About the 4G69 Engine
The 4G69 engine is a four-cylinder gasoline engine produced by Mitsubishi Motors. It belongs to the Mitsubishi Sirius family of engines and was introduced in 2004. The 4G69 engine is commonly found in various Mitsubishi models, including the Outlander, Galant, Eclipse, and Lancer. Known for its reliability and performance, this engine has become a popular choice among car enthusiasts and everyday drivers alike.
Head Bolt Torque Specifications for the 4G69 Engine
To ensure proper installation and secure the cylinder head to the engine block, it is crucial to follow the recommended torque specifications for the head bolts. The table below provides the head bolt torque specifications for the 4G69 engine in both foot-pounds (ft. lbs.) and Newton-meters (Nm):
| 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 on the 4G69 engine, follow these steps:
1. Start by cleaning the threads of the head bolts and the corresponding holes in the engine block to ensure proper engagement.
2. Apply a small amount of engine oil to the threads of each head bolt. This will help reduce friction during the torquing process.
3. Begin by tightening each head bolt to the lower end of the torque specification range, around 22 ft. lbs. (30 Nm), in a crisscross pattern. This helps ensure even distribution of torque across the cylinder head.
4. Once all the head bolts have been initially tightened, go back and torque them to the upper end of the specification range, around 25 ft. lbs. (34 Nm), again using a crisscross pattern.
5. After torquing all the head bolts, perform a final pass using a torque angle gauge. Rotate each head bolt an additional 90 degrees in a crisscross pattern. This step helps achieve the required clamping force for a secure seal between the cylinder head and the engine block.
6. Double-check that all head bolts are properly torqued and tightened. This ensures the cylinder head is securely fastened and minimizes the risk of any leaks or engine damage.
Following these torque specifications and steps will help ensure the proper installation of the cylinder head on the 4G69 engine, promoting optimal performance and reliability. Always consult the specific service manual or manufacturer’s guidelines for your vehicle to ensure accurate torque specifications and procedures.