Hyundai Palisade (LX2): Engine Mechanical System / Repair procedures

Hyundai Palisade (LX2) 2020-2026 Service Manual / Engine Mechanical System / Repair procedures

Compression Pressure Inspection
Hyundai Palisade. Repair procedures   
•
If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.
1.
Warm up engine until the normal operating temperature (80 - 95°C (176-203°F)).
2.
Remove the air duct.
(Refer to Intake and Exhaust System - "Air Cleaner")
3.
Remove the battery.
(Refer to Engine Electrical System - "Battery")
4.
Remove the air cleaner assembly.
(Refer to Intake and Exhaust System - "Air Cleaner")
5.
Remove the surge tank.
(Refer to Intake And Exhaust System - "Surge Tank")
6.
Remove the ignition coils.
(Refer to Engine Electrical System - "Ignition Coil")
7.
Remove the spark plugs.
(Refer to Engine Electrical System - "Spark Plug")
8.
Check cylinder compression pressure.
(1)
Insert a compression gauge into the spark plug hole.
(2)
Fully open the throttle.
(3)
Crank the engine over 7 times to measure compression pressure.
Hyundai Palisade. Repair procedures   
•
Always use a fully charged battery to obtain engine speed of 250 rpm or more.
(4)
Repeat step 1) though 3) for each cylinder.
Hyundai Palisade. Repair procedures   
•
This measurement must be done in as short a time as possible.
Compression pressure :
1,373 kPa (14.0 kgf/cm², 199 psi) (250 - 400 rpm)
Minimum pressure :
1226 kPa (12.5 kgf/cm², 178 psi)
Difference between each cylinder :
98kPa (1.0kg/cm², 14psi) 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 step 1) through 3) for cylinders with low compression.
a.
If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.
b.
If pressure stays low, a valve may be sticking or seating is improper, or there may be leakage past the gasket.
9.
Reinstall the spark plugs.
10.
Install the ignition coils and ignition connectors.
11.
Install the surge tank.
(Refer to Intake And Exhaust System - "Surge Tank")

    Specifications Description Specifications Limit General Type V - type, DOHC Number of cylinders 6 Bore 96 mm (3.

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