What is the reason for the abnormal noise from the hood when passing over bumps?
2 Answers
The reason for the abnormal noise from the hood when passing over bumps is that only one of the two locks on the hood lock block is engaged. The solution is to open the hood and close it again. The functions of the hood are: 1. Airflow guidance; 2. Protection of the engine and surrounding pipeline components; 3. Assisting driving vision by effectively adjusting the direction of reflected light; 4. Preventing accidents; 5. Isolating the heat generated during engine operation. The solutions for a stuck hood that won't open are: 1. Lubricating the hood lock tooth spring; 2. Using a tool to hook open the hood or inserting a wire from under the vehicle's engine into the hood lock hole to pull it open.
After driving for so many years, I've encountered this issue several times. The hood creaking on bumpy roads is most commonly caused by a loose hood latch or aged rubber bump stops; my car had the same problem last time, making drum-like noises when going over speed bumps. Checking it yourself is simple: after parking and turning off the engine, shake the hood by hand to see if it wobbles; if it's loose, it might be an unlatched lock or deformed rubber pad. If not fixed promptly, the noise will become more annoying, and the hood may suddenly pop up during bumps, blocking your view and affecting safe driving. Additionally, similar noises sometimes come from loose pipes in the intake system, so it's important to thoroughly inspect all fastening points near the engine bay. Applying grease to the hinges during regular maintenance can prevent many troubles.
