An exact 1998cc displacement paired with block casting G4KD defines this Kia Sportage Optima Forte G4KD Remanufactured Engine. Built for California emissions vehicles, this 2.0L 4-Cylinder 16-Valve long block replaces worn Theta II engines. Machine shop assembly demands manual verification of oil pressure relief valves before start-up to avoid hydraulic timing chain tensioner collapse.

The cast aluminum crankcase features parent bore architecture reinforced with spun-cast iron cylinder liners and casting G4KD. A balanced forged steel crankshaft spins on precision tri-metal connecting rod bearings. Double overhead camshafts actuate 16 valves through bucket lifters to maintain valvetrain stability. Dry long block weight totals 250 lbs. Crated envelope dimensions measure 36in length by 36in width by 36in height. The steel oil pan reservoir holds 4.5 quarts of engine oil.

Key Features of Kia G4KD

Automotive service professionals buy Kia G4KD remanufactured engine assemblies to eliminate rod knock and restore factory emissions performance. This precision remanufactured long block provides reliable combustion sealing across compact car and crossover applications.

- Block cast G4KD receives precision CNC deck resurfacing to secure flat cylinder head gasket seal.
- Connecting rod journals undergo micro-polishing to hold a 0.0003in TIR runout tolerance.
- Plateau-honed cylinder sleeves provide excellent oil control and seating for low-tension piston rings.
- Align-honed main bearing saddles maintain hydrodynamic oil film stability under high RPM load.
- Intake and exhaust camshaft lobes meet strict OEM profile specifications to ensure factory airflow.
- Multi-layer steel cylinder head gaskets seal against combustion pressures up to 200 PSI.
- Torque-to-yield cylinder head fasteners eliminate thermal distortion across the aluminum cylinder block.

Dyno Load Precision Machining Tolerances

Dyno testing verifies 156 HP at 6,200 RPM and 144 ft-lbs of torque at 4,500 RPM under load cell calibration. Crankshaft journal runout measures 0.0003in TIR while connecting rod oil clearances hold between 0.0012in and 0.0015in. Diamond plateau cylinder honing creates a 12 to 16 Ra surface texture for piston ring seating. Bench pressure monitors verify hot oil pressure at 58 PSI at 3,000 RPM with coolant maintained at 192°F. Compression testing confirms 185 PSI across all 4 cylinders for balanced combustion chamber efficiency. Machinists set piston-to-wall clearance at 0.0013in to prevent cylinder scuffing.

Vehicle Fitment Drivetrain Guide

This remanufactured engine fits 2011 to 2013 Kia Forte and 2011 to 2013 Kia Forte Koup models equipped with the 2.0L 1998cc 4-Cylinder engine and California emissions package. Compatible blocks display casting mark G4KD. Drivetrain compatibility includes FWD applications mated to 6-Speed manual or 6-Speed automatic transmissions. This long block does not fit 2.4L Forte SX models, turbocharged 1.6L variants, or federal emissions chassis without secondary air injection provisions.

Installation Protocol Service Requirements

Inspect electronic drive-by-wire throttle connections and check front subframe motor mounts before lowering the engine into place. Installers must flush the oil cooler lines and replace the radiator assembly to purge abrasive particles from past engine failure. Never operate this non-turbo engine with aftermarket boost levels above factory compression limits.

- Pre-fill the oil filter and prime engine oil galleries with 5W-20 oil before starter rotation.
- Drain the initial break-in oil and install a fresh oil filter at 500 miles.
- Conduct regular synthetic engine oil changes at 3,000 miles to keep CVVT oil passages clear.

Warranty Terms Core Return Policy

Each long block comes with a 3-Year Unlimited-Mile parts warranty for professional service protection. Return the rebuildable engine core within 30-day delivery terms using pre-arranged prepaid freight. Crate shipments include the long block assembly, pre-installed timing components, oil pan, valve cover, and machine shop specification sheets.