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The car is a 96 LT4 Collectors Addition with about 70,000 miles.
The sensor in question is Bank 2 sensor 1. The 96 FSM indicates the right side of the engine is bank 2 but it is not perfectly clear which sensor is 1 and which is 2. The diagram implies the sensor upstream of the converter is #1. Is that correct? The FSM also implies they are a PITA to remove and lowering of the exhaust may be required. I have replaced these little gems on other cars but never the C4.
[QUOTE=IHBD;1607602568]I just did the right bank O2 sensor on a 94. Same deal as 96. I used my "L" shaped sensor socket that has a multi-1/2" square drive with a bunch of extensions dropped down from above. I have a hoist and oxy/acetylene. I heated the bung around the sensor pretty good from below. lowered the car, and it loosened right up.
Getting to the connector is another whole story. It is way up there. The car has to be stone cold, like an overnight sit cold, or you'll burn the F out of yourself on the cat. I have small hands, and I'm skinny. I got it done without removing anything other than the heat shield. Pretty frustrating, and I had the car on the hoist. The 94 I did was a 6-speed, there's a little more access room than there is on an automatic. Hope you have a 6-speed. I see it's an LT4, good.
Have Fun!
thanks for the tips. I will check to see if I have one of these. It is a 6 speed. I am hesitant to use penetrating oil as I k ow how sensitive these are to chemical contamination.
Update: Using a long plastic tube, I was able to get PB Blaster around the sensor where it threads into the bung. Let it sit for about 30 minutes then tapped with a piece of rebar and a hammer on the bung. Using a socket like the one shown above, mine was a 3/8" drive but used a 3/8" to 1/2" adaptor so I could use 1/2 drive and extensions. Broke free with relative ease. This weekend I will put the car up on jacks to get the wire harness plug.
Update: Using a long plastic tube, I was able to get PB Blaster around the sensor where it threads into the bung. Let it sit for about 30 minutes then tapped with a piece of rebar and a hammer on the bung. Using a socket like the one shown above, mine was a 3/8" drive but used a 3/8" to 1/2" adaptor so I could use 1/2 drive and extensions. Broke free with relative ease. This weekend I will put the car up on jacks to get the wire harness plug.
looks like this sensor may have been replaced at some point. The wire harness plug has a plastic stud on it to attach somewhere. This was already pulled off where ever it mounted to making it relatively easy to access. I could not locate where or what this is supposed to mount to so I just tucked the wires and plug in such a way to avoid the exhaust manifold.
O2 Sensor Location and Removal
