What are the causes and solutions for car belt slippage?
3 Answers
Car belt slippage is caused by belt aging, and replacing the belt can solve the problem. Below is relevant information about car belts: 1. Definition: It is an important component of the engine's valve timing system. By connecting to the crankshaft and maintaining a specific transmission ratio, it ensures the accuracy of intake and exhaust timing. 2. Purpose: The belt serves as a connecting link between the preceding and the following. The upper part connects to the timing wheel of the engine cylinder head, while the lower part connects to the timing wheel of the crankshaft; the timing wheel is connected to the camshaft, which has cams. The contact point is the small rocker arm, and the rocker arm generates pressure through the power transmitted by the timing belt, functioning to lift.
Last week, the belt on my car started slipping, producing a screeching noise that drove me crazy. After asking a few friends, I learned the main reason was severe belt aging—it hadn’t been replaced in five years, losing all elasticity and tension, which caused it to slip. Another possible cause was oil or dust contamination in the engine bay sticking to the belt and reducing friction. The solution was straightforward: I first parked and checked the belt’s condition myself. If it was loose, I tried adjusting the tensioner pulley to tighten it slightly. But feeling it wasn’t secure enough, I went to a repair shop and replaced the belt. The technician emphasized the importance of regular tension checks, recommending an inspection every two years or 50,000 kilometers. Otherwise, slipping could worsen, affecting functions like the AC or water pump and costing more in repairs. From this experience, I’ve developed a habit of glancing inside the engine monthly to prevent issues—now I drive with much more peace of mind.
After driving for so many years, I've encountered belt slippage multiple times, mainly caused by belt looseness or dirt accumulation. For example, belts harden with age, naturally losing tension; or oil leaks onto them, reducing friction. Slippage produces a squeaking sound—don't ignore it, as it may lead to bigger failures. When handling it, I always turn off the engine first and check the belt's condition: if it's just loose, I manually adjust the tensioner pulley slightly tighter with a wrench, but not excessively; if oil stains are visible, clean thoroughly before reinstalling, and replace if severely worn. For routine maintenance, I recommend owners have technicians test belt tension every few tens of thousands of kilometers to prevent hidden risks. Unresolved slippage may cause belt breakage, damaging engine components and costing unnecessary money. Developing a habit of regular checks saves both money and hassle.
