1. Safety First:
* Disconnect the battery: This is crucial to prevent accidental sparks. Disconnect the negative (-) terminal first.
* Ventilation: Work in a well-ventilated area. Gasoline fumes are highly flammable and dangerous. If working in a garage, open the doors and windows.
* Fire extinguisher: Have a fire extinguisher readily available. A Class B or ABC extinguisher is recommended.
* Gloves and safety glasses: Protect yourself from potential cuts, abrasions, and gasoline contact.
* Jack stands: Never work under a car supported only by a jack. Use jack stands for secure support.
2. Preparation:
* Locate the gas tank straps: These are typically located on either side of the gas tank, connecting it to the vehicle's undercarriage.
* Identify the bolts: Note their size and type (e.g., standard, metric, bolt head type). Take pictures if you're unsure.
* Gather tools: You'll need a socket wrench (likely metric) with the correct size socket, a ratchet, possibly an extension, and a penetrating oil (like PB Blaster). A torque wrench is also highly recommended for tightening the new bolts to the correct specification (consult your repair manual).
3. Removing the Old Bolts:
* Access the bolts: You may need to remove some underbody panels or shields to gain access to the gas tank straps.
* Apply penetrating oil: Spray penetrating oil on the bolts, allowing it to soak for 15-20 minutes. This helps loosen them.
* Remove the bolts: Carefully loosen and remove the bolts using the appropriate socket and ratchet. They may be stubborn due to rust or age. If they are very difficult, use a breaker bar for extra leverage. Be gentle to avoid stripping the bolt heads.
4. Installing the New Bolts:
* Clean the bolt holes: Use a wire brush or compressed air to clean any rust or debris from the bolt holes.
* Install the new bolts: Carefully thread the new bolts into the holes. Hand-tighten them first.
* Tighten the bolts: Use a socket wrench and ratchet to tighten the bolts evenly. Do not overtighten. Use a torque wrench if you have one, and consult your repair manual for the correct torque specification. Overtightening can damage the gas tank or its straps.
5. Reassembly:
* Replace any removed panels or shields.
* Reconnect the battery.
Important Considerations:
* Repair Manual: A repair manual specific to your 1990 Dodge Dynasty is highly recommended. It will provide detailed instructions, diagrams, torque specifications, and other valuable information.
* Gas Tank Support: Depending on the condition of the straps and the car's age, consider replacing the entire strap assembly, not just the bolts. Worn straps could lead to tank damage and potential leakage.
* Professional Help: If you are not comfortable working on your vehicle, consider taking it to a qualified mechanic. This is especially important given the potential safety hazards associated with working near a fuel tank.
This process outlines the general procedure. Specific steps and difficulties may vary depending on the condition of your vehicle. Always prioritize safety and consult a repair manual for detailed instructions specific to your 1990 Dodge Dynasty.
