About the 855 Cummins Engine
The 855 Cummins engine is a popular choice in the heavy-duty trucking industry due to its reliability and performance. Manufactured by Cummins Inc., this engine is known for its durability and ability to handle demanding applications. The 855 Cummins engine is a 14.0-liter, six-cylinder diesel engine that has been widely used in various commercial vehicles, including trucks, buses, and construction equipment. Its robust design and powerful performance make it a preferred choice for many professionals in the transportation and construction sectors.
Head Bolt Torque Sequence for the 855 Cummins Engine
When it comes to maintaining and servicing the 855 Cummins engine, one critical aspect is ensuring the proper torque sequence for the head bolts. The head bolts play a crucial role in securing the cylinder head to the engine block, ensuring a tight seal and proper combustion. Following the correct torque sequence is essential to prevent leaks, maintain engine performance, and avoid potential damage. Here is the recommended torque sequence for the head bolts of the 855 Cummins engine:
| Bolt Number | Torque Specification (ft. lbs.) | Torque Specification (Nm) |
|---|---|---|
| 1 | 100 | 136 |
| 2 | 100 | 136 |
| 3 | 100 | 136 |
| 4 | 100 | 136 |
| 5 | 100 | 136 |
| 6 | 100 | 136 |
| 7 | 100 | 136 |
| 8 | 100 | 136 |
| 9 | 100 | 136 |
| 10 | 100 | 136 |
| 11 | 100 | 136 |
| 12 | 100 | 136 |
Torque Sequence Steps:
To properly torque the head bolts of the 855 Cummins engine, follow these steps:
1. Begin by tightening all the bolts to 50 ft. lbs. (68 Nm) in a crisscross pattern.
2. Next, tighten all the bolts to 100 ft. lbs. (136 Nm) in the same crisscross pattern.
3. Repeat the torque sequence and tighten all the bolts to the final torque specification of 100 ft. lbs. (136 Nm).
Importance of Proper Torque Sequence
Following the correct torque sequence is crucial to ensure uniform and even clamping force across the cylinder head. This helps maintain a proper seal between the head gasket and the engine block, preventing coolant and oil leaks. Additionally, the correct torque sequence helps distribute the load evenly on the head bolts, reducing the risk of bolt failure or damage. Proper torque sequence is essential for the longevity and performance of the 855 Cummins engine.
In conclusion, the 855 Cummins engine is a reliable and powerful choice for heavy-duty applications. When it comes to maintaining and servicing this engine, it is crucial to follow the recommended head bolt torque sequence to ensure a proper seal and prevent potential issues. By adhering to the specified torque values and sequence, you can help ensure the longevity and performance of your 855 Cummins engine.