2018 Ram ProMaster A/C Refrigerant and Oil Specifications
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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Quick Answer
- Refrigerant Type: R-1234yf
- Full System Charge: 19.4 oz (550g)
- PAG Oil Type: Mopar ND-12 (PAG 46)
- PAG Oil Capacity: 4.1 oz (120 mL)
- Low-Side Port Location: Near the firewall on the passenger side
- High-Side Port Location: Behind the grille, near the condenser
Disclaimer: Always verify the refrigerant type and charge amount on the under-hood sticker before servicing.
Why R-1234yf Matters
The 2018 Ram ProMaster uses R-1234yf refrigerant, a newer, more environmentally friendly alternative to the older R-134a. While better for the planet, R-1234yf has a few implications for service:
- Cost: R-1234yf is significantly more expensive than R-134a.
- EPA Regulations: It is illegal to top off an A/C system with R-1234yf. The system must be evacuated and recharged with the precise amount of refrigerant specified by the manufacturer.
- Equipment: Servicing R-1234yf systems requires a dedicated recovery machine to prevent cross-contamination.
Recharge Procedure
A proper A/C recharge on a 2018 Ram ProMaster is not a simple top-off. The system must be fully evacuated to remove any air or moisture, which can cause damage and poor performance. The correct charge is determined by weight, not pressure. Pressure readings can be misleading and can result in overcharging, which can damage the compressor.
Common A/C Problems for This Vehicle
While generally reliable, the Ram ProMaster's A/C system can experience a few common issues:
- Compressor Failures: The A/C compressor is a common failure point. If the compressor fails, the system must be flushed to remove any debris before a new compressor is installed.
- Condenser Issues: The condenser is located at the front of the vehicle and is susceptible to damage from road debris.
- Evaporator Leaks: The evaporator is located inside the dashboard and can be difficult to access for repair.
When to Call a Pro
While some basic A/C maintenance can be performed by a knowledgeable DIYer, any work involving the refrigerant requires specialized equipment and EPA 609 certification. If you are not certified, it is best to leave A/C work to the professionals. A certified technician will have the proper equipment to safely and effectively service your A/C system.
Find a certified A/C shop on Repairius.
More specs for the 2018 Ram ProMaster
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.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
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.
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
2018 Ram ProMaster 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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