>

Hyundai Equus: Repair procedures - General Information - Engine Mechanical System - Hyundai Equus VI 2009-2025 Service ManualHyundai Equus: Repair procedures

Compression Pressure Inspection
   
If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.
1.
Warm up engine to normal operating temperature(80~95°C(176-203°F)).
2.
Disconnect the LH/RH ignition coil connectors (A) and then remove the ignition coils.

3.
Remove the spark plugs.
Using a 16mm plug wrench, remove the 8 spark plugs.
4.
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.
   
Always use a fully charged battery to obtain engine speed of 250 rpm or more.
(4)
Repeat step 1) though 3) for each cylinder.
   
This measurement must be done in as short a time as possible.

Compression pressure :
1,078kPa (11.0kg/cmx, 156psi)
Minimum pressure :
931kPa (9.5kg/cmx, 135psi)
Difference between each cylinder :
98kPa (1.0kg/cmx, 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.
5.
Reinstall the spark plugs.

Tightening torque :
14.7 ~ 24.5 N.m (1.5 ~ 2.5 kgf.m, 10.8 ~ 18.1 lb-ft)

6.
Install the ignition coils and ignition connectors.
    Specifications
    Specifications DescriptionSpecificationsLimitGeneralTypeV-type, DOHCNumber of cylinders8Bore96mm (3.7795in)Stroke87mm (3.4252in)Total displacement5.038 cc (307.3 cu.in)Compression ratio11.5 : 1Fi ...

    Troubleshooting
    Troubleshooting SymptomSuspect areaRemedyEngine misfire with abnormal internal lower engine noises.Worn crankshaft bearings.Loose or damaged engine drive plate.Replace the crankshaft and bearings ...

    See also:

    Rear Wheel House Trim Repair procedures
    Replacement     • Put on gloves to protect your hands.     • When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protec ...

    Troubleshooting
    Failure Diagnosis 1. In principle, ESP and TCS controls are prohibited in case of ABS failure. 2. When ESP or TCS fails, only the failed system control is prohibited. 3. However, when the ...

    Smart Key Diagnostic Repair procedures
    Inspection Self Diagnosis With GDS Smart key system defects can be quickly diagnosed with the GDS. GDS operates actuator quickly to monitor, input/output value and self diagnosis. The followi ...

    Categories

    Hyundai Equus Manuals


    © 2011-2025 Copyright www.heqmanual.com