Disclaimer: Attempting this repair without proper knowledge and tools could severely damage your engine. Incorrect procedures can lead to further costly repairs or even engine failure.
General Steps (Highly Simplified):
1. Preparation: Disconnect the battery. Drain all fluids (engine oil, coolant, transmission fluid – if applicable). Gather all necessary tools and replacement parts (new rear main seal, gaskets, seals, etc.). A service manual specific to your 1996 Dodge Neon is absolutely crucial.
2. Transmission Removal (Likely Necessary): On most vehicles, including the Neon, you'll likely need to remove the transmission to access the rear main seal. This is a very involved process involving disconnecting numerous components, such as the driveshaft, clutch cable (if manual transmission), shift linkages, etc.
3. Rear Engine Cover/Oil Pan Removal: After transmission removal, you'll likely need to remove the rear engine cover and possibly the oil pan for better access. This requires removing many bolts and carefully disconnecting any sensors or wiring harnesses.
4. Seal Removal and Installation: Once you have access to the rear main seal, carefully remove the old seal using the appropriate tools (seal puller). Clean the area thoroughly to remove any old sealant or debris. Install the new rear main seal, ensuring it's seated properly. Pay close attention to the service manual for proper installation.
5. Reassembly: This is the reverse of the disassembly process. Carefully reinstall the oil pan, rear engine cover, and transmission. Double-check all bolts and connections.
6. Refilling Fluids: Refill the transmission, engine oil, and coolant to the correct levels.
7. Testing: Start the engine and check for leaks. Let the engine run for a while to ensure there are no leaks.
Tools You'll Likely Need (Not exhaustive):
* Transmission Jack: Essential for supporting the transmission during removal and installation.
* Engine Support: To prevent engine damage during transmission removal.
* Torque Wrench: Crucial for tightening bolts to the correct specifications.
* Seal Puller: To remove the old rear main seal.
* Various Socket Wrenches and Ratchets: For removing and installing numerous bolts and nuts.
* Pry Bars: Used carefully during disassembly.
* Service Manual: Absolutely necessary for detailed instructions and torque specifications.
Why You Should Seek Professional Help:
* Complexity: The process is intricate and involves numerous steps.
* Specialized Tools: Many specialized tools are needed.
* Risk of Damage: Incorrect procedures can cause significant engine damage.
* Time Consumption: This is a very time-consuming repair.
The cost of a professional repair might be more palatable than the potential cost of damaging your engine attempting this yourself. Always weigh the risks and your mechanical abilities before starting such a project. Consult a trusted mechanic or repair shop for professional assistance.
