The timing belt is a critical part of your vehicle’s engine. It connects the crankshaft to the camshaft, which opens and closes the valves. This simple rubber belt controls the timing of all of these components to ensure optimal engine performance. They usually last between 60,000 and 100,000 miles. However, since a broken timing belt can cause severe engine damage, it’s beneficial to recognize the symptoms of one that’s about to fail.

4 Signs of a Failing Timing Belt

1. Misfiring Engine

The timing belt uses rubber teeth to hold and turn the camshaft. When these wear out, its grip on the camshaft may slip, causing the cylinders to open or close at the wrong time, which leads to engine misfires.

2. Leaking Oil

The timing belt has a cover secured by nuts and bolts, sealing it from the engine block with a gasket. If the cover gets loose, or if the gasket wears out or gets damaged in any way, oil from the timing belt will leak. This could lead to overheating or the timing belt’s premature wear.

3. Black Smoke

If the cylinders don’t open and close at the correct time, it will lead to combustion issues, which will manifest in black smoke coming from your exhaust. When you see this, it means the timing belt is probably too worn to turn the camshafts properly.

4. Engine Doesn’t Turn Over

This symptom can be caused by several issues, including a bad starter or battery with no charge. The key is to listen. If you just hear clicks, it’s most likely a starter or battery problem. But if you hear the starter engage, you might have a broken timing belt.

If you need help replacing a bad timing belt, get in touch with Dee’s Auto Care Specialists. This auto repair shop has served car owners in La Crosse and Onalaska, WI, as well as Winona, MN, since 1936. Their ASE-certified mechanics specialize in oil change, brakes, alignment, and preventative maintenance, among others. Call them at (608) 782-2530 or visit the website for more information.