2021 Ford Ranger Coolant Capacity & Type

The 2021 Ford Ranger holds approximately 13.7 quarts (13.0 liters) of coolant in its cooling system. This guide details everything you need to know about your Ranger's coolant.

<h2>Quick Answer</h2>

• Total Cooling System Capacity: 13.7 quarts (13.0 liters)
• OEM Coolant Spec: Ford Yellow Antifreeze/Coolant, Pre-diluted 50/50 with deionized water. This is an OAT (Organic Acid Technology) coolant meeting Ford Specification WSS-M97B57-A2.
• Mix Ratio: 50/50 (pre-mixed) or 1 part concentrate to 1 part distilled water.

<h2>Capacity by Engine Option</h2>

The 2021 Ford Ranger was offered with a single engine option in North America, the 2.3L EcoBoost I4.

Engine	Capacity (Quarts)	Capacity (Liters)
2.3L EcoBoost I4	13.7	13.0

<h2>Flush Interval</h2>

Ford recommends the following coolant flush intervals for the 2021 Ranger:

• Normal Duty: Initial replacement at 100,000 miles (160,000 km) or 6 years, then every 50,000 miles (80,000 km) or 3 years thereafter.
• Severe Duty: If operating under severe conditions (e.g., heavy towing, extreme temperatures, dusty environments), an earlier flush might be beneficial. Consult your owner's manual or a Ford service professional for specific recommendations based on your driving habits.

<h2>How to Refill & Bleed</h2>

Properly refilling and bleeding the cooling system is crucial to prevent air pockets, which can lead to overheating. For the 2021 Ford Ranger, follow these general steps:

1. Safety First: Ensure the engine is cool before starting. Wear appropriate personal protective equipment (gloves, eye protection).
2. Drain the System (if performing a flush): Locate the radiator drain plug (petcock) at the bottom of the radiator. Place a drain pan underneath and open the plug. Remove the radiator cap to speed up draining. For a full flush, you may also need to drain the engine block via a plug, or flush with distilled water until clear.
3. Close Drain Plugs: Once drained, close the radiator drain plug and any other drain points.
4. Refill: Begin filling the degas bottle (coolant reservoir) with the specified Ford Yellow Antifreeze/Coolant (WSS-M97B57-A2). Fill slowly to allow air to escape.
5. Bleeding Procedure:
   • Start the engine with the heater set to maximum heat and the fan on low. This opens the heater core valve to allow coolant circulation.
   • Allow the engine to idle and reach operating temperature. Keep a close eye on the temperature gauge.
   • As the engine warms up, the thermostat will open, and the coolant level in the degas bottle may drop. Add more coolant as needed to maintain the "COLD FILL" line.
   • Gently squeeze the upper and lower radiator hoses several times to help dislodge any trapped air bubbles.
   • Continue to run the engine until the cooling fans cycle on and off at least twice, indicating proper circulation and thermostat operation.
   • After the engine cools completely, recheck the coolant level in the degas bottle and top off if necessary.

Note: The 2021 Ford Ranger 2.3L EcoBoost cooling system is largely self-bleeding through the degas bottle. There are typically no dedicated bleed screws on this system. However, slow filling and allowing the engine to cycle through several warm-up/cool-down periods will ensure air is expelled.

<h2>Common Cooling System Issues</h2>

While the 2021 Ford Ranger is a relatively modern vehicle, here are some common cooling system issues that can occur in this generation:

• Coolant Leaks: Leaks can develop from hoses, the radiator, water pump, or thermostat housing. Regularly inspect for puddles under the vehicle or signs of dried coolant residue.
• Water Pump Failure: Although less common in newer vehicles, a failing water pump can lead to overheating. Symptoms include whining noises from the engine bay or coolant leaks from the pump itself.
• Thermostat Issues: A stuck-open thermostat can cause the engine to run too cool, leading to reduced fuel efficiency. A stuck-closed thermostat is more serious, causing rapid overheating.
• Degas Bottle/Pressurized Reservoir Issues: Cracks in the plastic degas bottle or a faulty cap can lead to coolant loss and insufficient system pressure.
• Clogged Radiator/Heater Core: Over time, sediment or corrosion can restrict flow in the radiator or heater core, reducing their efficiency. This is often a result of neglecting coolant flushes or using incorrect coolant types.

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