Tools You'll Need:
* Socket set (metric): Various sizes, including those for the radiator drain, bolts holding the water pump, and fan shroud.
* Wrench set (metric): For accessing difficult-to-reach bolts.
* Ratchet and extensions: To reach bolts in tight spaces.
* New water pump: Make sure you get the correct one for your specific engine.
* New gasket(s) and seals: These are essential to prevent leaks.
* New coolant: Use the correct type specified in your owner's manual (usually a 50/50 mix of coolant and distilled water).
* Drain pan: To catch the coolant.
* Jack and jack stands: For safe and stable working conditions.
* Pry bar (possibly): To help break free stubborn bolts.
* Torque wrench: Crucial for tightening bolts to the correct specification.
* Gloves: Protect your hands.
* Safety glasses: Protect your eyes.
Steps:
1. Safety First: Disconnect the negative battery terminal. Let the engine cool completely before starting. Work in a well-ventilated area.
2. Drain the Coolant: Locate the radiator drain valve (usually at the bottom of the radiator) and carefully open it to drain the coolant into your drain pan.
3. Remove the Fan and Shroud: This may involve removing the fan clutch (often requires a special socket or wrench) and then the fan shroud. Consult your repair manual for the specific procedure.
4. Remove the Serpentine Belt: Loosen the tensioner pulley to remove the serpentine belt. There are various methods for doing this depending on the tensioner design; your repair manual will show you.
5. Access the Water Pump: You will likely need to remove some components to access the water pump. This might include things like:
* Intake Manifold (potentially): This is a more significant undertaking and might be necessary on some models. Check your manual.
* Various Belts and Pulleys: It may be necessary to remove some belts and pulleys in addition to the serpentine belt to gain better access.
6. Remove the Water Pump: Once you have access, carefully remove the bolts holding the water pump to the engine block. These bolts can be stubborn, so use penetrating oil if needed.
7. Install the New Water Pump: Carefully install the new water pump, ensuring the gasket is properly seated. Tighten the bolts to the manufacturer's specified torque using your torque wrench.
8. Reassemble: Reinstall all components in the reverse order of removal, ensuring everything is properly seated and tightened. Reinstall the serpentine belt.
9. Fill with Coolant: Fill the radiator and coolant reservoir with the correct mixture of coolant and distilled water.
10. Bleed the System: Start the engine and let it run for a few minutes. Check for leaks. Top off the coolant as needed. Properly bleeding the cooling system is crucial to prevent air pockets that can cause overheating. Your manual will explain how to bleed the system for your specific vehicle.
Important Considerations:
* Repair Manual: This is absolutely essential. Generic instructions like these cannot cover every variation in this process.
* Torque Specifications: Using the correct torque is critical to avoid damaging the engine block or the water pump itself.
* Coolant Type: Use the correct type of coolant recommended for your vehicle. Mixing different types can create problems.
If you're not comfortable performing this repair yourself, it's best to take your Bravada to a qualified mechanic. Replacing a water pump incorrectly can lead to significant engine damage.
