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.
1998 Mitsubishi Eclipse GS-T, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Compression
Check engine compression with engine at normal operating temperature, all spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS
| Application (1) | Specification | ||||||
|---|---|---|---|---|---|---|---|
| Compression Ratio | |||||||
| 1.5L (VIN A) | 9.0:1 | ||||||
| 1.8L (VIN C) | 9.5:1 | ||||||
| 2.0L | |||||||
| (VIN F) | 8.5:1 | ||||||
| (VIN Y) | 9.6:1 | ||||||
| 2.4L (VIN G) | 9.5:1 | ||||||
| 3.0L | |||||||
| (VIN H) | 8.9:1 | ||||||
| (VIN J) | 10.0:1 | ||||||
| (VIN K) | 8.0:1 | ||||||
| (VIN P) | 9.0:1 | ||||||
| 3.5L (VIN M & P) | 9.0:1 | ||||||
| Compression Pressure | |||||||
| 1.5L (VIN A) | 192 psi (13.4 kg/cm2 ) | ||||||
| 1.8L (VIN C) | 199 psi (13.9 kg/cm2 ) | ||||||
| 2.0L (VIN F) | 178 psi (12.5 kg/cm2 ) | ||||||
| 2.0L (VIN Y) | 170-225 psi (11.7-15.5 kg/cm2 ) | ||||||
| 2.4L (VIN G) | 192 psi (13.4 kg/cm2 ) | ||||||
| 3.0L | |||||||
| (VIN H & P) | 171 psi (12.0 kg/cm2 ) | ||||||
| (VIN J) | 185 psi (13.0 kg/cm2 ) | ||||||
| (VIN K) | 156 psi (10.9 kg/cm2 ) | ||||||
| 3.5L (VIN M & P) | 171 psi (12.0 kg/cm2 ) | ||||||
| Maximum Variation Between Cylinders (2) | 14 psi (1.0 kg/cm2 ) | ||||||
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Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.