Replacing the Oil Pressure Sender Unit
After reading the previous posts the job became doable. However, since I'm an amateur weekend mechanic, not all of my questions where answered. This is what I did to the letter: drove the truck up on ramps, removed the + battery terminal, took off the crash guard & unscrewed the oil filter. As stated before, the electrical connector to the sensor has a double locking feature with a red tab that serves as the backup. I used a snake camera to see from underneath through the space between front bumper & torsion rod. Imagine looking at the red tab from the wire end & seeing it on top of the connector. The red tab sticks out more on the left side. This is the locked position. Push it to the right & it will click. I couldn't get my fingers up there so I used a screw driver. I then squeezed the connector from top to bottom (or with fingers at 12 & 6 o'clock) & the electrical connector came off. I couldn't see exactly what was being pinched since it was too dark & dirty up there. The removal socket is a deep 1 1/16" from Sears with a 1/2" drive ($12). The socket has a 1 3/4" well which just barely covers the sensor's crown & makes just acceptable contact with the 6 sided nut. Put on a universal joint, 12" of extensions & a ratchet. I easily unscrewed the sensor & tossed it on the front lawn in disdain. I cleaned the threaded area well with tissues & started the new sensor (Mopar $52) by screwing it in by hand carefully. Tightened it with the set up I used to take the old one out with, cleaned the electrical connector with tissue & snapped it in place. Pushed the red tab from right to left where it clicked. Installed the oil filter, crash pan, + battery cable. The Liberty was leaking 2 quarts every 5,000 miles & the whole underside was a mess. I had visions of a huge garage bill to have the problem fixed, but with the special socket/sensor/snake camera I only spent $157. The camera & socket I can use for other projects so the cost was the $52 Mopar sensor. I didn't want to go cheap with it & have problems later.