Installing O2 sensor nightmare

I got ready to install a nice Denso O2 sensor in the Bank1, Sensor 1 location. I got under the truck to take a look, and the sensor location on the driver side of the engine looks impossible to get a ratchet in there. I can’t even get my hand in there to touch the darn thing. I’m going to try from the top to see if it will be any easier. Any suggestions?

 

Trying it from the top of the engine was not a success. It’s impossible to see it, much less reach it. Going back to underneath to try from another directions. Figures my first O2sensor is the most difficult one.

 

You'll need an offset O2 socket and a half inch ratchet or breaker bar pretty easy from underneath. In my experience it was harder to get the electrical connections undone.

 

Awesome. Ordered it last night. Thanks!

 

If you have an Advance or O'Reilly nearby they have them as loaner tools

 

Dito
An extension of any kind to reach the neck of the O2 sensor tool is required. Note how you will have to loosen as you may require a flex neck extension.

Also, find a extra long small head screwdriver, plus, a long neck curved thin scissors ✂️ pliers to get the sensors disconnected.

Harbor freight is my next best friend for tools.

https://www.google.com/search?q=lon...Q420IRg&biw=414&bih=617#imgrc=uzJ-sIHY_Cu5cM:

 

The most difficult part of changing O2 sensors was disconnecting the figuring how to unplug the electrical connector. May need PB Blaster to enable getting the sensor to loosen. I just changed all 4 on my 05 w/ 4.7 eng.

Mike

 

Yeah. Looked like a nightmare job when I considered doing it after was told the sensors were bad. Waited a few years due to lack of urgency and need. Had the 2002 in the shop for something else and the mechanic asked if he could do it. The truck does seem to perform better. The exhaust isn’t a stinky on winter mornings. Good info on that socket. Looks like the right tool for the job!