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.
Check Compression Pressure
2017 Hyundai Santa Fe SE, FWDSECTION Check Compression Pressure
- Warm up the engine to normal operating temperature.
- Disconnect the spark plug cables and remove the spark plugs.
- Crank the engine to remove any foreign material in the cylinders.
- Put compression pressure gauge into spark plug hole.
- Crank the engine with throttle valve wide open and check compression pressure at each cylinder.
Specification: 1, 029kPa (10.5kgf/cm2 , 149psi) (250~400 rpm)
- Is compression pressure for each cylinder displayed within specifications?
YES
- Go to "Check Timing" as below.
NO
- Add a small amount of oil through the spark plug hole, and repeat above steps. If the addition of oil causes the compression to rise, the cause is a worn or damaged piston ring or cylinder inner surface.
- If the compression remains the same, the cause is a burnt or defective valve seat, or pressure is leaking from the head gasket. Repair as necessary. 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.