Question about 1992 Chevrolet Caprice
The sensor is located on the exhaust manifold on the drivers side of the engine compartment... approximately straight down from where you put the oil in. It's a mother to get to. I had the most luck from the top. Get a special O2 sensor socket from Autozone or Advance. This looks like a normal socket but has the side cut out to make room for the wire that comes out of the sensor. Since the old sensor is rusted in there it helps if you let the engine warm up first so that the sensor and threads are nice and hot. Turn off the car. You'll probably have to get under the car to unplug the connector comming from the sensor. Now stick the socket on the sensor, an extension, and a socket wrench and just pray to God that that thing will turn. After cursing at it for a solid hour it will eventually break free and you'll be able to turn it about 5 degrees at a time before your ractchet will hit something in the engine compartment. After you've got it out, carefully start threading the new one in. Make sure you don't get any of the "never-seze" grease that are on the threads of the new one on the head of the sensor. That stuff will ruin the sensor and you'll have to repeat this whole procedure over again. OK, screw the sensor in till it's tight, reconnect the wire and you're good to go!
Posted on Jan 24, 2009
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Removal & Installation
WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
NOTE Allow the O2 Sensor to cool down before conducting the test. The O2 Sensor voltage should stabilize at 5.0 volts. Raising the hood may help in reducing under hood temps quicker.
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