2024 Jeep Wrangler Coolant Capacity & Type Guide

The 2024 Jeep Wrangler holds between 9.4 and 14.1 quarts (8.9 to 13.4 liters) of engine coolant, depending on the specific engine and powertrain configuration you have. As an ASE-certified master technician, I constantly get questions about maintaining the cooling system on the JL-generation Wrangler. Proper cooling system maintenance is critical for these rigs, especially if you take them off-road, crawl trails at low speeds, or tow.

Quick Answer

If you are looking to top off or perform a complete coolant flush on your 2024 Jeep Wrangler, here is the essential information you need at a glance:

• Total Cooling System Capacity: 9.4 to 14.1 quarts (8.9 - 13.4 liters) depending on the engine.
• OEM Coolant Spec: Mopar 10-Year/150,000 Mile Formula OAT (Organic Additive Technology). It is purple in color and meets Chrysler material standard MS-12106. Never mix this with the older orange HOAT coolant (MS-9769), as it will gel and destroy your cooling system.
• Mix Ratio: 50/50 mixture of concentrated OAT coolant and distilled water, or a pre-mixed 50/50 solution.

Capacity by Engine Option

The 2024 Jeep Wrangler is available with several different powerplants, including mild-hybrids (eTorque) and plug-in hybrids (4xe), which feature complex, multi-loop cooling systems. Below is a breakdown of the primary engine cooling system capacities:

Note: The 4xe plug-in hybrid features additional dedicated cooling loops for the high-voltage battery and power electronics. Servicing the PHEV battery cooling system often requires dealership-level diagnostic software to properly bleed.

Flush Interval

Keeping your coolant fresh is vital to preventing internal corrosion and protecting your water pump bearings.

• Normal Duty: Stellantis (Jeep) recommends replacing the OAT coolant every 10 years or 150,000 miles, whichever comes first.
• Severe Duty: If you frequently take your Wrangler off-road, drive in heavy dust, idle extensively, tow, or operate in extreme heat, I highly recommend flushing the system every 5 years or 100,000 miles.

How to Refill & Bleed

Modern Jeeps, especially the 2.0L Turbo and 4xe models, are notoriously difficult to bleed using traditional methods due to the routing of heater hoses and secondary cooling circuits.

1. Drain the System: Locate the radiator drain petcock on the lower passenger side of the radiator. Drain the old coolant into a catch pan.
2. Use a Vacuum Fill Tool: I strongly recommend using a pneumatic vacuum coolant filler (Airlift tool) for the JL Wrangler. This tool pulls the entire cooling system into a deep vacuum, checking for leaks before seamlessly pulling the new coolant into every crevice without introducing air pockets.
3. Traditional Spill-Free Funnel (If vacuum tool is unavailable): Attach a spill-free funnel to the radiator neck. Fill the system slowly with a 50/50 OAT mix.
4. Bleed the Air: Start the engine and turn the climate control heat to "High" with the blower on a low setting. Let the engine reach operating temperature so the thermostat opens.
5. Use the Bleed Screw: On the 3.6L V6, locate the air bleed screw on the thermostat housing. Open it slightly while the engine is running until a steady stream of coolant (without air bubbles) comes out, then snug it back down.
6. Final Top-Off: Shut the engine off, let it cool completely, and ensure the coolant recovery reservoir is at the "MAX" line.

Common Cooling System Issues

If you own a JL-generation Wrangler, keep an eye out for these known cooling system weak points:

• Radiator Seam Leaks: The crimped seams where the aluminum core meets the plastic end tanks are prone to weeping over time, often producing a faint smell of sweet coolant before a visible puddle forms.
• Water Pump Failure (3.6L V6): The Pentastar V6 is known for premature water pump bearing wear. Listen for a high-pitched whine or grinding noise from the front of the engine, or look for purple crust behind the water pump pulley.
• Thermostat Housing Leaks: The composite plastic thermostat housings can warp or crack after thousands of heat cycles, leading to localized leaks on top of the engine block.
• Air Locks in 2.0L / 4xe Models: If the system isn't bled properly using a vacuum tool, trapped air can cause erratic temperature gauge spikes and poor heater performance.

Taking care of your Wrangler's cooling system will ensure it gets you to the trail and back home safely. Find a trusted shop on Repairius.