About the Engine
The 318 head bolt torque sequence is an important aspect of engine maintenance for the Chrysler 318 engine. The 318 engine, also known as the Mopar 318, is a V8 engine that was produced by Chrysler Corporation from 1967 to 2003. It was widely used in various Chrysler, Dodge, and Plymouth vehicles during its production years. The 318 engine is known for its durability and reliability, making it a popular choice among car enthusiasts and collectors.
Head Bolt Torque Sequence
When it comes to the head bolt torque sequence for the 318 engine, following the correct pattern is crucial to ensure proper tightening and prevent any issues with the engine’s performance. The head bolts secure the cylinder head to the engine block, creating a tight seal and allowing the engine to function efficiently. Here is the recommended torque sequence for the 318 head bolts:
| Bolt Number | Torque Specification (ft. lbs.) | Torque Specification (Nm) |
|---|---|---|
| 1 | 30 | 41 |
| 2 | 60 | 81 |
| 3 | 90 | 122 |
| 4 | 90 | 122 |
| 5 | 60 | 81 |
| 6 | 30 | 41 |
Tightening Procedure
To properly torque the head bolts on a 318 engine, follow these steps:
1. Begin by tightening all the bolts to 30 ft. lbs. (41 Nm) in the numerical order specified in the torque sequence table.
2. Next, increase the torque to 60 ft. lbs. (81 Nm) for bolts 2 and 5.
3. Then, tighten bolts 3 and 4 to 90 ft. lbs. (122 Nm).
4. Finally, complete the tightening process by torquing bolts 1 and 6 to 30 ft. lbs. (41 Nm).
It is important to note that the torque sequence and specifications may vary depending on the specific year and model of the 318 engine. Therefore, it is always recommended to consult the vehicle’s service manual or a trusted source for the accurate torque specifications for your particular engine.
Importance of Proper Torque Sequence
Following the correct head bolt torque sequence is crucial for several reasons. First, it ensures an even distribution of clamping force across the cylinder head, creating a proper seal between the head and the engine block. This prevents any leaks and maintains the integrity of the combustion chamber.
Additionally, using the correct torque sequence helps prevent warping or distortion of the cylinder head. Uneven tightening can cause uneven pressure on the head, leading to potential damage and decreased engine performance.
By adhering to the recommended torque sequence and specifications, you can help maintain the longevity and reliability of your 318 engine.
In conclusion, the 318 head bolt torque sequence is an essential aspect of maintaining the Chrysler 318 engine. By following the correct tightening procedure and using the recommended torque specifications, you can ensure a proper seal, prevent leaks, and maintain the performance of your engine. Always consult the appropriate resources for accurate torque specifications based on your specific engine model and year.