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.
Engine Compression
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed, and throttle wide open.
| Application | Specification | ||||||
|---|---|---|---|---|---|---|---|
| Compression Pressure (1) | |||||||
| Optima & Magentis (Canadian) | |||||||
| 2.4L | 178 psi (1227 kPa) @ 250-400 RPM | ||||||
| 2.7L | (2)170 psi (1200 kPa) | ||||||
| Rio | 184 psi (1275 kPa) @ 300 RPM | ||||||
| Sedona | (2)170 psi (1200 KPa) | ||||||
| Sorento | (2)170 psi (1200 kPa) | ||||||
| Spectra | 193 psi (1331 kPa) @ 300 RPM | ||||||
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Use the Manual With the Right Hardware
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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.
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