What size alternator belt do I need?

Measure the length of string it took to wrap around the path of the serpentine belt. Purchase a belt one size smaller than the size you measured. The actual belt will have tension on it, whereas the string doesn’t. For example, if you measured 80 inches, purchase a belt that is 79 1/2 inches.

How do you read an alternator belt number?

EXAMPLE: 6PK1003 » 6 – This indicates the number of ribs on the belt; therefore, this is a 6-rib belt. » PK – The “P” indicates a metric designation, and the “K” indicates the belt is automotive per SAE J1459. » 1003 – This is the effective length of the belt expressed in millimeters.

What does a worn alternator belt look like?

Symptoms of a broken serpentine belt include loud slapping, squealing or knocking noises coming from under the hood. The battery-shaped charging system warning light might also come on because the alternator will stop charging the battery. If a car has a hydraulic power steering pump, the steering will become stiff.

What happens if alternator belt is loose?

If your alternator belt gets too loose as you’re driving, it may cause your engine to stall. This means that you’re engine essentially shuts down and you’ll be forced to pull over onto the side of the road. Obviously, you wouldn’t want this happening on a busy street or rush hour traffic on the highway.

When should I replace alternator belt?

Usually, you can expect your alternator belt to last 3-4 years. You should have it inspected regularly – a good rule of thumb is to have your mechanic check the alternator belt whenever you have an oil change. Signs that your alternator belt needs to be replaced include: Fraying, cracking or looseness.

What do the numbers mean on V belts?

The number following it is the outside length of the belt in tenths of inches. The inside length of the belt is typically 2″ less for a 4L belt, and 1-1/2″ less for a 3L belt. “Classic” v-belt numbers start with a letter identifying the cross section, “A” through “E” – see V-Belt Dimensions below.

How do I read my Dayco belt number?

Pull the belt as tight as possible for a good reading. On the scale underneath the moveable pulley, the outer lines on the blue plastic will indicate the length of the belt in millimetres and inches. In this example the number 2045, which indicates a belt length of 2045 millimetres.

How do you know if you need a new alternator belt?

An unfamiliar noise or screech from the engine compartment is just one indication that your belt could be frayed, split, or worn out. Our technicians visually inspect your serpentine belt for fraying, splitting, glazing (the working edge of the belt becomes shiny from age and wear), or any other damage.