Mechanical Inspection: Compression
Check engine mechanical condition with a compression gauge, vacuum gauge or an engine analyzer. See engine analyzer manual for specific instructions.
WARNING:
DO NOT use ignition switch during compression tests on fuel injected engines. Use a remote starter to crank engine. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create fire hazard and contaminate engine oiling system.
ENGINE COMPRESSION (4-CYLINDER)
| 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) | ||
ENGINE COMPRESSION (V6)
| 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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