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 MANUALSHYUNDAI2003SONATA LX, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESPECIFICATIONSENGINE CONTROLS - SERVICE & ADJUSTMENT SPECIFICATIONSMECHANICAL CHECKSENGINE COMPRESSION
2003 Hyundai Sonata LX, Standard
Engine Compression
2003 Hyundai Sonata LX, StandardSECTION Engine Compression
Check engine compression with engine at normal operating temperature, at specified cranking speed, all spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS
| Application | (1) Specification | ||||||
|---|---|---|---|---|---|---|---|
| Compression Pressure | |||||||
| Accent | |||||||
| Standard Value | 218 psi (15.3 kg/cm2 ) | ||||||
| Limit Value | 203 psi (14.3 kg/cm2 ) | ||||||
| Elantra | |||||||
| Standard Value | 218 psi (15.3 kg/cm2 ) | ||||||
| Limit Value | 203 psi (14.3 kg/cm2 ) | ||||||
| Santa Fe (2) | |||||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||||
| Sonata | |||||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||||
| Tiburon (2.0L) | |||||||
| Standard Value | 218 psi (15.3 kg/cm2 ) | ||||||
| Limit Value | 203 psi (14.3 kg/cm2 ) | ||||||
| Tiburon (2.7L) | |||||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||||
| XG350 | |||||||
| Standard Value | 170 psi (12.0 kg/cm2 ) | ||||||
| Limit Value | 150 psi (11.0 kg/cm2 ) | ||||||
| Maximum Variation Between Cylinders | |||||||
| All Models | 14 psi (1.0 kg/cm2 ) | ||||||
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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.