Complete removal and reinstallation of the 1.8L I4 engine from a 2015 Kia Forte, including disconnection of all systems, separation from transmission, and extraction from engine bay.

Warnings

Tools required

Parts

• Engine oil with filter × 1 — Use OEM specification
• Engine coolant × 1 — Use OEM specification
• Oil drain plug crush washer × 1 — Use OEM specification
• Exhaust manifold gasket × 1 — Use OEM specification
• Intake manifold gasket × 1 — Use OEM specification
• Transmission-to-engine seal inspection × 1 — Replace if damaged
• Engine mount hardware inspection kit × 1 — Replace worn fasteners
• Anti-seize compound × 1 — High-temperature rated
• Thread locker (medium strength) × 1 — Loctite 243 or equivalent

Fluids

• Kia Genuine 5W-20 Engine Oil — 4.5 qt
• Hyundai/Kia Long Life Coolant (Green) — 7.5 qt
• Kia SP-IV-M ATF — 2 qt
• Kia PSF-4 Power Steering Fluid — 1 qt

Preparation

1. Position vehicle on level ground with adequate overhead clearance for engine hoist operation (minimum 8 feet recommended)
2. Disconnect negative battery cable and isolate from battery terminal
3. Remove engine cover and under-shield panels from beneath vehicle
4. Drain engine oil completely and remove oil filter
5. Drain engine coolant from radiator petcock and engine block drain plugs into appropriate containers
6. Relieve fuel system pressure by removing fuel pump fuse and running engine until it stalls
7. Remove hood assembly after marking hinge positions for reinstallation alignment
8. Install fender covers to protect painted surfaces during engine extraction

Procedure

1. 1

   Disconnect air intake and throttle body systems
   Remove air filter housing assembly. Disconnect MAF sensor connector. Remove air intake tube from throttle body to air box. Disconnect throttle body electrical connector and remove throttle cable bracket if equipped. Label and disconnect all vacuum hoses connected to intake manifold and throttle body.
2. 2

   Remove cooling system components
   Disconnect radiator upper and lower hoses at engine connections. Disconnect heater hoses at firewall connections. Remove radiator cooling fan assembly. Disconnect coolant reservoir hose. Remove radiator assembly if needed for clearance. Cap all open coolant passages to prevent contamination.
3. 3

   Disconnect fuel system and evaporative emissions
   Disconnect fuel supply line at fuel rail using appropriate disconnect tool. Have shop towels ready for residual fuel spillage. Disconnect fuel return line if equipped. Disconnect EVAP canister purge valve and all associated vacuum lines. Cap all open fuel lines immediately to prevent contamination and fuel odor.
   ⚠️Fuel system must be depressurized before disconnecting lines. Have fire extinguisher accessible.
4. 4

   Remove accessory drive components
   Remove serpentine belt by releasing tensioner. Remove power steering pump with lines attached and secure to frame with wire (do not allow to hang by hoses). Remove AC compressor with lines attached and secure to frame. Remove alternator after disconnecting electrical connections. Label all electrical connections during removal.
   Torque spec

   AC Compressor Bolts25 Nm (18 lb-ft)

   Power Steering Pump Bolts25 Nm (18 lb-ft)

   Alternator Mounting Bolts50 Nm (37 lb-ft)
5. 5

   Disconnect exhaust system
   Support exhaust system with jack stand. Remove exhaust manifold to catalytic converter/downpipe nuts working from hottest point (center) to coldest (outer edges). Lower front exhaust section and support safely. Inspect exhaust manifold studs for damage and replace if necessary.
   ⚠Exhaust fasteners may be seized. Apply penetrating oil 24 hours before removal if possible. Use 6-point sockets to minimize rounding.
   Torque spec

   Exhaust Manifold Nuts30 Nm (22 lb-ft)
6. 6

   Disconnect engine electrical systems
   Disconnect engine wiring harness main connector(s) at firewall or fender locations. Disconnect starter motor electrical connections and remove starter. Disconnect all remaining sensors including oxygen sensors, knock sensor, oil pressure sender, coolant temperature sensors, camshaft and crankshaft position sensors. Take photos during disconnection for reinstallation reference.
   Torque spec

   Mounting Bolts26 Nm (19 lb-ft)

   Sensor Bolts10 Nm (8 lb-ft)
7. 7

   Separate transmission from engine
   Support transmission with transmission jack or equivalent support. Remove transmission-to-engine bolts (typically 4-6 bolts around bell housing perimeter). Verify all electrical connections and mechanical linkages between transmission and engine are disconnected. Note position of any ground straps. Carefully separate transmission from engine ensuring input shaft clears clutch assembly or torque converter, moving transmission straight back to avoid damage.
   ⚠️Transmission must be properly supported before removing mounting bolts. Unsupported transmission can fall causing severe injury.
   Torque spec

   Transmission-to-Engine Bolts55 Nm (41 lb-ft)
8. 8

   Remove engine mount attachments
   Install engine support bar across fender rails and attach to engine lifting points, or position engine hoist and attach lifting chains to engine lift brackets. Apply slight upward tension to support engine weight. Remove right side engine mount (timing belt side) frame bolts first, then engine-to-mount bolts. Remove left side engine mount bolts. Remove rear engine mount/torque strut. Verify all mounts are disconnected before proceeding.
   ⚠Engine must be fully supported by hoist before removing final mount bolts. Verify lifting chains are properly secured and balanced.
   Torque spec

