Why is the Tiguan's engine noise loud at idle?
2 Answers
The reasons for the loud engine noise of the Tiguan at idle are: 1. Inability to adapt to the viscosity of new engine oil. After prolonged use, the engine oil becomes thinner and carbon deposits accumulate. When new oil is replaced, the engine may not adapt to its viscosity; 2. Poor sound insulation, requiring inspection of the vehicle's sealing strips; 3. Insufficient coolant in low temperatures can cause the engine noise to increase. The Tiguan is a compact SUV launched by SAIC Volkswagen, with dimensions of 4506mm in length, 1809mm in width, and 1685mm in height, and a wheelbase of 2684mm. It is equipped with a 1.8T turbocharged engine with a maximum power of 118kw, paired with a 6-speed automatic transmission.
The increased engine noise during idling in the Tiguan could be due to various reasons. Let me share some common possibilities. Excessive engine carbon buildup is a major issue, especially after prolonged low-speed driving, as carbon deposits accumulate in the cylinders or throttle body, leading to incomplete combustion, increased vibration, and noise. Belt aging or loosening is another frequent culprit, often causing squeaking sounds during operation—you should check the tension of the timing belt or alternator belt. Oil-related issues shouldn’t be overlooked, such as dirty, overly thin, or insufficient oil, as poor lubrication can cause the engine to grind noisily. Additionally, damaged spark plugs or ignition system malfunctions can make the engine run unevenly. I recommend trying a fresh oil change first. If the problem persists, visit a repair shop for a thorough inspection to prevent minor issues from escalating and affecting driving comfort.
