About the 22R Engine
The 22R engine is a popular four-cylinder engine produced by Toyota. It was first introduced in 1981 and has since become known for its reliability and durability. The 22R engine is commonly found in Toyota trucks and SUVs, such as the Toyota Hilux and 4Runner. With its simple design and robust construction, the 22R engine has earned a reputation for being a workhorse, capable of delivering consistent performance in a variety of conditions.
Head Bolt Torque Specifications
When working on the cylinder head of the 22R engine, it is crucial to follow the correct torque specifications for the head bolts. Proper torque ensures that the head bolts are tightened to the correct level, providing the necessary clamping force to secure the cylinder head to the engine block. Here are the recommended torque specifications for the 22R head bolts:
| Head Bolt | Torque Specification (ft. lbs.) | Torque Specification (Nm) |
|---|---|---|
| 1 | 29-32 | 39-43 |
| 2 | 43-47 | 58-64 |
| 3 | 43-47 | 58-64 |
| 4 | 43-47 | 58-64 |
| 5 | 43-47 | 58-64 |
| 6 | 43-47 | 58-64 |
| 7 | 43-47 | 58-64 |
| 8 | 43-47 | 58-64 |
| 9 | 43-47 | 58-64 |
| 10 | 43-47 | 58-64 |
| 11 | 43-47 | 58-64 |
| 12 | 43-47 | 58-64 |
| 13 | 43-47 | 58-64 |
| 14 | 43-47 | 58-64 |
| 15 | 43-47 | 58-64 |
| 16 | 43-47 | 58-64 |
Steps to Torque the Head Bolts
Follow these steps to properly torque the head bolts on a 22R engine:
- Clean the threads of the head bolts and the bolt holes in the engine block using a suitable cleaning agent.
- Apply a small amount of engine oil to the threads of each head bolt.
- Start by tightening each head bolt to 14 ft. lbs. (19 Nm) in a crisscross pattern.
- Next, tighten each head bolt to 29 ft. lbs. (39 Nm) in the same crisscross pattern.
- Finally, torque each head bolt to the specified torque value according to the sequence provided in the table above.
- Double-check the torque on each head bolt to ensure they are all properly tightened.
Following these torque specifications and steps will help ensure the cylinder head is securely fastened to the engine block, promoting proper sealing and preventing any potential issues related to head bolt tightness.