Can an O2 Sensor Be Installed In Closed EGR Port?  By  JerryScript (Read 4,538 times)

Jerry, I would say that would be fine, as long as it's the right angle.

You have to make sure the bottom-tip of the o2 sensor is pointing towards the ground... This prevents moisture from pooling on the sensor....

I have Ecotrons o2 sensors... I haven't installed them yet but I have read the installation manual and know a fair bit on how and where, proper orientation to install them.... But reading is only one part, I can offer the experience from someone else:



Skip through it if ya want till you see where his o2 sensor is.... It's way beyond where ecotrons recommends installing but he's getting accurate readings... These GY6's have very small exhaust pipes and the same o2 sensor could be fitted on a 3" exhaust manifold for a car....

Your distance IMO is fine, just make sure orientation would be bottom of o2 sensor pointing downward.

I agree with dmartin95, the location should work. The orientation will be critical to avoid moisture. Ensuring that you have no leaks in the pipe is also critical. If you have any the readings will trend toward the lean side. When I installed my sensor I noticed a weld point that was leaking from poor construction. Once I fixed it my readings were much better.

I did a double take of the pic you  provided and it got me thinking, I'm not sure how well your plan would work, even using a *45......

When I first looked at your pic, I was thinking of just whacking the end off, low enough so the tip would be in your exhaust flow... thread it right into the pipe and not use a bung... Of course you need to know the diameter of the pipe, I can get ya measurements of the o2 sensors threaded area if ya need...

The bung is just an exhaust port and you don't need it, you only need something to thread the o2 sensor into....

As far as adding to that pipe....Not so sure how well that would work... I would advise completely removing it, if, and only if, you feel confidant you can remove all the weld build up around the new hole... You will need a nice and smooth surface to have your bung welded to....

If I were you, I would start with getting a measurement of the diameter of that egr port.... Is it angled towards the ground?

Thank for the advice John! Yes I'm thinking of doing this to the new scooter, so long as it doesn't cost me more than $100. Most of the kits I see are around $150, but I'm thinking of just purchasing an O2 sensor and scavenging a cheap volt meter for the display.

Worst case scenario, if it doesn't work right I'll have to put a plug over the hole just like I did with the EGR port.

Taking the entire pipe off will make it much easier to work with on the bench. Next I would grind the EGR port off right were it meets up with the exhaust pipe. That will give you a very easy surface to work with. Then depending on how deep the sensor sits after the threads will be how big your bung needs to be. Like the one I have was 1/2". You want to tip of the sensor to be slightly poking in the exhaust has flow. From there weld it on in the 1-3 o'clock position. The bung cap will also be helpful for plugging it when not using the sensor.

I have my stock engine pipe from the 16" scooter just taking space its yours for shipping . It will need some refinish work its got some rust . I also have some performance mufflers with engine pipes that might be a better idea . Here is a link for pictures removable baffle for the quiet times .

John

Just trying to keep it clean. IF there is a perfectly good hole there already, I wouldn't want to make another. I'm not going to make a decision on mounting till I have parts in hand, and can determine the best orientation for everything.