1.6L DOHC MPI Engine Complete Assembly for 2020-2023 Hyundai & Kia • Accent, Rio

A quick look at your own vehicle makes sure the right engine shows up:

• Verify the 8th digit of the 17-digit VIN is a '6' (for Hyundai Accent) or a 'D' (for Kia Rio).
• Verify the engine code stamped on the front-left side of the engine block near the transmission mating surface reads 'G4FM'.
• Confirm the engine is naturally aspirated and does not have a high-pressure fuel pump mounted on the valve cover.

What the install really takes — plan and budget with confidence:

Special tools this job needs:

• Engine hoist/crane with a load leveler
• Flywheel/flexplate holding tool
• Professional-grade, bi-directional scan tool

Budget for these consumables at install:

• Engine Oil: 0W-20 fully synthetic oil meeting API SN Plus, API SP, ILSAC GF-6, or ACEA C5/C6 specifications (3.8 quarts / 3.6 liters capacity)
• Oil Filter: Genuine OEM Hyundai/Kia oil filter recommended to prevent dry-start timing chain rattle
• Coolant: Phosphate-based Ethylene Glycol coolant formulated specifically for aluminum radiators
• Spark Plugs: Four new Iridium spark plugs (gap: 1.1 mm / 0.043 in), torqued to 23 Nm (17 lb-ft)
• Gaskets: New intake manifold gaskets, exhaust manifold gasket, and thermostat gasket
• Serpentine Belt: Inspect and replace if necessary

What your vehicle’s computers will need after the swap:

What’s involved: Crankshaft Position (CKP) sensor relearn, throttle body idle air volume relearn, clearing of ECU/TCM adaptive learning values, and potential immobilizer re-sync.

Sources differ on the exact electronic syncing required. While the engine does not require VIN-specific dealer programming to physically run, a professional-grade diagnostic scan tool is highly recommended to perform necessary relearn procedures (such as Crankshaft Position Sensor Relearn and clearing transmission adaptive learning values for the IVT). Some sources suggest cloning the original ECU data to the replacement unit to avoid immobilizer or key-related compatibility issues. Confirm with us before install.

Pro tips for a smooth first start-up — hand them to whoever does the install:

• Intelligent Variable Transmission (IVT) Alignment: Ensure the torque converter is fully and deeply seated into the transmission fluid pump before bolting the bellhousing together to avoid cracking the pump.
• Fragile Dual-Port Injector Connectors: Plastic locking tabs on the injector connectors become extremely brittle from engine heat; handle with extreme care.
• Torque-to-Yield Crankshaft Bolt: The crankshaft pulley bolt is a torque-to-yield fastener and must be replaced with a new OEM part; reusing it can cause timing failure.
• Ground Strap Placement: Ensure all engine and transmission ground straps are clean, secure, and reconnected to their exact factory locations to prevent communication trouble codes.
• Crankshaft Pulley Bolt Clearance: The crankshaft pulley bolt sticks out and can interfere with removal, sometimes requiring temporary removal to gain clearance.

Easy to get right once you know them:

• Confusing DPFI with GDI Engines: Ordering this engine to replace the older 1.6L Gamma GDI engine (G4FD) found in 2018-2019 models. The older GDI engine features a high-pressure mechanical fuel pump on the valve cover, which the G4FM does not have.
• Reusing Stretched Fasteners: Attempting to reuse torque-to-yield cylinder head bolts or crankshaft pulley bolts.
• Failing to Prime the Oil System: Starting the engine dry after storage without priming the oiling system first.
• Neglecting Transmission Fluid Top-Off: Failing to top off the transmission with the correct, proprietary SP-CVT1 fluid after losing fluid from cooler lines during swap.
• Assuming Plug-and-Play Electronics: Expecting the engine to run perfectly without performing necessary electronic handshakes, sensor relearns, or addressing potential immobilizer issues.
• Ignoring Fluid System Contamination: Failing to flush the oil cooler, radiator, and lines if the previous engine suffered a catastrophic failure.

Not issues with the units on this page — the manufacturer documented these for every engine of this family, wherever you buy one. Handy for your installer: