2021 Ford F-250 Super Duty Coolant Capacity & Type
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Quick Answer
The 2021 Ford F-250 Super Duty, depending on the engine, holds approximately 19.3 to 22.8 quarts (18.3 to 21.6 liters) of coolant in its cooling system. It requires Motorcraft Orange Antifreeze/Coolant Prediluted (VC-3-B / CVC-3-B) or Motorcraft Specialty Orange Engine Coolant concentrate (VC-3-DVC) meeting Ford specification WSS-M97B44-D.
- Total Cooling System Capacity:
- 6.2L V8: 22.8 quarts (21.6 liters)
- 7.3L V8: 19.3 quarts (18.3 liters)
- 6.7L Power Stroke Diesel: 21.7 quarts (20.55 liters)
- OEM Coolant Spec: Motorcraft Orange, P-OAT (Phosphated Organic Acid Technology), Ford Specification WSS-M97B44-D
- Mix Ratio: 50/50 prediluted or 50/50 concentrate/distilled water mix
Capacity by Engine Option
| Engine | Capacity (Quarts) | Capacity (Liters) |
|---|---|---|
| 6.2L V8 | 22.8 | 21.6 |
| 7.3L V8 | 19.3 | 18.3 |
| 6.7L Power Stroke Diesel | 21.7 | 20.55 |
Flush Interval
Ford recommends the following coolant flush intervals for the 2021 F-250 Super Duty:
- Normal Duty: Initial change at 105,000 miles (168,000 km) or 7 years, whichever comes first. Subsequent changes every 45,000 miles (72,000 km) or 3 years.
- Severe Duty (e.g., heavy towing, off-road use, extreme temperatures): Initial change at 60,000 miles (96,000 km) or 5 years, whichever comes first. Subsequent changes every 30,000 miles (48,000 km) or 2 years.
Regularly inspect coolant levels and condition, especially under severe operating conditions. Deteriorated coolant should be flushed and replaced sooner.
How to Refill & Bleed
Refilling and bleeding the cooling system on a 2021 Ford F-250 Super Duty is crucial to ensure all air pockets are removed, which can cause overheating. Here
More specs for the 2021 Ford F-250 Super Duty
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
2000 F-250 Super Duty
2001 F-250 Super Duty
2002 F-250 Super Duty
2003 F-250 Super Duty
2004 F-250 Super Duty
2005 F-250 Super Duty
Maintenance & repair guides
2021 Ford F-250 Super Duty 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 2026-06-24.