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
Ensure engine is at normal operating temperature, battery is fully charged and starter is operating properly. Remove all spark plugs and hold throttle valve wide open. Crank engine at least 6 engine revolutions per cylinder to determine engine compression. Engine cranking speed should be 250-400 RPM.
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| 1.5L | 9.5:1 | |
| 2.4L | 8.5:1 | |
| 3.0L | 8.9:1 | |
| Compression Pressure | ||
| 1.5L | 192 psi (13.5 kg/cm2 ) | |
| 2.4L | 119 psi (8.4 kg/cm2 ) | |
| 3.0L | 119 psi (8.4 kg/cm2 ) | |
| Maximum Variation Between Cylinders | 14 psi (1.0 kg/cm2 ) | |
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.