This is a general overview; the exact procedure might vary slightly depending on the specific engine configuration. Always consult a repair manual specific to your 1994 Chrysler Concorde 3.5L engine for detailed instructions and torque specifications. A Haynes or Chilton manual is a good investment.
Before you begin:
* Safety First: Disconnect the negative battery terminal. Use jack stands to safely support the vehicle. Wear safety glasses and gloves.
* Gather Tools and Parts: You'll need a variety of tools, including sockets, wrenches (metric), screwdrivers, pliers, a coolant drain pan, a new water pump, new gasket (and possibly sealant), and possibly a new thermostat and housing depending on condition.
* Coolant Drain: Drain the engine coolant completely. Locate the drain plug on the engine block (usually low on the radiator) and the radiator drain valve.
* Consult a Repair Manual: This is crucial! The steps outlined below are general and may not be entirely accurate for your specific vehicle.
General Steps (Consult your repair manual for specifics):
1. Access the Water Pump: This usually involves removing various components like the serpentine belt, pulleys, and possibly the fan and fan shroud. You might need to remove some other components to get adequate access. The exact components will depend on your specific engine. Take pictures as you go to help with reassembly.
2. Remove the Old Water Pump: Once you have access, loosen and remove the water pump bolts. The pump may be stubborn; use penetrating oil if necessary. Carefully remove the old pump and its gasket. Inspect the gasket mating surfaces on the engine block for any damage or debris. Clean them thoroughly.
3. Install the New Water Pump: Apply a thin, even bead of gasket sealant (if required by your new pump; check the instructions) to the new pump gasket. Carefully align the new water pump with the engine block and install the bolts. Tighten the bolts to the manufacturer's specified torque (found in your repair manual). Do not overtighten!
4. Reinstall Components: Carefully reinstall all the components you removed in reverse order, ensuring everything is properly aligned and secured. Reinstall the serpentine belt, making sure it's properly routed.
5. Refill Coolant: Refill the cooling system with the correct type and amount of coolant (usually a 50/50 mix of coolant and distilled water). Bleed the air from the system to remove air pockets. Consult your repair manual for the proper bleeding procedure; often this involves running the engine for a short time, letting it cool, and then topping off the coolant.
6. Check for Leaks: After running the engine and letting it cool, carefully inspect the water pump and surrounding area for any leaks.
7. Test Drive: Take the car for a short test drive to ensure everything is working correctly. Monitor the temperature gauge.
Important Considerations:
* Torque Specifications: Using the correct torque specifications is critical to prevent damage. Use a torque wrench.
* Gasket Sealant: Use only the type of sealant recommended by the water pump manufacturer.
* Coolant Type: Use the correct type of coolant for your engine.
* Professional Help: If you're unsure about any step, seek professional help. A poorly installed water pump can lead to serious engine damage.
This is a complex job, and attempting it without the necessary knowledge and tools could result in further damage to your vehicle. Prioritize safety and consult your repair manual throughout the process. Again, a professional mechanic is the safest and often most cost-effective route if you lack experience.
