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 MANUALSMITSUBISHI1989SIGMA AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESPECIFICATIONSCOMPRESSION SPECS
1989 Mitsubishi Sigma Automatic
Compression Specs
1989 Mitsubishi Sigma AutomaticSECTION Compression Specs
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| 1.5L (VIN J) | 9.4:1 | |
| 1.5L (VIN X) | 9.4:1 | |
| 1.6L (VIN Y) | 9.2:1 | |
| 1.6L Turbo (VIN Z) | 8.0:1 | |
| 1.8L (VIN T) | 9.0:1 | |
| 2.0L (VIN V) | 8.5:1 | |
| 2.0L DOHC (VIN R) | 9.0:1 | |
| 2.4L (VIN W) | 8.5:1 | |
| 2.6L (VIN E) | 8.7:1 | |
| 2.6L Turbo (VIN N) | 7.0:1 | |
| 3.0L (VIN S) | 8.9:1 | |
| Compression Pressure | ||
| 1.5L (VIN J) | 164 psi (11.3 kg/cm2 ) | |
| 1.5L (VIN X) | 137 psi (9.6 kg/cm2 ) | |
| 1.6L (VIN Y) | 171 psi (12.0 kg/cm2 ) | |
| 1.6L (VIN Z) Turbo | 149 psi (10.5 kg/cm2 ) | |
| 1.8L (VIN T) | 131 psi (9.2 kg/cm2 ) | |
| 2.0L (VIN R) DOHC (Galant) | 137 psi (9.6 kg/cm2 ) | |
| 2.0L (VIN V) SOHC, 2.4L, 2.6L & 3.0L | 119 psi (8.4 kg/cm2 ) | |
| 2.6L (VIN N) Turbo | 142 psi (10.0 kg/cm2 ) | |
| Maximum Variation Between Cylinders | 14 psi (1.0 kg/cm2 ) | |
RENDER: 1.0x
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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.