Replacing the Main Bearing Bolts of the engine is a key step to ensure the long-term stable operation of the engine. The following are the precautions when replacing:

First of all, prepare special tools such as torque wrench, box wrench, etc., to ensure that the bolt tightening torque is accurate. At the same time, cleaning cloths, brushes and solvents are also necessary for cleaning bolts and threaded holes.

Before removing the old bolt, clean the threaded holes and check for damage. When disassembling, it should be gradually loosened to avoid excessive one-time force damage to the thread. Old bolts should be stored properly for comparison with new bolts.

The specifications of the new bolt must be consistent with the original requirements, and check whether the surface is smooth and burr free. Apply an appropriate amount of lubricant, such as motor oil, to reduce friction.

When installing, align the threaded hole and screw in slowly to avoid cross threads. Tighten step by step using a wrench, following the torque value provided by the manufacturer to ensure consistent tightening torque for each bolt.

After tightening, check the tightness of each bolt again to ensure that it is not loose. Clear the work area to make sure there are no tools or debris left behind.

Finally, the replacement time, bolt specifications and torque values are recorded in detail for future reference and maintenance. At the same time, do not mix different specifications of bolts, strictly follow the manufacturer's maintenance manual.

Through the above steps, you can ensure the correct replacement of the Main Bearing Bolts and improve the reliability and performance of the engine.