About the 4G64 Engine
The 4G64 engine is a popular four-cylinder engine produced by Mitsubishi Motors. It belongs to the Sirius family of engines and has been used in various Mitsubishi models, as well as in other vehicles from different manufacturers. Known for its reliability and performance, the 4G64 engine has become a favorite among car enthusiasts and mechanics alike. One crucial aspect of maintaining this engine is ensuring that the head bolts are torqued to the correct specifications. In this article, we will provide you with the recommended head bolt torque specs for the 4G64 engine.
Head Bolt Torque Specifications for the 4G64 Engine
To ensure proper sealing and prevent any potential leaks, it is essential to torque the head bolts of the 4G64 engine to the manufacturer’s specifications. Here are the recommended torque values for the head bolts:
| Head Bolt | Torque Specification (ft. lbs.) | Torque Specification (Nm) |
|---|---|---|
| 1 | 22-25 | 30-34 |
| 2 | 22-25 | 30-34 |
| 3 | 22-25 | 30-34 |
| 4 | 22-25 | 30-34 |
| 5 | 22-25 | 30-34 |
| 6 | 22-25 | 30-34 |
| 7 | 22-25 | 30-34 |
| 8 | 22-25 | 30-34 |
Steps to Torque the Head Bolts
To properly torque the head bolts of the 4G64 engine, follow these steps:
1. Begin by cleaning the threads of the head bolts and the bolt holes in the engine block to ensure accurate torque readings.
2. Apply a small amount of engine oil or assembly lubricant to the threads of each head bolt.
3. Start by tightening each head bolt to 14-18 ft. lbs. (19-24 Nm) in a crisscross pattern.
4. Repeat the tightening process, increasing the torque to 22-25 ft. lbs. (30-34 Nm) in the same crisscross pattern.
5. Finally, make a final pass, tightening each head bolt an additional 90 degrees using a torque angle gauge or a torque wrench with an angle attachment.
By following these torque specifications and steps, you can ensure that the head bolts of your 4G64 engine are properly secured, providing a reliable seal and preventing any potential issues.
Conclusion
Properly torquing the head bolts of the 4G64 engine is crucial for maintaining its performance and preventing any leaks. By referring to the recommended torque specifications and following the correct tightening sequence, you can ensure that the head bolts are secured to the appropriate specifications. Regular maintenance and attention to detail will help keep your 4G64 engine running smoothly for years to come.