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 MANUALSPLYMOUTH1990VOYAGER SE, 2.5 J, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSMECHANICAL CHECKSENGINE COMPRESSION
1990 Plymouth Voyager SE, 2.5 J, Automatic
Engine Compression
1990 Plymouth Voyager SE, 2.5 J, AutomaticSECTION Engine Compression
COMPRESSION SPECIFICATIONS
| Application | Specification | |||||
|---|---|---|---|---|---|---|
| Compression Ratio | ||||||
| 2.5L Non-Turbo | 8.9:1 | |||||
| 2.5L Turbo | 7.8:1 | |||||
| 3.0L | 8.85:1 | |||||
| 3.3L | 8.9:1 | |||||
| 3.9L | 9.0:1 | |||||
| 5.2L | 9.0:1 | |||||
| 5.9L | 8.1:1 | |||||
| Compression Pressure | ||||||
| 3.0L | (1) 178 psi (12.5 kg/cm2 ) | |||||
| All Other Engines | (2) 100 psi (7.0 kg/cm2 ) | |||||
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RENDER: 1.0x
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.