Tools You'll Likely Need:
* Jack and jack stands: Absolutely essential for safety.
* Wheel chocks: To secure the vehicle.
* Socket set and wrenches: Various sizes will be needed.
* Torque wrench: Crucial for proper tightening of bolts.
* Pry bar: May be helpful for separating the mount from the frame.
* Hammer (rubber mallet preferred): For gentle persuasion.
* New motor mount: Make sure you get the correct replacement part for your vehicle's year and model.
* Shop rags or towels: To keep things clean.
* Possibly a engine support bar: To help support the engine while you work. This is highly recommended.
General Steps:
1. Safety First: Disconnect the battery's negative terminal. Secure the vehicle on jack stands, ensuring it's stable. Use wheel chocks on the rear wheels.
2. Access: You'll need to access the right front motor mount. This usually involves working underneath the vehicle. The level of difficulty will depend on the specific year and model. Some access might require removing parts like the air cleaner assembly or other components obstructing your view.
3. Support the Engine: This is CRITICAL. The engine is heavy, and removing the mount without support risks dropping the engine, causing significant damage. Use a transmission jack or engine support bar to help hold the engine in place.
4. Disconnect the Mount: This will involve removing bolts connecting the mount to both the engine and the frame. These bolts are often rusted or seized, so penetrating oil and patience are key. You may need to use a breaker bar or impact wrench.
5. Remove the Old Mount: Once the bolts are removed, carefully separate the old motor mount from the engine and frame. A pry bar can be helpful, but use it cautiously to avoid damaging surrounding components.
6. Install the New Mount: Position the new motor mount in place, ensuring it's correctly aligned with both the engine and frame.
7. Reinstall the Bolts: Tighten the bolts securely but do not overtighten. Use a torque wrench to achieve the manufacturer's specified torque.
8. Lower the Engine Support: Carefully lower the engine support bar or transmission jack.
9. Reconnecting: Reinstall any components that were removed to access the motor mount.
10. Check: After reinstalling everything, start the engine and check for any unusual noises or vibrations. Ensure the engine is properly aligned. Double-check all bolt connections.
Important Considerations:
* Consult a Repair Manual: This is the single most important piece of advice. A repair manual specific to your Oldsmobile 98's year and model will provide detailed diagrams, torque specifications, and step-by-step instructions.
* Rust and Seized Bolts: Be prepared for the possibility of rusted or seized bolts. Penetrating oil is your friend. If you're having trouble removing bolts, consider using a heat gun or torch (carefully!) to help loosen them.
* Difficulty Level: This is not a beginner's job. If you lack mechanical experience, it's highly recommended to have a qualified mechanic perform this repair. Improper installation can lead to engine damage.
Remember safety first. If you are unsure about any step, seek professional assistance. A poorly done job can be far more expensive than hiring a mechanic in the first place.
