Hyundai i-30: Engine Mechanical System / Repair procedures
Compression Pressure Inspection |
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If there is lack of power, excessive oil consumption or poor
fuel economy, measure te compression pressure.
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1. |
Warm up and stop engine.
Allow the engine to warm up to normal operating temperature.
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2. |
Remove the engine cover.
(Refer to Engine and Transaxle Assembly - "Engine Cover")
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3. |
Remove the ignition coils.
(Refer to Engine Electrical System - "Ignition Coil")
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4. |
Remove the spark plugs.
(Refer to Engine Electrical System - "Spark Plug")
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5. |
Check the cylinder compression pressure.
(1) |
Insert a compression gauge into the spark plug hole.
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(3) |
While cranking the engine, measure the compression pressure.
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Always use a fully charged battery to obtain
engine speed of 200 rpm or more.
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(4) |
Repeat step (1) through (3) for each cylinder.
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This measurement must be done in as short a
time as possible.
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Compression pressure :
1,128 kPa (11.5 kg/cm², 164.0 psi)
Minimum pressure :
981 kPa (10.0 kg/cm², 142.0 psi)
Difference between each cylinder :
98kPa (1.0kg/cm2, 14psi) or less
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(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 step (1) through (3) for cylinders with
low compression.
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If adding oil helps the compression, it is likely that
the piston rings and/or cylinder bore are worn or damaged.
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If pressure stays low, a valve may be sticking or seating
is improper, or there may be leakage past the gasket.
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6. |
Reinstall the spark plugs.
Tightening torque :
14.7 - 24.5 N.m (1.5 - 2.5 kgf.m, 10.8 - 18.1 lb-ft)
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7. |
Connect the injector connectors.
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8. |
Install the ignition coil.
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
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9. |
Connect the ignition coil connectors.
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10. |
Some DTC's may exist after the inspection test and may need to be manually
cleard with diagnostic tool.
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Specifications
Description
Specification
Limit
General
Type
In-line, DOHC
Number of cylinders
4
Bore
71...
Troubleshooting
Symptom
Suspect area
Remedy
Engine misfire with abnormal internal lower engine noises...
Other information:
Components and components location
Components
1. Passenger
Air Bag (PAB)
Description and operation
Description
The passenger airbag (PAB) is installed inside the crash pad and protects the
front passenger in the event of a frontal crash...
Special Service Tools
Tool (Number and Name)
Illustration
Use
Deployment tool
0957A-34100A
Airbag deployment tool.
Use with (0957A-AL140 and 0957A-AL160)
Dummy
0957A-38200
Simulator to check the resistanceof each wiring harness...
Categories
Opening the bonnet
1. Park the vehicle and set the parking
brake.
2. Pull the release lever to unlatch
the bonnet. The bonnet should
pop open slightly.
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