PDA

View Full Version : Plugging The A/s On A Pacesetter While Adding An O2 Sensor



LX-incredible
02-05-2007, 08:49 PM
After several hours at the hardware store I have found something with the same thread as our air suction pipes. For those of you who don't know the A/S bung is the large one in the center of this picture here:
http://img260.imageshack.us/img260/1482/1headerwithascentba5.th.jpg (http://img260.imageshack.us/my.php?image=1headerwithascentba5.jpg)
This is what I purchased for about $7.00 at The Home Depot:
http://img260.imageshack.us/img260/2093/2whatuneeduq7.th.jpg (http://img260.imageshack.us/my.php?image=2whatuneeduq7.jpg)
It is a 3/4" brass union for copper pipe (NIBCO 733 BRASS UNION SIZE 3/4" QTY 1).
Take apart the union and discard the copper piece and the nut:
http://img172.imageshack.us/img172/5152/3unionapartub4.th.jpg (http://img172.imageshack.us/my.php?image=3unionapartub4.jpg)
Next you will need a bosch style O2 sensor. These don't have to made by bosch, but they will look like this:
http://img250.imageshack.us/img250/3189/4boschstay9.th.jpg (http://img250.imageshack.us/my.php?image=4boschstay9.jpg)
Next take the male part of the union that you saved and install it on the O2 sensor like this:
http://img250.imageshack.us/img250/9307/5boschwnutid1.th.jpg (http://img250.imageshack.us/my.php?image=5boschwnutid1.jpg)
Making sure that the nut part of the sensor is in contact with the male part of the union, install into the bung:
http://img250.imageshack.us/img250/5543/7installingo2ct3.th.jpg (http://img250.imageshack.us/my.php?image=7installingo2ct3.jpg)
You may need to pull back on the sensor while screwing the nut into the bung. Make sure it is in straight and tighten it, The finished product will look like this:
http://img185.imageshack.us/img185/6500/8o2installedxr0.th.jpg (http://img185.imageshack.us/my.php?image=8o2installedxr0.jpg)
http://img185.imageshack.us/img185/6615/9viewohwo2aw4.th.jpg (http://img185.imageshack.us/my.php?image=9viewohwo2aw4.jpg)
One plugged A/S bung. Since the tip of the sensor comes in contact with the exhaust gasses, you now have the possibility of hooking up an air/fuel ratio guage.:rockon:
As for sealing, the soft pacesetter washer at the bottom of the bung will do the job if properly tightened, but it probably wouldn't hurt to use some sealant on the bung threads and in between the sensor and the union part.
Enjoy.:)

MessyHonda
02-05-2007, 09:38 PM
dude you a lifesaver......i also went to home depot but they only had pipe thread bolts that were only 1 inch....so i had to go out and we got a freeze plug that we were going to weld on but this is way better. my other option was get a EGR thing from the junkyard and weld the lil pipe shut.

LX-incredible
02-05-2007, 09:44 PM
It is a 3/4 slip to slip copper union that is located with the solder fittings. The union thread does not mach any type of pipe thread that I know of.

EricW
02-06-2007, 09:51 PM
Nice Find. That would only give you a A/F reading for cylinder #4 though.

LX-incredible
02-06-2007, 10:13 PM
True, but that shouldn't be a problem with fuel injection, unless you had a misfire in cylinder #4.

paso100
02-06-2007, 11:38 PM
Hmmm ... Have you driven the car w/ this? Let us know if/how this works out after driving around for a while. I think the expansion/cooling rates will be different between different metals and this will cause a leak. But worth a try. Let us know!

LX-incredible
02-07-2007, 09:04 AM
Once I get my flex pipe and cat, it is going on. JC Whitney has like a month wait on their flex pipes before shipping them out. I will let you know...in about a month.

MessyHonda
02-07-2007, 09:58 AM
what happen to the rest of the pipe?

LX-incredible
02-07-2007, 10:13 AM
I know a guy at work with an exhaust shop connection, if that falls through, pacesetter catback with dynomax super turbo muffler.