Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHYUNDAI2013GENESIS COUPE 2.0T PREMIUMREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM (DTC TROUBLESHOOTING) (2 OF 3) - 2.0LDTC P0300: RANDOM/MULTIPLE CYLINDER MISFIRE DETECTEDENGINE COMPRESSION TEST
2013 Hyundai Genesis Coupe 2.0T Premium
Engine Compression Test
2013 Hyundai Genesis Coupe 2.0T PremiumSECTION Engine Compression Test
- Warm up the engine to normal operating temperature. Verify the battery must be at or near full charge.
- With ignition "OFF", disconnect the ignition coil connectors and the spark plug cables
- Install compression pressure gauge to the spark plug hole.
- With wide open throttle by hand, cranking the engine and record the compression readings from all of the cylinders
Specification:
Compression pressure: 1, 283kPa (13.0kgf/cm2 , 185psi)
Minimum pressure: 1, 135kPa (11.5kgf/cm2 , 164psi)
Difference between each cylinder: 100kPa (1.0kgf/cm2 , 15psi) or less
- Is compression pressure within the specified value?
YES
- Verify if the engine has excessive coolant consumption. If yes, check for damaged inlet water passage, engine block, cylinder head or head gasket. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
NO
- 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 compression test for cylinders with low compression pressure.
- 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. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.