About the BMW N52 Engine
The BMW N52 engine is a six-cylinder inline engine that was produced by BMW from 2004 to 2015. It is part of BMW’s N-series engines, which are known for their performance and efficiency. The N52 engine is a naturally aspirated engine, meaning it does not have a turbocharger or supercharger. It is made of aluminum and features BMW’s Valvetronic variable valve lift system, which helps improve fuel efficiency and power delivery. One important aspect of maintaining the N52 engine is ensuring proper torque specifications for the cylinder head bolts. In this article, we will discuss the recommended torque values for the BMW N52 cylinder head bolts.
BMW N52 Cylinder Head Bolt Torque Specifications
To properly tighten the cylinder head bolts on the BMW N52 engine, it is crucial to follow the recommended torque specifications. The table below provides the torque values in both foot-pounds (ft. lbs.) and Newton-meters (Nm) for the different stages of tightening the cylinder head bolts.
| Stage | Torque (ft. lbs.) | Torque (Nm) |
|---|---|---|
| Stage 1 | 22 | 30 |
| Stage 2 | 90 degrees | 90 degrees |
| Stage 3 | 90 degrees | 90 degrees |
Stage 1:
The first stage of tightening the cylinder head bolts involves torquing them to 22 ft. lbs. (30 Nm). This initial torque helps ensure proper seating of the bolts and prepares them for the subsequent stages.
Stage 2 and 3:
After the initial torque, the cylinder head bolts need to be further tightened by rotating them an additional 90 degrees in two separate stages. This rotational tightening helps achieve the desired clamping force for the cylinder head. It is important to follow the specified torque angle and not exceed it.
Conclusion
Properly torquing the cylinder head bolts is essential for maintaining the integrity and performance of the BMW N52 engine. By following the recommended torque specifications, you can ensure that the cylinder head bolts are tightened to the correct specifications, preventing any potential issues that may arise from improper tightening. Always refer to the specific torque values provided by BMW for your particular model and year of the N52 engine.