]

To access the electrical connector on the rear O2 sensor on the ATX, lay on top of the engine and reach one arm down between the engine and the firewall. To access the sensor, use an O2 sensor socket, U-joint and 9" of extensions, in that order, on a socket wrench.

 

[Orkin]

As for the connector WAAAAAAY up there, it is POSSIBLE to get it from the top, but not likely. Best bet is the small hand & forearm approach (which is why the car has to be cold).

Actually, it's MUCH easier to do it from the top. While laying on top of the intake manifold, reach behind the engine with your left arm (removing the black plastic cover back there gives you much more room), and reach over the right side of the engine with your right arm. That way you can grab the sensor end of the connector with your left hand, and the other with your right hand, making it real easy to connect them.

<small>[ October 01, 2003, 11:43 AM: Message edited by: Orkin ]</small>

 

[Yamaha V6]

Except that some of the ones I've seen have actually had the connector lock-clip break off, giving you nothing to really push-down to release the connector.

Kenny, MTX's are a 5 minute job once you're under there, and yield no abrasions or bruises. ATX's can take a while, and usually hurt.