Tools you will likely need:
* Socket wrench set (likely metric)
* Ratchet
* Extensions
* Possibly a swivel socket
* Rags or shop towels
* New temperature sending unit (ensure you get the correct part number for your engine)
* Possibly pliers or channel locks (depending on the sensor)
* Antifreeze/coolant (to top off after)
* Protective eyewear
Steps:
1. Safety First: Let the engine cool completely before starting this repair. Coolant is hot and can cause serious burns.
2. Locate the Temperature Sending Unit: This is usually located on the engine block, near the thermostat housing. Your repair manual will show the exact location. It's often a single-wire or two-wire sensor.
3. Disconnect the Electrical Connector: Carefully unplug the electrical connector from the temperature sending unit. Take note of how it's connected in case you have trouble remembering later.
4. Remove the Sending Unit: Use the appropriate socket to remove the sending unit. It might be threaded, so you'll need to turn it counter-clockwise to loosen it. Some units can be stubborn due to corrosion. If it's really stuck, use penetrating oil (like PB Blaster) and let it soak for a while before trying again. Use caution not to strip the threads.
5. Clean the Area: Clean any dirt, debris, or old gasket material from the engine block threads where the sending unit was installed.
6. Install the New Sending Unit: Carefully screw the new sending unit into the engine block by hand until it's snug. Then, use your socket wrench to tighten it to the proper torque specification (check your repair manual). Do not overtighten.
7. Reconnect the Electrical Connector: Reconnect the electrical connector to the new temperature sending unit.
8. Check for Leaks: Start the engine and let it run for a few minutes. Carefully inspect the area around the new sending unit for any leaks.
9. Top Off Coolant: If necessary, add coolant to the overflow reservoir to maintain the proper coolant level.
10. Test: After the engine reaches operating temperature, check your gauge to make sure it's functioning correctly. If not, double-check all connections and ensure you have the correct sensor installed.
Important Considerations:
* Correct Part: Use the correct part number for your specific engine. A wrong part will not function correctly.
* Torque Specification: Over-tightening can damage the threads or the sending unit. Always refer to your repair manual for the correct torque specification.
* Coolant: Use the correct type of coolant for your vehicle.
* Professional Help: If you're uncomfortable performing this repair yourself, take your Bronco to a qualified mechanic. This is a relatively straightforward repair, but mistakes can lead to further damage.
Remember, this is a general guide. Always refer to your 1995 Ford Bronco's repair manual for specific instructions and torque specifications relevant to your vehicle's engine. A Haynes or Chilton manual will be very helpful.
