About the 5.9 Cummins Engine
The 5.9 Cummins engine is a popular choice among truck owners due to its durability and power. Manufactured by Cummins Inc., this inline six-cylinder diesel engine has been widely used in various heavy-duty applications, including pickup trucks, commercial vehicles, and industrial equipment. Known for its reliability and impressive torque, the 5.9 Cummins engine has become a favorite among those seeking a dependable and robust powertrain.
Head Bolt Torque Sequence for the 5.9 Cummins
When it comes to assembling or reassembling the cylinder head of a 5.9 Cummins engine, it is crucial to follow the correct torque sequence. Proper torqueing ensures that the head bolts are tightened uniformly, preventing any potential leaks or damage. Here is the recommended head bolt torque sequence for the 5.9 Cummins engine:
| Bolt Number | Torque Specification (ft. lbs.) | Torque Specification (Nm) |
|---|---|---|
| 1 | 100 | 136 |
| 2 | 50 | 68 |
| 3 | 100 | 136 |
| 4 | 50 | 68 |
| 5 | 100 | 136 |
| 6 | 50 | 68 |
| 7 | 100 | 136 |
| 8 | 50 | 68 |
| 9 | 100 | 136 |
| 10 | 50 | 68 |
Step-by-Step Guide for Torquing the Head Bolts
To properly torque the head bolts of a 5.9 Cummins engine, follow these steps:
1. Start by ensuring that the cylinder head and block mating surfaces are clean and free from any debris or oil.
2. Begin with bolt number 1 and torque it to 100 ft. lbs. (136 Nm) using a torque wrench.
3. Move to bolt number 2 and torque it to 50 ft. lbs. (68 Nm).
4. Continue this alternating pattern, torquing bolts 3, 4, 5, 6, 7, 8, 9, and 10 to 100 ft. lbs. (136 Nm) and bolts 2, 4, 6, 8, and 10 to 50 ft. lbs. (68 Nm).
5. Once all the bolts have been torqued, go back and repeat the sequence, increasing the torque to 100 ft. lbs. (136 Nm) for all bolts.
6. Finally, perform an additional 90-degree clockwise rotation on all bolts to ensure proper tightening.
Following this torque sequence and the specified torque values will help ensure a secure and leak-free cylinder head installation on your 5.9 Cummins engine.
Conclusion
The 5.9 Cummins engine is a reliable and powerful choice for various heavy-duty applications. When it comes to torquing the head bolts during assembly or reassembly, following the correct sequence and torque specifications is crucial for a successful installation. By adhering to the recommended torque values and steps outlined in this article, you can ensure the proper tightening of the head bolts, contributing to the overall performance and longevity of your 5.9 Cummins engine.