About the 5.9 Cummins 24 Valve Engine
The 5.9 Cummins 24 Valve engine is a popular diesel engine known for its power and reliability. Produced by Cummins, a leading manufacturer of diesel engines, this engine is commonly found in heavy-duty trucks and other commercial vehicles. With its robust design and impressive performance, the 5.9 Cummins engine has gained a loyal following among truck enthusiasts and professionals in various industries.
Head Bolt Torque Specifications
To ensure proper installation and secure sealing of the cylinder head, it is crucial to torque the head bolts to the manufacturer’s specifications. The torque specifications for the 5.9 Cummins 24 Valve engine’s head bolts are as follows:
| Bolt Number | Torque Specification (ft. lbs.) | Torque Specification (Nm) |
|---|---|---|
| 1-10 | 100 | 136 |
| 11-20 | 50 | 68 |
| 21-26 | 100 | 136 |
Procedure for Torquing Head Bolts
Properly torquing the head bolts is essential to ensure a reliable seal and prevent any leaks or engine damage. Here is a step-by-step guide on how to torque the head bolts of a 5.9 Cummins 24 Valve engine:
1. Start by cleaning the threads of the head bolts and the bolt holes in the engine block. Remove any dirt, debris, or old sealant to ensure a clean and accurate torque reading.
2. Apply a thin layer of engine oil or assembly lubricant to the threads and the washer surface of each head bolt. This lubrication helps achieve accurate torque readings and ensures proper clamping force.
3. Begin torquing the head bolts in a specific sequence. For the 5.9 Cummins 24 Valve engine, the recommended sequence is as follows:
– Start with bolt number 1 and torque it to 100 ft. lbs. (136 Nm).
– Move to bolt number 2 and torque it to 100 ft. lbs. (136 Nm).
– Continue this pattern until bolt number 10, torquing each bolt to 100 ft. lbs. (136 Nm).
4. After completing the first round of torquing, repeat the sequence, but this time torque each bolt to 50 ft. lbs. (68 Nm). This step is crucial for achieving the proper clamping force.
5. Finally, go through the sequence one more time and torque each bolt to 100 ft. lbs. (136 Nm) for the final tightening.
6. Once all the head bolts are torqued to the specified values, it is recommended to perform an additional 90-degree clockwise rotation on each bolt. This extra rotation helps ensure even clamping force across all bolts.
7. Double-check the torque on all the head bolts to ensure they are within the specified range. If any bolts are not within the required torque range, repeat the torquing process for those specific bolts.
By following these torque specifications and the proper torquing procedure, you can ensure a secure and reliable seal for the cylinder head of your 5.9 Cummins 24 Valve engine. It is important to note that torque specifications may vary for different engine models or applications, so always refer to the manufacturer’s guidelines for your specific engine.