What are the reasons for the loud engine noise in the Tiguan?
4 Answers
The reasons for the loud engine noise in the Tiguan are: 1. Poor spark plug performance; 2. Vacuum tube leakage; 3. High-voltage wire leakage; 4. PCV valve blockage; 5. Throttle position sensor malfunction; 6. Idle stepper motor failure; 7. Idle control valve malfunction; 8. Abnormal throttle opening; 9. Intake system leakage. Taking the 2017 Volkswagen Tiguan as an example, it belongs to the compact SUV category, with body dimensions of: length 4506mm, width 1809mm, height 1685mm, wheelbase of 2684mm, fuel tank capacity of 63L, and curb weight of 1545kg.
I think there could be several common reasons for the loud engine noise in the Tiguan. First is the oil issue – if the oil is old or insufficient, lubrication decreases, increasing friction between mechanical parts, which naturally makes the engine louder. When I drove a similar car before, the engine noise became louder because I forgot to change the oil. Second is wear and tear of engine components, such as old piston rings or bearings, which operate unstably and produce extra noise. Third is an exhaust system leak – loose or cracked tailpipe connections can create noise when exhaust gases escape. Sometimes, it could also be a loose fan belt, making a rattling sound at high speeds. These issues are more noticeable during cold morning starts because metal contracts, increasing gaps. If the noise persists, I recommend getting a comprehensive check at a professional shop to prevent minor issues from turning into major repairs, which could affect safety and fuel consumption.
When I notice excessive engine noise in my Tiguan, the first thing that comes to mind is the condition of the fluids. If the engine oil hasn't been changed for too long and becomes viscous, insufficient lubrication leads to increased friction among internal engine components, resulting in harsh sounds. Another possibility is aging engine parts, such as worn valves or crankshafts, which create abnormal noises due to poor operational balance. Additionally, a loose exhaust manifold can cause exhaust leaks, producing a roaring sound. The air conditioning compressor or high-speed fan operation can also contribute to the noise. As a car owner, I regularly check the oil dipstick and exhaust system to reduce the likelihood of malfunctions. Excessive noise not only affects driving comfort but may also indicate underlying issues. It's better to diagnose and address them early to avoid breakdowns that could disrupt my trip.
My Tiguan's engine is making loud noises, which usually indicates issues with the engine itself. For example, when engine oil deteriorates and becomes too viscous, it causes rough operation and increased noise; or when piston rings wear out and leak, creating additional sounds; exhaust pipe leaks at connections can cause roaring noises; and a slipping pulley can produce a rattling sound. These problems are common in older vehicles. After experiencing similar issues, I promptly took it to the shop for repairs, and replacing the faulty parts made it much quieter. Ignoring these problems can lead to increased fuel consumption, reduced performance, and even higher repair costs if the situation worsens. It's best not to delay and risk damaging the entire engine.
