Yanmar 4TNV88 Torque Specs
Introduction
The Yanmar 4TNV88 is a powerful and reliable engine commonly used in various industrial applications. Understanding the torque specifications of this engine is essential for maintaining its optimal performance and ensuring its longevity. In this article, we will provide detailed torque specifications for different components of the Yanmar 4TNV88 engine.
Engine Specifications
The following table presents the torque specifications for the major engine components of the Yanmar 4TNV88:
| Component | Torque Specification (Nm) | Torque Specification (lb-ft) |
|---|---|---|
| Cylinder Head Bolts | 120 Nm | 88.5 lb-ft |
| Main Bearing Bolts | 110 Nm | 81.1 lb-ft |
| Connecting Rod Bolts | 50 Nm | 36.9 lb-ft |
| Crankshaft Pulley Bolt | 200 Nm | 147.5 lb-ft |
Fuel System Specifications
The following table provides the torque specifications for the fuel system components of the Yanmar 4TNV88:
| Component | Torque Specification (Nm) | Torque Specification (lb-ft) |
|---|---|---|
| Fuel Injection Pump Bolts | 25 Nm | 18.4 lb-ft |
| Fuel Injector Nozzle | 30 Nm | 22.1 lb-ft |
| Fuel Filter | 25 Nm | 18.4 lb-ft |
Cooling System Specifications
The following table outlines the torque specifications for the cooling system components of the Yanmar 4TNV88:
| Component | Torque Specification (Nm) | Torque Specification (lb-ft) |
|---|---|---|
| Water Pump Bolts | 25 Nm | 18.4 lb-ft |
| Thermostat Housing Bolts | 20 Nm | 14.8 lb-ft |
| Radiator Cap | 25 Nm | 18.4 lb-ft |
Exhaust System Specifications
The following table presents the torque specifications for the exhaust system components of the Yanmar 4TNV88:
| Component | Torque Specification (Nm) | Torque Specification (lb-ft) |
|---|---|---|
| Exhaust Manifold Bolts | 35 Nm | 25.8 lb-ft |
| Exhaust Pipe Bolts | 25 Nm | 18.4 lb-ft |
Conclusion
Having knowledge of the torque specifications for the various components of the Yanmar 4TNV88 engine is crucial for proper maintenance and repair. By following these specifications, you can ensure the correct tightening of bolts and fasteners, preventing potential issues and maximizing the engine’s performance. Remember to always refer to the manufacturer’s guidelines and consult a professional if you are unsure about any torque specifications.
appears the conn rod bolts for the Yanmar 4TNV88 spec sheet is wrong… we followed it and twisted off one . Did some more checking around and it should be 65ish ftlbs
sorry it was head bolts ,not conn rod