What are the causes of abnormal noise from the Nissan Teana's pulley?
2 Answers
There are many reasons for abnormal noise from the Nissan Teana's pulley. Abnormal pulley clearance: If there is noise from the pulley, check whether the pulley has excessive clearance. If a large clearance is found, the pulley idler should be replaced. Abnormal belt operation: Check the state of the belt during operation. The belt has a specific operating range during operation. If it exceeds this range and the belt is stretched too long, the belt needs to be replaced. Additionally, prolonged operation of the belt can cause thermal expansion. In this case, letting the machinery rest for a while will help. Belt wear: If the belt is within the normal range, observe whether the working surface of the belt is worn. This could be due to slippage caused by excessive belt wear. Impact of special weather conditions: If the machine frequently makes abnormal noises during operation in humid weather and the surfaces of the belt and pulley are smooth, you can sprinkle some water on the pulley of the machine. If the machine produces abnormal noise, the belt should be replaced.
As an experienced auto mechanic, I've encountered numerous Nissan Altima belt noise issues. The most common causes are aged/cracked or loose drive belts that produce squealing or slapping sounds during rotation. When the tensioner malfunctions, the belt's lateral movement exacerbates noise. Worn pulley bearings are another frequent culprit - damaged ball bearings create clicking or humming noises. During inspection, don't rush to replace parts. First, stop the engine to locate the sound source, check belt tension by pressing lightly, and sprinkle water on the belt. If the noise stops, it indicates dry friction; persistent noise suggests tensioner or bearing failure. Nissan vehicles experience accelerated belt system wear over time. Neglect may damage engine components, so I recommend routine belt system checks during maintenance. Address abnormalities immediately at professional shops to avoid costly repairs later.
