KIA Niro: Crankshaft Repair procedures
- Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
- Be sure to shut off the high voltage circuit according to the "High Voltage Shut-off Procedures" before doing any work related with the high voltage system to avoid serious electrical injuries.
- Turn the crankshaft pulley so that the No.1 piston is at TDC (Top dead center).
- Use fender covers to avoid damaging painted surfaces.
- To avoid damaging the cylinder head, wait until the engine coolant temperature drops below normal temperature before removing it.
- When handling a metal gasket, be careful not to fold the gasket or damage the contacting surface of the gasket.
- To avoid damage, unplug the wiring connectors carefully while holding the connector portion.
Mark all wiring and hoses to avoid misconnection.
- Shut off the high voltage circuit.
(Refer to Engine Mechanical System - "High Voltage Shut off Procedure")
- Remove the engine assembly from the vehicle.
(Refer to Engine and Transaxle Assembly - "Engine and Transaxle Assembly")
- Remove the dual clutch transmission (Refer to Double Clutch Transmission (DCT) - "Double Clutch Transmission Assembly")
- Install the engine to engine stand for disassembly.
- Remove the intake manifold.
(Refer to Intake and Exhaust System - "Intake Manifold")
- Remove the exhaust manifold.
(Refer to Intake and Exhaust System - "Exhaust Manifold")
- Remove the hybrid starter generator (HSG).
(Refer to Hybrid Motor System - "Hybrid Starter Generator (HSG)")
- Remove the timing chain.
(Refer to Timing System - "Timing Chain")
- Remove the Cylinder head assembly.
(Refer to Cylinder Head Assembly - "Cylinder Head")
- Remove the fly wheel.
(Refer to Cylinder Block - "Fly Wheel")
- Remove the thermostat.
(Refer to Cooling System - "Thermostat")
- Remove the water pump assembly.
(Refer to Cooling System - "Water Pump")
- Remove the A/C compressor.
(Refer to Heating, Ventilation Air conditioning -"Compressor")
- Remove the oil filter.
(Refer to Lubrication System - "Engine Oil")
- Remove the oil screen.
(Refer to Lubrication System - "Oil Pan")
- Remove the piston and connecting rod assemblies.
(Refer to Cylinder Block - "Piston and Connecting Rod")
- Check the crankshaft main bearing oil clearance.
- Check the crankshaft end play.
- Lift the crankshaft (A) out of the engine, being careful not to damage journals.
Arrange the main bearings and thrust bearings in the correct order.
- Inspect the pilot bearing.
(1) Check if the pilot bearing (A) is damaged visually.
(2) Check if there is noise by rotating the inner shell (A) of pilot bearing.
(3) If a damage or noise is found, then replace the crankshaft with the pilot bearing.
Be sure to replace the crankshaft and pilot bearing together, because crankshaft can be damaged or deformed when removing the pilot bearing.
- KIA Niro EV / Hybrid (SG2) - (2021-2023) - Owner's manual
- Kia Niro - First generation - (2017-2022) - Service and Repair Manual