Repair Guide: Radiator Leak on 1978 Dodge Challenger

Repair Guide: Radiator Leak on 1978 Dodge Challenger

Repair Guide: Radiator Leak on 1978 Dodge Challenger

This step-by-step guide details how to diagnose and repair a radiator leak that can occur on a 1978 Dodge Challenger—a less common issue but significant enough to warrant attention.

Tools Required

Diagnostic Steps

  1. Wear protective gloves and eyewear for safety.
  2. Ensure the car is cool before beginning the diagnosis to avoid burning hazards. Do not remove the radiator cap while the car is hot.
  3. Start by visually inspecting the radiator for any signs of leakage. If coolant is spotted underneath the front of the vehicle, it may indicate a radiator leak.
  4. Use a radiator pressure tester by attaching it to the coolant reservoir or in place of the radiator cap. Pump the pressure tester to the appropriate PSI per your vehicle's specifications. This will help identify any leak points.
  5. If leakage is observed, note the location of the leak for the following repair steps.

Repair Steps

  1. Place a drain pan underneath the radiator drain valve.
  2. Slowly unscrew the radiator's drain plug to allow the coolant to drain out into the pan. Be mindful as the coolant can still be hot and can cause burns.
  3. Once the coolant drains completely, close the drain plug.
  4. Apply the radiator stop leak compound to the area of the radiator where the leak was diagnosed. Follow the specific instructions on the product packaging for application.
  5. After applying the leak compound, leave it to dry completely. Check manufacturer’s specifics for drying time.
  6. Once the compound is dry, refill the radiator with coolant to the appropriate level as per your vehicle's specifications.
  7. Reattach the radiator cap and start your vehicle. Let it idle for a few minutes to reach operating temperature, then inspect the leak area to ensure the leak has been stopped.

Pro Tips & Pitfalls

Pro Tips: The use of a radiator stop leak is a temporary solution. It is recommended to replace the damaged radiator for a more permanent solution. Do not attempt to scrape excess stop leak compound off the radiator after application. This can unintentionally create or enlarge the leak.

Pitfalls: Never open the radiator cap of a hot engine. Hot coolant can cause severe burns. Misplacement of the radiator stop leak can lead to blockages. Excessive use of the stop leak can potentially cause other issues, such as blockage of the radiator tubes, and negatively impact the cooling efficiency.