Engine Compression
- Check compression pressure with engine at normal operating temperature. Remove injection tube on nozzle side, spill tube assembly and nozzle assemblies with washers.
- On Sentra models, disconnect fuel cut solenoid wire. On both models, place a compression gauge adapter in cylinder. Hand tighten bleeder screw on gauge. Crank engine at least 6 revolutions and check compression.
- Install nozzle assemblies with washers, spill tube assembly, and injection tube. Bleed fuel system. See Fuel System Bleeding.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Pressure | ||
| Sentra | 427-469 psi (30-33 kg/cm2 ) | |
| Pickup | 356-427 psi (25-30 kg/cm2 ) | |
| Max. Variation Between Cylinders | ||
| Sentra | 71 psi (5 kg/cm2 ) | |
| Pickup | 43 psi (3 kg/cm2 ) | |