BMW 740i Grille
How to Identify the Causes behind BMW 740i Grille Problems
Your BMW 740i grille is supposed to protect your engine from incurring damage and not the one that causes it. But when it gets broken, it can bring you troubles. Without a well-functioning grille, harmful contaminants can enter and clog your engine. If you are currently experiencing grille problems, you must act quickly. You must be ready to do some troubleshooting to find out the causes behind these grille issues.
Rust on chromed grilles
Don't be fooled by chromed grilles. They may look shiny from the outside, but severely corroded on the inside. When rust begins to spread, it can weaken your grille and make it brittle. When you notice that the silvery paint of your grille is already chipping, you have to either replace or paint it. If you just leave it and do nothing to restore it, rust particles and debris can get into your engine and cause blockage and contamination.
Cracks and scratches on plastic grilles
Majority of grilles are made of ABS plastic. This type of material is hard and strong, but it is still prone to cracks and scrapes. To check your grille for physical damage, inspect it closely. However, small cracks won't appear if your grille is dirty. Tiny dents and fractures may be covered by dust or mud making them hard for you to notice. To make them become visible, wash your grille first with dishwashing detergent. You can use an old toothbrush to scrub the entire surface of the grille. Once all the stains are removed, you can clearly see the damaged parts that you need to repair.
Clunking noise coming from your grille is usually caused by missing bolts and screws. When the grille is not securely attached to the bumper, it will wobble and vibrate when the car is moving. When you keep on hearing this sound, you should check if the mounting bolts of the grille are complete. Replace any missing ones, but it is better if you can change them all at once. Also, make it a habit to retighten the screws every month to make sure that they don't get loose.