my Cadillac Escalade T1XX (2021-Present) is leaking coolant, what should I do?

Symptoms

• Coolant puddles under the vehicle
• Low coolant level warning on the dashboard
• Overheating engine temperature gauge
• Sweet smell of coolant inside or outside the vehicle
• Poor heater performance

Diagnostic Steps

1. Inspect the ground under the vehicle for coolant puddles and identify the location of the leak.
2. Check the coolant reservoir and radiator for visible cracks or damage.
3. Inspect all hoses connected to the cooling system for signs of wear or leaks.
4. Use a pressure tester to pressurize the cooling system and identify the source of the leak.
5. Examine the water pump for signs of coolant leakage.
6. Check the heater core for leaks, especially if the cabin heater is not performing well.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and disconnect the battery to avoid electrical hazards.
• Place a drip pan under the vehicle to catch any residual coolant.

2. Identify the Leak Source

• If leaks are found in hoses or the radiator, proceed to replace the affected components.
• If a leak is suspected from the water pump or heater core, further disassembly may be needed.

3. Replace Faulty Hoses or Components

• Hoses:

  1. Loosen hose clamps and remove the damaged hose.
  2. Install the new hose, ensuring a secure fit.
  3. Tighten the hose clamps to the manufacturer’s specifications (usually around 15-25 in-lbs).

• Radiator:

  1. Remove the radiator cap and drain the coolant.
  2. Disconnect the upper and lower hoses.
  3. Remove the mounting bolts and lift the radiator out.
  4. Install the new radiator and reattach hoses and bolts.

• Water Pump:

  1. Remove the serpentine belt and any components obstructing the water pump (such as the fan or housing).
  2. Unbolt the water pump and remove it from the engine.
  3. Clean the mounting surface and install the new water pump, applying a new gasket if required.
  4. Reassemble all components and reconnect the serpentine belt.

4. Refill Cooling System

1. Fill the cooling system with the appropriate type of coolant (typically Dex-Cool for Cadillac).
2. Start the engine and let it run with the radiator cap off to allow air to escape.
3. Once the thermostat opens and coolant circulates, top off the coolant level and replace the radiator cap.