Here's a general outline. Specific steps and tool requirements may vary slightly depending on the exact engine and model of your Avenger. Always consult a repair manual specific to your vehicle for detailed instructions and torque specifications. A Haynes or Chilton manual is a good investment.
Tools You'll Likely Need:
* Jack and jack stands: Absolutely essential for safety.
* Wheel chocks: To secure the vehicle.
* Engine support bar: Highly recommended to support the engine's weight while removing and installing the mounts. This prevents damage to the engine and transmission.
* Sockets and wrenches (metric): A variety of sizes, including those for the mount bolts and potentially the transmission mount.
* Ratchet and extensions: To reach those hard-to-reach bolts.
* Pry bar: May be needed to help separate the old bushings/mounts.
* Torque wrench: Crucial for tightening the bolts to the correct specification.
* Penetrating oil (PB Blaster, etc.): To loosen rusted bolts.
* New motor mounts: Make sure you get the correct ones for your specific engine.
* Gloves and safety glasses: Protect yourself.
General Steps (Consult your repair manual for precise details):
1. Preparation: Disconnect the battery's negative terminal. Locate and identify the motor mounts (typically two, one on each side of the engine). Observe how they're attached.
2. Access: You'll likely need to partially or fully remove some undercarriage components for access to the motor mounts. This might involve removing parts of the exhaust system or other underbody shields.
3. Support the Engine: This is CRUCIAL. Use a sturdy engine support bar to securely support the engine's weight. Improper support can cause serious damage. Jack up the engine *slightly* only enough to relieve stress on the mounts being replaced.
4. Remove the Old Motor Mounts: This usually involves removing several bolts securing each mount to the engine and the vehicle's frame. Use penetrating oil generously on the bolts ahead of time to help loosen them. They can be very stubborn due to rust and age.
5. Install the New Motor Mounts: Carefully align the new motor mounts and bolt them securely into place, following the reverse order of removal. Use the correct torque specifications from your repair manual.
6. Lower the Engine: Carefully and slowly lower the engine back down using the jack, ensuring the new mounts are properly seated.
7. Reconnect Components: Reinstall any components you removed to access the mounts.
8. Torque Check: Double-check that all bolts are torqued to the correct specifications.
9. Test Drive: After everything is reassembled, start the engine and listen for any unusual noises. Take a short test drive to verify the mounts are functioning correctly and there are no vibrations.
Important Considerations:
* Rust: On a 1998 vehicle, rust is a significant factor. Prepare for stubborn bolts.
* Transmission Mount: While you're working on the engine mounts, inspect the transmission mount as well. It may need replacing too.
* Professional Help: If you're not comfortable working on your vehicle yourself, or if you encounter unexpected difficulties, take it to a qualified mechanic.
This is a simplified overview. Always refer to a repair manual specific to your 1998 Dodge Avenger for detailed instructions, diagrams, torque specifications, and safety precautions. Improperly replacing motor mounts can lead to engine damage or safety hazards. Take your time, be careful, and prioritize safety.
