Serpentine Belt

Serpentine belt functions:

The serpentine belt, driven by the engine, is essential for a naturally aspirated engine to run smoothly. As it turns, it powered your alternator, air conditioning compressor and power steering pump. On some vehicles, it also runs the water pump, radiator fan and power brakes.

NAPA Belts/Hose provides the largest offering of belts and belt drive system components for automotive, heavy-duty, industrial, agricultural, recreation and small-engine applications. From an alternator decoupler pulley to a timing belt, NAPA carries a full range of belts, pulleys, belt tensioners and related parts that power everything from lawnmowers to rock crushers and mining equipment. If it moves, you can get a belt for it from NAPA Belts/Hose.

What are the signs indicating a faulty serpentine belt?

Without a working serpentine belt, the engine can overheat or lose electrical power.

If your serpentine belt breaks, your battery would die in a few kilometres. If it runs your fan or your water pump, your engine can overheat, and steering and braking can be more difficult.

You may have been told to look for cracks in your belt to see if it needs to be replaced. Of course, cracks are still a concern, but modern belt material does not crack as often as old belts did. In fact, worn belts often have no visible sign of damage at all. What we look for these days is the thickness of the belt. Your technician has a special little tool that measure the depth of the grooves in the belt to see if it needs replacing. A worn belt can slip or can be misaligned, putting under stress on the accessories that it runs.

Also, it is important for the belt to be tight. There is a tensioner pulley on your engine that put pressure on the belt to keep the right tension. A worn belt tensioner causes belt to be loose and slip.

Your owner’s manual recommend regular serpentine belt inspections. Just ask your service advisor at NAPA Autopro.

How often do you need to maintain a serpentine belt?

Although it is extremely resistant, the serpentine belt must be inspected regularly by a certified NAPA AUTOPRO technician in order to detect any failures or loss of tension, and should be replaced according to the manufacturer’s maintenance schedule.

If the serpentine belt breaks, the vehicle will break down and need to be towed. That’s why it’s vital that your serpentine belt be inspected by a certified NAPA AUTOPRO technician, who can replace it according to the manufacturer’s maintenance schedule if necessary.

Learn more about the serpentine belt from our NAPA AUTOPRO experts in the video below: