HELP! O2 Sensors...

[brooklands NSX]

I searched prime and can't seem to find a write up on how to remove and install O2 sensors on a NA1 NSX (I have 1994). Can anybody post a link here on how to change both O2 sensors. Much appreciated. Also does anybody have any suggestions on which brand of O2 sensor seems to work out best reliability/quality/budget-wise.

 

[dragoon]

Download the service manual and look up your sensor :http://www.nsxprime.com/wiki/Service_manuals and this for the sensors themselves http://www.nsxprime.com/forums/showthread.php?t=135257&highlight=sensor and/or http://www.nsxprime.com/forums/showthread.php?t=134631&highlight=sensor.

 

[drew]

I recently changed out my O2 sensors...they were seized. I even hit it with days of PB Blaster prior to the job.

The O2 socket wasn't strong enough and the open end wrench was rounding off the hex.

If you are not going to reuse the installed sensors, I recommend just cutting off the wire harness and use a 22MM box end wrench. With a cheater (ghetto style): they came right off.

If you are going to reuse the sensors, then you can remove the connectors from the shell to get the wrench on the sensor WITHOUT cutting the wires. Record the wire positions in the shell. Next pull out the white connector shell insert and use a pick to push the connector "down and out". It takes a bit of practice, the first one takes 20 minutes, the next one take 20 seconds. Make sure not to get anything on the sensors (including PB blaster/penetrate).

Drew

 

[brooklands NSX]

Thanks for the info guys!

 

[MrTwo]

sparkplugs.com has the best price I've found on OEM O2 plugs for our cars. Got mine changed when I did the headers and they work great. There was a coupon code in the vedor section when I ordered mine.

 

[brooklands NSX]

sparkplugs.com has the best price I've found on OEM O2 plugs for our cars. Got mine changed when I did the headers and they work great. There was a coupon code in the vedor section when I ordered mine.

Good to know. Thank you for that helpful info.

 

[myhui]

Get the Alltrade 648625 Kit 51 Oxygen Sensor Socket Tool Set from Amazon. Here is a direct link to Alltrade: http://www.alltradetools.com/catalog/engine-drivetrain/161-648691-o2-sensor-offset-puller.html

Or get the KD Tools 7/8 in. (22mm) Oxygen Sensor Socket from Sears. Here is a direct link to KD Tools: http://www.kd-tools.com/3259.htm

If it gets stuck half way out, it's best you reverse course and tighten it back in, and get a professional's help, as you might need to rethread the hole in the exhaust.

Kragen Auto Parts (now sold to O'Reilly) had a 50% blow-out sale on all their specialty tools, and this item was the first one to go. http://www.cskauto.com/

 

[NSXclear]

The Denso O2 sensors are stock for the NSX, but the NTK (NGK) 02 sensors work just as well.

The NTK ones are much cheaper. Buy the NTK ones. They are a direct fit.

 

[NSXclear]

You can go to your local Autozone and borrow their 02 sensor tool.

Kragen/O'Riely may have it also to borrow.

 

[brooklands NSX]

The Denso O2 sensors are stock for the NSX, but the NTK (NGK) 02 sensors work just as well.

The NTK ones are much cheaper. Buy the NTK ones. They are a direct fit.

You can go to your local Autozone and borrow their 02 sensor tool.

Kragen/O'Riely may have it also to borrow.

Thanks for all the extra hints, but I got lazy and ended up having my trusty shop install the O2's for me. Went with the NTK's and working great so far. It's probably a good idea I didn't attempt this one on my own as the rear O2 didn't come out easily at all.