Posted: Sun Jan 06, 2013 8:51 am Post subject: O2 sensor clearance problem with u-bend delete
I went ahead and bought a magnaflow (PN 23405) downpipe (3.8 L) with cat from Summit, and went to install it yesterday. Had the new cat bolted in, went to screw the sensor in and noticed I now have a clearance problem with the O2 sensor hitting the heat shield for the O2 sensor harness. I beat on the heat shield a little to get more clearance but the end of the sensor still rubs. I removed the new pipe for the time being and put the old cat back on till I figure out a better method. I'm thinking the wires might fray or cut with it rubbing the way it is. An O2 simulator would definitely solve the clearance problem but I was looking to keep the sensor for the time being with an emissions inspection coming up. I also see that ZZP sells an elbow that relocates the sensor out of the way, and I may try that. If the magnaglow had the O2 bung about another 1/2 inch further rearward there wouldn't be any issues. I'm also thinking of sending it back and getting a different brand if another offers better clearance.
Anyone else have this problem with an after market cat / downpipe?
Here's a pic of it before I screwed in the sensor. Pic is not the greatest, but you can probably still tell it is close. Like I said, if the bung were a little further back, it wouldn't be a problem. Maybe Magnaflow changed the location slightly, or maybe my car is a bit off. This was before I beat the heat shield, I've done about as much beating as I can do. Was thinking of trimming some of the back off the heat shield, or going with a 90 degree elbow.
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