What are the consequences of a broken car engine belt?
4 Answers
When a car engine belt breaks, abnormal noises may occur during startup, the vehicle may experience power loss or slow acceleration, or ignition may become erratic, potentially leading to engine failure. Below is relevant information about engine belts: 1. Classification: Engine belts are divided into timing belts and water pump belts. Timing mechanisms use either belts or chains, with chains being maintenance-free and lasting the vehicle's entire lifespan. As rubber components, belts age over time and typically require replacement between 50,000 to 120,000 kilometers. 2. Causes of breakage: The belt tensioner pulley bearing may seize, causing belt strain; difficulty in crankshaft rotation can lead to timing misalignment, oil seal leakage may cause oil contamination of the belt, reducing its lifespan.
Last time I suffered a lot when the engine belt broke. I was driving when the battery warning light suddenly came on the dashboard, followed by the air conditioner failing. What was worse, the steering wheel became extremely heavy, requiring great effort to turn, and the brakes also became much harder. Fortunately, I pulled over in time to check and found a burnt smell coming from the engine compartment, with the belt broken into several pieces tangled around the pulley. Towing it to the repair shop cost me over 2000 yuan, replacing the belt and also repairing the scratched pulley groove. The scariest part is that when the belt snaps suddenly, it can cause parts to fly off and injure people or even lead to spontaneous combustion. Such sudden failures should never be taken lightly. I recommend checking the belt's aging condition every 60,000 kilometers or 3 years, and replacing it immediately if there are small cracks.
As a veteran driver who frequently takes long-distance trips, I've seen plenty of belt breakage incidents. The most immediate consequence is the vehicle becoming instantly immobilized: the alternator stops charging, leading to battery depletion; the power steering pump fails, making steering laborious; and the air conditioning compressor also shuts down. Worse still, some models have water pumps driven by the belt, which can cause the engine to overheat and emit white smoke within minutes. I've encountered this twice: once, it only cost a few hundred yuan to replace the belt; but another time, a colleague's timing belt snapped, bending the valves against the pistons, resulting in an engine overhaul that cost nearly twenty thousand yuan. Nowadays, I always replace the belt 10% earlier than the mileage specified in the maintenance manual, because a roadside breakdown is both dangerous and costly. Remember to check the tensioner pulley for looseness when inspecting the belt.
Last week my car broke down because the serpentine belt snapped. I could feel a sudden loss of power, and the battery warning light came on the dashboard. When I popped the hood, the belt had shredded into rubber strands tangled around the crankshaft pulley. The mechanic said I was lucky to stop in time - otherwise it could have seized the alternator bearings or destroyed the AC compressor. The new belt plus labor cost me 850 yuan, but I've heard repair bills can triple or quadruple if the broken belt jams the crankshaft pulley. Turbocharged cars need extra caution - water pump failure could lead to engine overheating and cylinder scoring. For cars over five years old, I recommend regularly checking belt flexibility and watching for hairline cracks.
