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.
Mechanical Inspection: Compression
Check engine mechanical condition with a compression gauge, vacuum gauge or an engine analyzer. See engine analyzer manual for specific instructions.
| Application | psi (kg/cm2 ) | ||
|---|---|---|---|
| Standard Pressure | |||
| NX & Sentra | |||
| 1.6L | 192 (13.5) | ||
| 2.0L | 178 (12.5) | ||
| Pickup | 192 (13.5) | ||
| Stanza | 175 (12.3) | ||
| 240SX | 179 (12.6) | ||
| Minimum Pressure | |||
| NX & Sentra | |||
| 1.6L | 164 (11.5) | ||
| 2.0L | 149 (10.5) | ||
| Pickup | 142 (10.0) | ||
| Stanza | 146 (10.3) | ||
| 240SX | 151 (10.6) | ||
| Maximum Variation Between Cylinders | 14 (1.0) | ||
| Application | psi (kg/cm2 ) | ||||
|---|---|---|---|---|---|
| Standard Pressure | |||||
| Maxima | |||||
| VG30E | 173 (12.2) | ||||
| VE30DE | 183 (12.9) | ||||
| Pathfinder & Pickup | 173 (12.2) | ||||
| 300ZX | |||||
| Non-Turbo | 186 (13.1) | ||||
| Turbo | 171 (12.0) | ||||
| Minimum Pressure (1) | |||||
| Maxima | |||||
| VG30E | 128 (9.0) | ||||
| VE30DE | 142 (10.0) | ||||
| Pathfinder & Pickup | 128 (9.0) | ||||
| 300ZX | |||||
| Non-Turbo | 142 (10.0) | ||||
| Turbo | 128 (9.0) | ||||
| Maximum Variation Between Cylinders | 14 (1.0) | ||||
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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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