Hyundai Accent (HC): Engine Mechanical System

Hyundai Accent (HC) (2017 - 2022) Service Manual / Engine Mechanical System

Contents:

Specifications ➤

Repair procedures

- Compession Pressure Inspection

   

• If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.

1.Start the engine and turn the coolant temperature to 80 - 95 °C and stop.

2.Remove the engine cover.(Refer to Engine and Transaxle Assembly - "Engine Cover")

3.Disconnect the injector connectors (A).

4.Remove the ignition coils.(Refer to Engine Electical System - "Ignition Coil")

5.Remove spark plugs.(Refer to Engine Electrical System - "Spark Plug")

6.Check the cylinder compression pressure.

(1)Insert a compression gauge into the spark plug hole.

(2)Fully open the throttle valve.

(3)While cranking the engine, measure the compression pressure.

   

• Always use a fully charged battery to obtain engine speed of 200 rpm or more.

(4)Repeat steps (1) through (3) for each cylinder.

   

• If you need to check the compression pressure for more than three times, restart the engine to restore the lubrication condition to be normal and then check the compression pressure again.

Compression pressureStandard : 1225.83kPa (12.5kg/cm, 177.79psi) (200-250 rpm)Minimum : 1078.73kPa (11.0kg/cm, 156.46psi)Difference between each cylinder : 98 kPa (1.0 kg/cm, 14 psi) or less

(5)If the cylinder compression in 1 or more cylinders is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps (1) through (3) for cylinders with low compression.

• If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.

• If pressure stays low, a valve may be sticking or seating is improper, or there may be leakage past the gasket.

7.Install the spark plugs.(Refer to Engine Electrical System - "Spark Plug")

8.Install the ignition coil.(Refer to Engine Electical System - "Ignition Coil")

9.Connect the injector connectors (A).

10.Some DTCs may exist after the inspection test and may need to be manually cleared with GDS.

11.Install the engine cover.(Refer to Engine and Transaxle Assembly - "Engine Cover")

Troubleshooting ➤

Special Service Tools

- Special Service Tools

Tool (Number and name)IllustrationUse
Valve spring compressor
(09222-3K000)
Valve spring compressor adapter
(09222-3K100)

Removal and installation of the intake / exhaust valve spring and retainer lock
Valve stem seal installer
(09222-2B100)

Installation of the valve stem seal
Oil pan remover
(09215-3C000)

Removal of oil pan
Crankshaft front oil seal installer
(0K231-2C200)

Installation of the crankshaft front oil seal
Crankshaft rear oil seal installer
(09231-2B200)
Handle
(09231-H1100)

Installation of the crankshaft rear oil seal
Ring gear stopper
(09231-3N100)

Removal and installation of crankshaft damper pulley bolt

Engine And Transaxle Assembly ➤

Timing System ➤

Cylinder Head Assembly ➤

Cylinder Block ➤

Cooling System ➤

Lubrication System ➤

Intake And Exhaust System ➤

General Service Information

Specifications

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: TPMS Sensor

- Description 1.General descriptionWU is a sensor placed in the tire that reports pressure and temperature.The WU is mounted inside the wheels, fixed to the valve. The angle between the valve and the housing of the WU is variable.This allows adaptation to various types of rims.The Wheel Unit is made of a PCB supporting the electronic hardware and encapsulated inside a housing which is potted with polyurethane.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Variable Intake Solenoid (VIS) Valve

- Description Variable Intake manifold Solenoid (VIS) valve is installed on the intake manifold. The VIS valve controls the vacuum modulator which activates a valve in the intake manifold. The ECM opens or closes this valve according to engine condition (Refer to below table). Engine conditionVIS valveOperation Medium speedClosedIncreasing engine performance in low engine speed by reducing intake interference among cylinders Low / High speedOpenMinimizing intake resistance by shortening intake manifold length and increasing area of air entrance - Specification ItemSpecification Coil resistance (Ω)30.

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