why does my Ram 1500 DT (2019-Present) overheat while idling?

Solution

1. Preparation

• Gather tools: coolant, socket set, pliers, OBD-II scanner, thermometer, and safety goggles.
• Ensure the engine is cool and the vehicle is parked on a level surface.

2. Coolant Flush

1. Drain Coolant: Place a drain pan under the radiator, open the drain valve, and let the old coolant flow out.
2. Flush System: Use a garden hose to flush the radiator and engine block with water until it runs clear.
3. Reattach Drain Valve: Close the drain valve securely after flushing.

3. Replace Thermostat (if faulty)

1. Remove Thermostat: Disconnect the upper radiator hose and unbolt the thermostat housing.
2. Install New Thermostat: Place the new thermostat in the housing, ensuring it is oriented correctly. Bolt the housing back in place.

4. Inspect and Replace Water Pump (if necessary)

1. Remove Drive Belt: Use a wrench to relieve tension on the serpentine belt and remove it.
2. Unbolt Water Pump: Disconnect hoses and unbolt the water pump from the engine block.
3. Install New Water Pump: Clean the mounting surface, apply gasket maker if required, and install the new water pump. Reattach hoses and the drive belt.

5. Refill Coolant

1. Add Coolant: Fill the radiator and reservoir with the appropriate coolant type (refer to the owner’s manual for specifications).
2. Bleed System: Start the engine with the radiator cap off and allow air bubbles to escape until coolant flows steadily.