The solution to the engine noise issue in the B15 series

Causes of Engine Noise:

1. Excessive piston-to-cylinder clearance
   • Solution: Check piston-to-cylinder clearance and replace piston components or make adjustments as necessary.
2. Insufficient oil pressure or incorrect oil viscosity
   • Solution: Inspect the oil system to ensure proper oil pressure and use oil that meets specifications.
3. Rod deformation or overly tight rod bearings
   • Solution: Inspect and replace deformed rods or overly tight rod bearings to restore normal operation.
4. Unstable combustion leading to detonation
   • Solution: Adjust fuel mixture, ignition timing, and other parameters to stabilize combustion and prevent detonation.
5. Worn or damaged piston rings
   • Solution: Check the condition of piston rings and replace them if necessary.

Summary of Solutions:

• Conduct a comprehensive engine inspection, including pistons, rods, cylinder walls, and the oil system.
• Based on inspection findings, take appropriate repair or replacement measures to ensure proper engine operation.
• Regularly change high-quality oil and ensure the oil system functions correctly.
• Adjust engine operating parameters to optimize combustion efficiency and reduce the likelihood of noise.

Implementing these measures effectively resolves engine noise issues in the B15 series, ensuring normal engine operation and long-term reliability.