   Engine Mount-to-Block Bolts65 Nm (48 lb-ft)

   Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
9. 9

   Final inspection and engine extraction
   Perform final walk-around inspection to verify all hoses, wires, cables, and mounts are disconnected. Check underneath for any remaining connections. Slowly raise engine while guiding it forward and upward, adjusting hoist angle using leveler as needed to clear radiator support, front subframe, and firewall. Have assistant guide engine during extraction to prevent contact with body panels. Once clear of engine bay, lower onto engine stand or suitable work surface.
   ⚠️Lift slowly and observe engine path continuously. Stop immediately if any binding occurs and recheck for missed connections.
10. 10

    Install engine into vehicle
    Reverse extraction process by positioning engine on hoist with proper balance and angle. Guide engine into bay slowly, aligning with transmission input shaft/torque converter and engine mount locations. Align transmission to engine ensuring dowel pins engage properly. Install transmission-to-engine bolts hand-tight first, then torque in cross pattern. Install and torque all engine mount bolts starting with rear mount, then sides.
    Torque spec

    Transmission-to-Engine Bolts55 Nm (41 lb-ft)

    Engine Mount-to-Block Bolts65 Nm (48 lb-ft)

    Engine Mount-to-Frame Bolts75 Nm (55 lb-ft)
11. 11

    Reinstall accessory components
    Install starter motor and torque mounting bolts. Reconnect starter electrical connections. Install alternator and torque mounting bolts, connect electrical connections. Install AC compressor with new O-rings if system was opened, torque bolts. Install power steering pump and torque bolts. Install serpentine belt following proper routing diagram.
    Torque spec

    Mounting Bolts26 Nm (19 lb-ft)

    Alternator Mounting Bolts50 Nm (37 lb-ft)

    AC Compressor Bolts25 Nm (18 lb-ft)

    Power Steering Pump Bolts25 Nm (18 lb-ft)
12. 12

    Reconnect exhaust system
    Install new exhaust manifold gasket. Apply anti-seize to exhaust manifold studs. Align exhaust system to manifold and install nuts hand-tight. Torque exhaust manifold nuts starting from center and working outward in crossing pattern to prevent warping.
    Torque spec

    Exhaust Manifold Nuts30 Nm (22 lb-ft)
13. 13

    Reconnect all electrical and sensor connections
    Reconnect all engine sensors using photos and labels as reference: camshaft position sensor, crankshaft position sensor, knock sensor, oil pressure sender, coolant temperature sensors, oxygen sensors. Reconnect main engine wiring harness connector(s) at firewall. Verify all connectors are fully seated and locked. Reconnect any ground straps removed during disassembly.
    Torque spec

    Sensor Bolts10 Nm (8 lb-ft)
14. 14

    Reconnect fuel, cooling, and intake systems
    Reconnect fuel supply and return lines ensuring proper engagement of quick-disconnect fittings. Reconnect EVAP system hoses and purge valve. Install radiator if removed. Reconnect radiator hoses and heater hoses with new clamps. Install coolant reservoir hose. Reconnect all vacuum lines to intake manifold. Install throttle body connections and air intake system. Reconnect MAF sensor.
15. 15

    Fill fluids and perform final checks
    Install new oil drain plug crush washer and torque drain plug. Install new oil filter and fill engine with specified quantity and grade of engine oil. Fill cooling system with specified coolant through radiator and reservoir. Check power steering fluid level and top off. Check transmission fluid level per manufacturer procedure. Reinstall engine covers and under-shields. Reinstall hood using alignment marks. Reconnect battery negative cable.
    Torque spec

    Oil Drain Plug35 Nm (26 lb-ft)

Reassembly

1. Ensure all torque specifications are followed exactly, especially critical fasteners marked in torque spec list
2. Replace all single-use fasteners including exhaust nuts and any stretch bolts
3. Use new gaskets for all separated joints including exhaust manifold and intake manifold connections
4. Verify serpentine belt routing matches diagram before completing installation
5. Double-check that all electrical connectors are fully seated with locking tabs engaged

Verification

• Perform visual inspection of entire engine bay to verify no tools or parts remain and all connections are made
• Check all fluid levels and verify no leaks present at drain plug, oil filter, or hose connections
• With ignition on but engine off, verify all warning lights operate normally and check engine light illuminates then extinguishes
• Start engine and verify it runs smoothly without unusual noises, vibrations, or smoke
• Monitor coolant temperature and verify cooling fans operate at proper temperature threshold
• Check for fluid leaks while engine is running, inspecting oil pan, valve cover, coolant hoses, power steering, and transmission connections
• Verify AC compressor engages properly when AC is activated
• Test drive vehicle and verify normal operation including smooth acceleration, proper transmission engagement, and no warning lights
• Recheck all fluid levels after test drive and top off as necessary
• Perform final torque verification on all critical fasteners after engine reaches operating temperature

More procedures for this vehicle