2019 Jeep Grand Cherokee — Coolant Capacity & Type

The 2019 Jeep Grand Cherokee holds roughly 10.5–17.0 quarts (10.0–16.1 liters) of engine coolant depending on the engine; the supercharged Trackhawk also has a separate intercooler circuit serviced independently.

Quick answer

• Total cooling system capacity: 10.5–17.0 qt (10.0–16.1 L), engine-dependent
• OEM coolant spec: Mopar 10 Year/150,000 Mile OAT Antifreeze/Coolant, purple, OAT chemistry, MS-12106 (do not mix with older HOAT/IAT coolants)
• Mix ratio: 50/50 with distilled water (use Mopar pre-mix or mix concentrate yourself; up to 60/40 in extreme cold only)

Capacity by engine option

Values below reflect the approximate total cooling system fill after a full drain. Actual refill volume can vary slightly with options, radiator size, and how thoroughly the system is drained.

• 3.6L Pentastar V6 (ERB): about 10.5–12.0 qt (10.0–11.4 L)
• 5.7L HEMI V8 (EZH): about 14.0–15.5 qt (13.2–14.7 L)
• 6.4L SRT V8 (ESF): about 15.0–16.0 qt (14.2–15.1 L)
• 6.2L Supercharged V8 Trackhawk (ESD): engine cooling loop about 16.0–17.0 qt (15.1–16.1 L); plus a separate low‑temperature intercooler circuit (capacity varies and is serviced separately)

Tip: Measure what you drain and plan your refill volume from that number; a vacuum fill will usually accept closer to the full system capacity.

Flush interval

• Normal service: Mopar OAT is rated for up to 10 years or 150,000 miles (240,000 km), whichever comes first.
• Severe duty (frequent towing, high ambient temps, lots of short trips): many shops service around 5 years/100,000 miles as a preventive interval and test freeze/boil protection annually after year five.

Important: Use only Mopar OAT (purple, MS‑12106). Do not top off with older orange/yellow HOAT or green IAT. If mixed or contaminated, perform a complete drain and distilled‑water flush before refilling with the correct OAT.

How to refill & bleed

1. Start with a fully cool engine. Raise the front slightly if you’re not vacuum‑filling.
2. Drain: Open the radiator petcock (if equipped) or remove the lower radiator hose. Catch and properly dispose of old coolant. Some engines have no block drains—expect some coolant to remain unless vacuum‑extracted.
3. Close drains/hoses. If using concentrate, premix 50/50 with distilled water.
4. Preferred method: Use a vacuum fill tool to pull the system down and ingest the premixed coolant—this minimizes air pockets on WK2 vehicles.
5. Gravity/spill‑free method: Install a spill‑free funnel on the degas bottle. Crack open the small bleed screw (if equipped) on the thermostat/water outlet area near the upper hose; on the 3.6L it’s on the plastic outlet, and on HEMI engines it’s near the crossover. Fill until coolant flows air‑free from the bleeder, then close it.
6. Set the cabin heat to HOT with the blower low. Start the engine, let it idle and warm up. As the thermostat opens and the level drops, keep the funnel about half full and continue topping up.
7. Watch for steady cabin heat, stable gauge temperature, and radiator fan cycling. Lightly squeeze the upper hose to encourage any trapped air to move to the bottle.
8. Once bubble‑free, shut off and allow a full cool‑down. Replace the cap, road test, recheck the level cold, and top off to the “COLD” mark as needed. Inspect for leaks at the pump, hoses, radiator end tanks, and the degas cap.

Common cooling system issues (WK2 Grand Cherokee, 2016–2021)

• Water pump seepage/leaks: Seen on both 3.6L and HEMI engines as mileage accumulates; look for dried pink residue at the pump weep hole.
• Thermostat faults: Stuck‑open causes slow warm‑up and poor heat; stuck‑closed can cause overheating. Replace housing gasket/O‑ring with the stat.
• Radiator side‑tank or seam leaks: Impact damage and age can cause wetness along the plastic tank crimp areas.
• Degas bottle or cap failures: A weak cap won’t hold pressure and can cause boil‑over; always use the correct Mopar cap rating.
• Air pockets after service: Improper bleeding can lead to intermittent overheat or no‑heat complaints—vacuum fill or careful bleeding solves this.
• Heater core restriction: Most often from prior stop‑leak use or mixing coolants; system flushing and coolant replacement can restore heat, severe cases need a core.
• Trackhawk/SRT specifics: The separate intercooler (low‑temp) circuit has its own pump and heat exchangers; pump or air‑lock issues there can trigger performance‑reduction messages even when the engine cooling loop is fine.

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