2022 Ram 2500 — Coolant Capacity & Type
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The 2022 Ram 2500 has a total cooling system capacity of up to 28.1 quarts (26.6 liters) for the 6.7L Cummins Turbo Diesel and 16.5 quarts (15.6 liters) for the 6.4L HEMI V8. The recommended coolant for both engines is a Mopar 10-year/150,000-mile OAT coolant, which is purple in color.
Quick Answer
- Total Cooling System Capacity (6.4L HEMI V8): 16.5 quarts / 15.6 liters
- Total Cooling System Capacity (6.7L Cummins): 28.1 quarts / 26.6 liters
- OEM Coolant Spec: Mopar OAT (Organic Additive Technology) meeting MS-12106, purple in color.
- Mix Ratio: 50/50 mix of coolant and distilled water.
Capacity by Engine Option
| Engine | Capacity (quarts) | Capacity (liters) |
|---|---|---|
| 6.4L HEMI V8 | 16.5 | 15.6 |
| 6.7L Cummins | 28.1 | 26.6 |
Flush Interval
- Normal Duty: 10 years or 150,000 miles, whichever comes first.
- Severe Duty: 5 years or 75,000 miles, whichever comes first.
How to Refill & Bleed
- Refill: Use a 50/50 mix of Mopar OAT coolant and distilled water.
- Bleed: The 2022 Ram 2500 has a self-bleeding cooling system. To ensure all air is purged, run the engine with the heater on high until it reaches operating temperature. Let the engine cool and top off the coolant as needed.
Common Cooling System Issues
The 2022 Ram 2500 is a relatively new vehicle, so there are not many widespread cooling system issues. However, some owners have reported minor leaks from the radiator or hoses. It is important to regularly inspect the cooling system for any signs of leaks or damage.
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More specs for the 2022 Ram 2500
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2022 Ram 2500 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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Values can vary by engine, trim and build date; check your VIN-specific service information. Updated 2026-07-13.