What Causes the Roewe 350 Intake Pipe to Make a Dull Noise?

[DeNorah]

Some parts may be excessively worn or improperly assembled and adjusted. Here is additional information: 1. Solution: Engine noise indicates that the technical state of a certain engine component has changed. This is mainly caused by excessive wear or improper assembly and adjustment of some parts. Some noises may even predict potential catastrophic damage to the engine. Therefore, when engine noise occurs, it should be repaired promptly to prevent further damage. 2. Wear-induced noise: Door noise is primarily caused by insufficient lubrication, but it is important to determine whether it originates from the door hinge position or internal components such as the window regulator, door lock mechanism, or handle mechanism. For door hinges or limiters, a specialized door hinge and track lubricant should be used. For internal components like window regulators, door lock mechanisms, and handle mechanisms, a specialized door accessory lubricant is recommended. When selecting a brand, it is advisable to choose those commonly used by 4S shops. Avoid using engine oil or ordinary grease, as they may freeze in winter and emit harmful odors that can affect health.

[AdrielFitz]

I've encountered a similar issue with my Roewe 350 where the intake pipe made a muffled sound accompanied by a whining noise, which worried me a bit. Possible causes include a loose intake pipe connection causing air leakage (like air rushing through gaps creating noise), or a clogged air filter restricting airflow and starving the engine of sufficient air, leading to reduced power. It could also be cracks in the corrugated pipe amplifying vibrations on bumpy roads.

For solutions: First check if the clamps are tightened properly by gently shaking the pipe to feel for looseness. Regular air filter cleaning is crucial - the Roewe 350's filter location tends to accumulate dust. In my case, replacing the filter solved the problem, saving over 200 RMB in repair fees. Delaying repairs can increase fuel consumption and even damage the throttle body. Early detection and repair is wise - don't let minor issues become major problems.

[VanFaith]

When I repair my car, I encounter a muffled sound from the intake pipe. After analysis, it is mostly caused by air leakage in the pipe, such as aging and loosening of the clamp or damage to the joint sealing ring. The material of the Roewe 350 intake pipe is prone to deformation under high temperatures, forming gaps that create a whistling sound from high-speed airflow, followed by a decrease in power. Another common cause is foreign objects clogging the filter screen, increasing the engine's suction force and resulting in a dull sound. The detection method is simple: apply some soapy water to see if bubbles appear at the joints. Replacing the clamp or filter is not difficult; just prepare new parts and you can handle it yourself. This can prevent subsequent issues, such as improper air-fuel mixture leading to excessive emissions. I make it a habit to check the condition of the intake pipe every 5,000 kilometers. With good maintenance, the car can last several more years.

[StWalter]

After years of driving, a noisy and stuffy feeling in the intake pipe is usually due to poor airflow. A leaking intake pipe reduces air flow, causing weak engine output and a puffing sound; if the air filter is clogged, airflow becomes even more restricted, resulting in a muffled sound at idle. Additionally, deformed connectors are common in older Roewe 350 models, causing noticeable noise when vibrations increase. Simple troubleshooting suggestion: After starting the engine, listen for sounds near the intake pipe—a clear hissing noise indicates a leak. Replacing old parts usually costs around 50 yuan, and preventive maintenance can save major trouble. Don’t ignore such abnormal noises—they hint at potential faults, and delaying repairs can lead to more severe power loss.