2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF)

JF / Sedan / Global (main markets: South Korea, North America, Europe, Australia)

G4KHNu 2.4L Theta II MPI1.6 T-GDI2.0 GDI Theta II2.0 CRDi2.2 CRDiExakter Jahres-/Varianten-DatensatzGold

Engine identity

Engine code

G4KH, Nu 2.4L Theta II MPI, 1.6 T-GDI, 2.0 GDI Theta II, 2.0 CRDi, 2.2 CRDi

Engine summary

Multiple engine variants depending on market: 2.4L naturally aspirated gasoline (G4KH), 1.6L turbo GDI, 2.0L turbo GDI gasoline engines, and 2.0L/2.2L CRDi diesel engines for select markets.

Displacement

2359cc, 1591cc, 1999cc, 1995cc, 2199cc

Power

185-190 hp, 178 hp, 245 hp (2.0 turbo GDI), 185 hp (2.0 CRDi), 197 hp (2.2 CRDi)

Torque

241-245 Nm, 264 Nm (1.6T), 352 Nm (2.0T GDI), 400 Nm (2.0 CRDi), 441 Nm (2.2 CRDi)

Fuel system

Gasoline direct injection (GDI) for turbocharged engines; multi-point injection for 2.4L NA; common rail diesel injection for CRDi.

Timing drive

Chain driven timing system (gasoline); timing belt with tensioner on some diesel variants.

OBD-Port

Verify by VIN and market

Oils and fluids

Öltyp

API SN or higher, SAE 5W-30 or as per country-specific climate, synthetic preferred.

Ölmenge

Approx. 5.4L service-fill including filter change (varies by engine code).

Kühlmittel

Approx. 8.5L (engine and radiator system).

Flüssigkeit

Manufacturer recommended ATF, typically SP-IV or equivalent.

Differential fluid

Specified only for AWD variants (Australia), GL-5 75W-90 gear oil.

Bremsflüssigkeit

DOT 3 or DOT 4 brake fluid recommended.

Service and parts data

Manual transmission

Limited; 6-speed manual in selected markets/engines only.

Automatic transmission

6- or 8-speed automatic transmissions depending on engine and market.

Spark plugs

Iridium or platinum spark plugs; gap ~0.044 inches (1.1 mm).

Service interval

Typically 15,000 km/12 months oil and filter change; specifics vary by market and oil type.

Reifengrößen

215/55 R17, 235/45 R18, 235/40 R19

Radmoment

Verify by VIN and market

Common and chronic problems

Timing chain noise on some 2.0 turbo engines
Oil consumption noted in some 2.4L engines

First checks

Check timing chain condition and tension
Inspect turbocharger operation on turbo variants
Verify maintenance history on oil changes

Vor dem Teiletausch

Save fault codes and freeze-frame data before clearing anything.
Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

Engine availability and specs vary significantly by market and emissions regulations.
Tires and brakes may differ in sport vs standard trims; this profile is based on mainline technical data.

Häufige Codes

Source and verification notes

Kia worldwide technical manuals and parts catalogs 2018
Global automotive databases and verified service manuals including SAE J1930 standard documents

Kompatible Werkzeuge

Verify by VIN and market

Häufige Fragen

What engine code does the 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) use? 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) is listed here with engine code G4KH, Nu 2.4L Theta II MPI, 1.6 T-GDI, 2.0 GDI Theta II, 2.0 CRDi, 2.2 CRDi; engine summary: Multiple engine variants depending on market: 2.4L naturally aspirated gasoline (G4KH), 1.6L turbo GDI, 2.0L turbo GDI gasoline engines, and 2.0L/2.2L CRDi diesel engines for select markets..
What oil and capacity does the 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) use? 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) is listed with API SN or higher, SAE 5W-30 or as per country-specific climate, synthetic preferred. and oil capacity Approx. 5.4L service-fill including filter change (varies by engine code).. Confirm market and engine option before service.
What are common 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) problems? Highlighted checks for 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF): Timing chain noise on some 2.0 turbo engines, Oil consumption noted in some 2.4L engines.

Engine identity

Engine code

G4KH, Nu 2.4L Theta II MPI, 1.6 T-GDI, 2.0 GDI Theta II, 2.0 CRDi, 2.2 CRDi

Engine summary

Multiple engine variants depending on market: 2.4L naturally aspirated gasoline (G4KH), 1.6L turbo GDI, 2.0L turbo GDI gasoline engines, and 2.0L/2.2L CRDi diesel engines for select markets.

Displacement

2359cc, 1591cc, 1999cc, 1995cc, 2199cc

Power

185-190 hp, 178 hp, 245 hp (2.0 turbo GDI), 185 hp (2.0 CRDi), 197 hp (2.2 CRDi)

Torque

241-245 Nm, 264 Nm (1.6T), 352 Nm (2.0T GDI), 400 Nm (2.0 CRDi), 441 Nm (2.2 CRDi)

Fuel system

Gasoline direct injection (GDI) for turbocharged engines; multi-point injection for 2.4L NA; common rail diesel injection for CRDi.

Timing drive

Chain driven timing system (gasoline); timing belt with tensioner on some diesel variants.

OBD-Port

Verify by VIN and market

Oils and fluids

Öltyp

API SN or higher, SAE 5W-30 or as per country-specific climate, synthetic preferred.

Ölmenge

Approx. 5.4L service-fill including filter change (varies by engine code).

Kühlmittel

Approx. 8.5L (engine and radiator system).

Flüssigkeit

Manufacturer recommended ATF, typically SP-IV or equivalent.

Differential fluid

Specified only for AWD variants (Australia), GL-5 75W-90 gear oil.

Bremsflüssigkeit

DOT 3 or DOT 4 brake fluid recommended.

Service and parts data

Manual transmission

Limited; 6-speed manual in selected markets/engines only.

Automatic transmission

6- or 8-speed automatic transmissions depending on engine and market.

Spark plugs

Iridium or platinum spark plugs; gap ~0.044 inches (1.1 mm).

Service interval

Typically 15,000 km/12 months oil and filter change; specifics vary by market and oil type.

Reifengrößen

215/55 R17, 235/45 R18, 235/40 R19

Radmoment

Verify by VIN and market

Häufige Fragen

What engine code does the 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) use? 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) is listed here with engine code G4KH, Nu 2.4L Theta II MPI, 1.6 T-GDI, 2.0 GDI Theta II, 2.0 CRDi, 2.2 CRDi; engine summary: Multiple engine variants depending on market: 2.4L naturally aspirated gasoline (G4KH), 1.6L turbo GDI, 2.0L turbo GDI gasoline engines, and 2.0L/2.2L CRDi diesel engines for select markets..

What oil and capacity does the 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) use? 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) is listed with API SN or higher, SAE 5W-30 or as per country-specific climate, synthetic preferred. and oil capacity Approx. 5.4L service-fill including filter change (varies by engine code).. Confirm market and engine option before service.

What are common 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF) problems? Highlighted checks for 2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF): Timing chain noise on some 2.0 turbo engines, Oil consumption noted in some 2.4L engines.

2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Vor dem Teiletausch

Important notes

Scanning Engine...

2018 KIA Optima G4KH/Nu 2.4L Theta II MPI (JF)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Vor dem Teiletausch

Important notes