Couple of notes about replacing the lower housing with "Rockauto.com" parts. 1. The Dayco #72025 bypass hose will fit, but it's about a half inch to long, and needs to be shortened up on both ends, compared to the "Motorcraft" bypass hose. 2. The STANT #25271 thermostat o-ring at $0.61 was a good fit/replacement. 3. The hole in the new Motorcraft #RH 148 lower housing for the temp sender is slightly larger than the origional on my '02 Explorer. Since I didn't have a new o-ring or a new sender switch, it took 5 rounds of teflon tape to take up the slack and not leak. I'll switch it out next week.