What Causes Loud Valve Noise in the New Santana?
1 Answers
New Santana's loud valve noise is caused by engine oil and hydraulic lifters. The specific reasons are: Insufficient engine oil quantity reduces the oil pump's output or prevents pumping due to air intake, leading to decreased oil pressure. This results in increased wear between the crankshaft and bearings, as well as between the cylinder liners and pistons due to poor lubrication, thus causing loud noise. Damaged hydraulic lifters: Valves rely on hydraulic lifters for automatic clearance adjustment. If damaged, the clearance between the main crankshaft and connecting rod bearings gradually increases, leakage rises, oil pressure drops, leading to louder valve noise. Methods to prevent increased valve noise include: Ensure normal oil level; add the same model of engine oil from the same manufacturer when insufficient. Replace worn oil pump components, grind the inner plane of the pump cover to restore the gap with the gear end face to standard range, ensuring normal operation of the oil pump. Ensure proper use of hydraulic lifters. After long-term engine use, the clearance between the main crankshaft and connecting rod bearings gradually increases, leakage rises, and oil pressure drops. It is necessary to grind the crankshaft, select new connecting rod bearings and main bearings to restore proper clearance.
