2022 Jeep Grand Cherokee — Coolant Capacity & Type

The 2022 Jeep Grand Cherokee holds approximately 10.5–14.5 quarts (10.0–13.7 liters) of engine coolant, depending on engine and configuration; see per-engine details below.

Quick answer

• Total cooling system capacity (approx.): 10.5–14.5 qt (10.0–13.7 L), engine-dependent
• OEM coolant spec: Mopar Antifreeze/Coolant 10 Year/150,000 Mile OAT — purple, Organic Acid Technology (OAT), MS-12106. Do not mix with older HOAT/IAT coolants.
• Mix ratio: 50/50 (pre-mixed Mopar OAT is recommended). If using concentrate, mix 50% coolant with 50% distilled water. For extreme cold, up to 60/40 (coolant/water) max.

Capacity by engine option

Notes:

• The 4xe also has a separate low‑temperature (hybrid/electronics) cooling loop with its own reservoir and OAT coolant; capacity varies by build and is serviced separately. Refer to hybrid service procedures.
• Actual refill volume during routine service may be less than total capacity if some coolant remains in the block/heater core. Always measure what drains and verify level after heat‑cycle.

Flush interval

• Normal service: 10 years or 150,000 miles (240,000 km), per Mopar OAT MS‑12106 coolant guidance.
• Severe duty (frequent towing, desert heat, extended idling): testing the coolant annually after 5 years is prudent; many shops shorten to about 5 years/100,000 miles as preventive maintenance. Always maintain the correct OAT chemistry.

How to refill & bleed

1. Start with a cold engine. Set the heater to full hot. Safely raise the front of the vehicle slightly to encourage air to migrate to the degas bottle.
2. Drain: Use the radiator draincock (if equipped) or remove the lower radiator hose. Catch and measure what comes out.
3. Close drains and connect a vacuum fill tool if available (Mopar strongly recommends vacuum-fill on these systems to prevent trapped air). Draw vacuum and fill with Mopar OAT 50/50 premix.
4. If you do not have a vacuum tool: Fill the pressurized degas bottle to the COLD mark with 50/50. If equipped, open the small bleeder screw on the thermostat housing/water outlet or heater line until a steady, bubble‑free stream appears, then close it. Some engines do not have an external bleeder and rely on the degas system.
5. Start the engine and let it idle with the heater on. As the thermostat opens, the level in the bottle may drop—top up to the COLD mark as needed. Bring the engine to operating temp and allow the cooling fans to cycle at least once.
6. Shut off and let fully cool. Recheck and set level to the COLD mark. Verify strong cabin heat and no overheating. Reinspect for leaks after a few drives and recheck the level again when cold.

Tips:

• Use only Mopar OAT MS‑12106 (purple). Mixing with HOAT (orange/yellow) or universal green can cause gel/sludge and heater‑core restriction.
• Replace the pressure cap if it won’t hold rated pressure or if you observe crust around the seal.

Common cooling system issues on this generation

• Water pump seep/leak: The 3.6L V6 commonly develops weep‑hole seepage as mileage climbs; look for dried pink/purple residue and a chirp/squeal at the pump.
• Thermostat or housing faults: Stuck‑open thermostats cause slow warm‑up/P0128 codes; stuck‑closed can cause rapid overheating. Plastic housings or quick‑connect seals may also seep.
• Electric cooling fan/module problems: A failed fan motor, module, or wiring can lead to overheating at idle or with A/C on. Listen for fan engagement and watch for temperature rise when stationary.
• Degas (expansion) bottle or cap issues: Cap that won’t hold pressure or bottle seam cracks can vent coolant, leaving a sweet smell and low level over time.
• Hose and quick‑connect O‑ring leaks: After service, recheck connections—minor nicks or mis‑seated O‑rings can cause slow leaks.
• Air pockets after service: Insufficient bleeding can trap air, causing intermittent heater output or hot‑then‑cold gauge behavior. Vacuum‑filling or careful bleeding prevents this.
• 4xe specifics: Auxiliary electric coolant pumps and valves manage multiple loops; faults can set hybrid cooling DTCs or reduce performance. Hybrid loops require their own bleed procedure—follow service info and use the correct OAT coolant only.

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