I have a 3.8L that I'm trying to replace the upstream O2 sensor on. I have the special socket but my problem is I can't get the connector apart with the main problem is that I can't get my hands down there to do anything. Do I need to take the upper plenum off to get in there or maybe hire a midget?
donald7150
02-27-2007, 08:34 PM
Here is the procedure from the FSM:
REMOVAL - UPSTREAM 1/1 - 3.3/3.8L
Remove battery, refer to the Battery section for more information.
Remove the battery tray, refer to the Battery section for more information.
Disconnect the speed control vacuum harness from servo.
Disconnect the electrical connector from servo.
Remove the speed control servo and bracket and reposition.
Use a socket such as the Snap-On® YA8875 or equivalent to remove the sensor (O2 SENSOR 1/1).
When the sensor is removed, the threads must be cleaned with an 18 mm X 1.5 + 6E tap. If using the original sensor, coat the threads with Loctite 771–64 anti-seize compound or equivalent.
mfahey
02-27-2007, 10:04 PM
Thanks. I'll give it a go.
mfahey
03-19-2007, 03:21 PM
Finally got around to finishing the job and it went relatively easily by following donald7150's instructions. The only thing I would add is to have PB Blaster or its equivalent on hand in case the old sensor needs to be persuaded to come out. I sprayed it on the engine while it was warm and let it sit for a 1/2 hour before I could break it loose.
