2018 Toyota Corolla: Coolant Capacity & Type
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.
Working on this 2018 Toyota Corolla? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
The 2018 Toyota Corolla holds between 6.1 and 6.3 quarts (5.8-6.0 Liters) of coolant, depending on the engine option.
Quick Answer
- Total Cooling System Capacity: 6.1 qts (5.8 L) for the 1.8L 2ZR-FE engine and 6.3 qts (6.0 L) for the 1.8L 2ZR-FAE engine.
- OEM Coolant Specification: Toyota Super Long Life Coolant (SLLC), which is a pink, P-HOAT (Phosphated Hybrid Organic Acid Technology) coolant.
- Mix Ratio: 50/50 with distilled water. Toyota SLLC is typically sold as a pre-mixed 50/50 solution.
Capacity by Engine Option
The 2018 Toyota Corolla was offered with two variations of the 1.8L 4-cylinder engine, leading to a slight difference in total cooling system capacity.
| Engine | Liters | Quarts |
|---|---|---|
| 1.8L I-4 (2ZR-FE) | 5.8 L | 6.1 qts |
| 1.8L I-4 (2ZR-FAE) | 6.0 L | 6.3 qts |
Flush Interval
Toyota recommends the first coolant flush for the 2018 Corolla at 100,000 miles or 10 years, and every 50,000 miles or 5 years thereafter for both normal and severe duty service.
How to Refill & Bleed
When refilling the cooling system on a 2018 Toyota Corolla, it is crucial to properly bleed the air out to prevent overheating. While a vacuum-fill tool is the most efficient method, you can bleed the system manually.
- Mix Coolant: If using concentrate, mix it 50/50 with distilled water. Pre-mixed coolant is recommended.
- Fill Slowly: With the engine off and cool, slowly add coolant to the radiator until it is full.
- Fill Reservoir: Add coolant to the overflow reservoir until it reaches the "FULL" line.
- Start Engine: Leave the radiator cap off and start the engine. Turn the heater to the highest temperature setting and the fan to low.
- Bleed Air: As the engine warms up, you will see air bubbles coming out of the radiator filler neck. Continue to add coolant as the level drops.
- Replace Cap: Once the bubbling stops and the engine reaches operating temperature, carefully replace the radiator cap.
- Check Reservoir: After the engine has cooled down completely, re-check the coolant level in the overflow reservoir and top off as needed.
Common Cooling System Issues
This generation of the Toyota Corolla is well-regarded for its reliability. Cooling system issues are not widespread, but like any vehicle, certain problems can arise over time.
- Water Pump: While not a frequent problem, water pump failure is the most likely major cooling system repair. Symptoms include a coolant leak from the front of the engine, a whining noise that changes with engine RPM, or an overheating condition.
- Radiator Leaks: Over time, the plastic end tanks of the radiator can become brittle and crack, leading to leaks.
- Thermostat: A stuck thermostat can cause the engine to either overheat or fail to reach operating temperature. This is a relatively simple and inexpensive repair.
Find a trusted shop on Repairius.
More specs for the 2018 Toyota Corolla
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
2018 Toyota Corolla Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.