What Causes the Squeaking Noise When a Truck Belt Slipping?
2 Answers
This is caused by the contact surface between the belt and the pulley becoming too smooth. Here are the relevant explanations: 1. Air conditioning pulley and belt slipping: During the slipping process, a sharp friction sound is produced. Check if there is oil or dirt on the belt. If the belt is slipping due to oil or dirt, clean it thoroughly. If not, adjust the position bolts of the compressor to tighten the belt, which can increase friction. 2. Damaged belt tensioner: This can also cause abnormal noise, and a new tensioner needs to be replaced. Abnormal noise caused by the slipping of the compressor clutch or the compressor bearing requires disassembly to inspect the cause. Foreign objects entering the blower or ventilation ducts can also produce abnormal noise, necessitating cleaning of the blower and ventilation ducts.
Last time, the belt on my truck was squeaking and slipping, which gave me a headache for a while. The problem was either a loose or worn-out belt. The belt drives the air conditioning and water pump, and when it's loose, it slips on the pulleys, making noise like an old shoe slipping. Another common cause is oil or water contamination on the pulleys, reducing friction. I ignored it a few times, and the belt eventually snapped, causing the engine to overheat and nearly stall, costing me thousands more in repairs. It's recommended to check the belt tension every quarter, using a tension gauge or pressing with your fingers to feel if the elasticity is right. Before long trips, take a quick look, and adjust or replace it if there's an issue—saves hassle and ensures safety.
