Tools You'll Need:
* Jack and jack stands: Essential for safely supporting the engine.
* Engine support bar: Highly recommended to prevent engine damage. This distributes the weight evenly.
* Sockets and wrenches: Various sizes, likely including metric and SAE. Check your repair manual for specifics.
* Torque wrench: Crucial for tightening bolts to the correct specification.
* Pry bar or large screwdriver: May be needed to help separate the mount from the engine or frame.
* Hammer (rubber mallet preferred): For gently tapping parts loose.
* Penetrating oil (PB Blaster, etc.): Helps loosen rusted bolts.
* New motor mounts: Obviously! Get the correct ones for your engine.
* Safety glasses and gloves: Protect yourself.
Procedure:
1. Safety First: Disconnect the negative battery cable. Support the vehicle securely on jack stands. Never work under a vehicle supported only by a jack.
2. Prepare the Engine: Locate the motor mounts. There are typically two on the sides of the engine and possibly one in the front or rear, depending on the engine.
3. Remove Related Components: You may need to remove parts to access the motor mounts, such as air cleaner, hoses, wiring harnesses, or exhaust components. Consult your repair manual to see what needs to be removed. Take photos as you go to help with reassembly.
4. Loosen Mounting Bolts: Apply penetrating oil to the mounting bolts several hours before starting. Use the correct sockets and wrenches to carefully loosen the bolts attaching the motor mounts to both the engine and the frame. They might be very tight, so be prepared for some resistance.
5. Support the Engine: This is critical. Use the engine support bar to secure the engine. If you don't have one, a sturdy piece of wood strategically placed can offer some support, but this is less ideal. The goal is to prevent the engine from shifting or dropping while you remove the mounts.
6. Remove Old Motor Mounts: Once the bolts are loosened, carefully separate the old motor mounts from the engine and frame. A pry bar or screwdriver might be necessary to help break them free. Work slowly and carefully to avoid damage.
7. Install New Motor Mounts: Carefully align the new motor mounts with their respective locations on the engine and frame. Install the bolts and tighten them *slightly* by hand. Do not fully tighten them yet.
8. Securely Mount the Engine: Ensure the engine is properly positioned and supported before tightening the bolts.
9. Tighten Mounting Bolts: Use your torque wrench to tighten the mounting bolts to the manufacturer's specifications (found in your repair manual). This is crucial to prevent future problems.
10. Reconnect Components: Reinstall any components you removed earlier.
11. Lower the Engine: Carefully remove the engine support bar.
12. Check and Double-Check: After lowering the engine, check all connections and ensure nothing is rubbing or interfering. Start the engine and check for any unusual noises or vibrations. A slight vibration is normal, but excessive vibration indicates a problem.
13. Reconnect Battery: Reconnect the negative battery cable.
Important Considerations:
* Repair Manual: This is the most important tool. A factory service manual for your specific 1969 Dodge Dart will provide detailed instructions, torque specifications, and diagrams.
* Engine Type: The exact procedure may differ slightly depending on the engine in your Dart (e.g., slant-six, V8).
* Rust: Older cars often have rusty bolts. Be prepared to deal with this and possibly need to replace bolts.
* Patience: This is not a quick job. Take your time and work carefully to avoid damaging anything.
If you're not comfortable performing this repair yourself, it's best to take your car to a qualified mechanic. Incorrectly installed motor mounts can lead to serious engine damage.
