What are the causes of abnormal noises in the Volkswagen Bora engine?
1 Answers
Volkswagen Bora engine abnormal noises are caused by excessive clearance and abnormal sounds due to excessive carbon deposits. Excessive clearance: The crankshaft bearings, connecting rod bearings, and piston pin holes are severely worn, resulting in excessive clearance. At the moment of piston stroke change, the piston top impacts the cylinder head under the force of inertia. Abnormal noises caused by excessive carbon deposits: Abnormal noises in the piston ring area mainly include metal knocking sounds from the piston rings, air leakage sounds from the piston rings, and abnormal sounds caused by excessive carbon deposits. Weakened piston ring elasticity, excessive opening clearance, overlapping openings, or grooves on the cylinder wall can all cause piston ring air leakage.