Here's what you need to know:
* Difficulty: This is a challenging repair, rated as difficult to very difficult by most mechanics.
* Time Commitment: Expect to spend at least a full day, potentially more, especially if you've never done this before.
* Tools Required: You'll need a comprehensive set of tools, including various sockets, wrenches, screwdrivers (Phillips and flathead), pliers, a drain pan, coolant, and possibly special tools for accessing certain fasteners.
* Parts: You'll need a new heater core, new coolant, and possibly new hoses and clamps depending on their condition. Make sure to get the correct part for your specific van model.
* Safety: Work in a well-ventilated area. Coolant is toxic, so wear gloves and eye protection. Be careful when handling hot coolant if the engine is warm.
General Steps (these are very general and may not be entirely accurate for your specific vehicle):
1. Drain the coolant: Drain the engine's cooling system completely.
2. Access the heater core: This usually involves removing parts of the dashboard, potentially the glove box, and possibly the center console. Consult a repair manual for your specific year and model.
3. Disconnect hoses: Carefully disconnect the heater core hoses. Be prepared for some coolant spillage.
4. Remove the heater core: This is the most challenging part. The core is usually located behind the dashboard. You might need to remove parts of the HVAC system to access it.
5. Install the new heater core: Install the new heater core, ensuring proper sealing.
6. Reconnect hoses: Reconnect the heater hoses securely.
7. Reassemble the dashboard: Carefully reassemble all the dashboard components you removed.
8. Refill the cooling system: Refill the cooling system with the correct type and amount of coolant.
9. Bleed the air: Bleed the air out of the cooling system to prevent overheating.
10. Test the system: Start the engine and check for leaks. Test the heater to ensure it's working properly.
Strongly Recommended:
* Repair Manual: Obtain a repair manual specific to your 1997 Dodge B250 van. This will provide detailed instructions and diagrams, crucial for successfully completing this repair. Factory service manuals are best, but Haynes or Chilton manuals can also be helpful.
* Professional Help: If you're not comfortable with complex automotive repairs, it's highly recommended that you take your van to a qualified mechanic. The cost of professional repair will likely be less than the cost of damaging something during a DIY attempt.
Attempting this repair without proper knowledge and tools can lead to significant damage to your van. Proceed with caution and consider professional help if you're unsure.
