Tools You'll Likely 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 and prevents it from shifting unexpectedly.
* Socket set and wrenches: Various sizes will be needed, depending on your specific engine and mounts.
* Torque wrench: Crucial for tightening bolts to the correct specification.
* Pry bar or large screwdriver: To help loosen and separate the old mounts.
* Hammer: Possibly needed to help dislodge stubborn mounts.
* Penetrating oil (PB Blaster, etc.): Soak bolts overnight to loosen rusted connections.
* New motor mounts: Purchase the correct replacements for your truck.
* Gloves and safety glasses: Protect yourself from injury.
Steps:
1. Safety First: Disconnect the negative battery cable. Support the truck securely on jack stands.
2. Preparation: Locate your motor mounts. On a '78 Ram, they're typically located at the front and sides of the engine. Liberally apply penetrating oil to all the bolts. Allow it to soak for several hours, or preferably overnight.
3. Engine Support: Use an engine support bar to securely support the engine's weight. This is absolutely crucial to prevent it from falling or shifting during the process.
4. Remove Old Mounts: This is the most challenging part. You'll need to carefully remove the bolts securing the motor mounts to both the engine and the frame. Use the appropriate sockets and wrenches. A pry bar may be necessary to help separate the mounts from their mounting points. Be patient and avoid forcing anything. If a bolt breaks, you may need an extraction tool.
5. Clean Mounting Surfaces: Thoroughly clean the engine and frame mounting surfaces where the old mounts were attached. Remove any debris, rust, or old sealant.
6. Install New Mounts: Carefully align the new motor mounts with their corresponding mounting points on the engine and frame. Install the bolts and tighten them by hand initially.
7. Torque to Spec: Use a torque wrench to tighten the bolts to the manufacturer's specified torque. This is critical to ensure the mounts are properly secured and prevent damage. Consult your repair manual for the correct torque values.
8. Lower the Engine Support: Carefully lower the engine support bar, ensuring the engine remains stable.
9. Reconnect Battery: Reconnect the negative battery cable.
10. Test Drive: Carefully test drive the truck to ensure the mounts have resolved the issue. Pay close attention to vibrations and any unusual noises.
Important Considerations:
* Engine Size: The process can vary slightly depending on whether you have a 318, 360, or other engine.
* Manual vs. Automatic Transmission: The location and accessibility of the mounts might differ.
* Rust: Rust is a significant problem with older vehicles. Be prepared for extremely stubborn bolts that may require significant effort and even replacement.
* Repair Manual: Having a repair manual specific to your truck is essential. It will provide detailed diagrams, torque specifications, and troubleshooting tips.
Disclaimer: This is general guidance. Improperly performing this repair could result in serious injury or damage to your vehicle. If you are not comfortable performing this repair yourself, take your truck to a qualified mechanic.
