About the 6.7 Cummins Engine
The 6.7 Cummins engine is a popular choice among truck enthusiasts and heavy-duty vehicle owners. Manufactured by Cummins Inc., this engine is known for its durability, power, and efficiency. It is commonly found in Dodge Ram trucks and other commercial vehicles. The 6.7 Cummins engine boasts impressive torque and horsepower, making it suitable for various applications, including towing, hauling, and off-roading. To ensure optimal performance and reliability, it is crucial to follow proper maintenance procedures, including the correct torque sequence for the head bolts.
Head Bolt Torque Sequence for the 6.7 Cummins Engine
When it comes to tightening the head bolts on a 6.7 Cummins engine, following the correct torque sequence is essential. This ensures that the cylinder head is properly secured and prevents any potential leaks or damage. The torque sequence involves tightening the bolts in a specific order, gradually increasing the torque until reaching the recommended specifications.
Torque Specifications
To achieve the proper torque, it is crucial to refer to the manufacturer’s specifications. The table below provides the head bolt torque specifications for the 6.7 Cummins engine in both foot-pounds (ft. lbs.) and Newton-meters (Nm).
| Bolt Number | Torque (ft. lbs.) | Torque (Nm) |
|---|---|---|
| 1 | 30 | 41 |
| 2 | 90 | 122 |
| 3 | 90 | 122 |
| 4 | 90 | 122 |
| 5 | 90 | 122 |
| 6 | 90 | 122 |
| 7 | 90 | 122 |
| 8 | 90 | 122 |
| 9 | 90 | 122 |
| 10 | 90 | 122 |
| 11 | 90 | 122 |
| 12 | 90 | 122 |
Torque Sequence Steps
To properly torque the head bolts on a 6.7 Cummins engine, follow these steps:
1. Start with bolt number 1 and torque it to 30 ft. lbs. (41 Nm).
2. Move to bolt number 2 and torque it to 90 ft. lbs. (122 Nm).
3. Continue this pattern for bolts number 3 to 12, torquing each to 90 ft. lbs. (122 Nm) in the specified sequence.
4. Once all bolts have been torqued to the initial specifications, repeat the sequence and torque them again to 90 ft. lbs. (122 Nm).
5. Finally, perform a third pass in the same sequence, increasing the torque to 90 ft. lbs. (122 Nm) once more.
Following this torque sequence and specification ensures that the head bolts are properly tightened and helps maintain the integrity of the engine.
Conclusion
Properly torquing the head bolts on a 6.7 Cummins engine is crucial for maintaining its performance and preventing any potential issues. By following the specified torque sequence and using the recommended torque specifications, you can ensure that the cylinder head is securely fastened. Remember to always consult the manufacturer’s guidelines and torque specifications for your specific engine model. With the right torque and sequence, you can enjoy the power and reliability that the 6.7 Cummins engine has to offer.