2013 Ford Fusion Serpentine Belt Diagram (2024)

FAQs

How do you find a serpentine belt routing diagram? ›

Where can I find a belt routing diagram for my engine? A: Commonly a belt routing diagram sticker is on the underside of the hood or in the engine compartment. If there is no diagram, make a sketch of the belt and pulleys before removing the belt. This will help you re-route the new belt correctly.

The serpentine belt, driven by the crankshaft pulley, is connected to the engine. From there, it wraps around multiple other pulleys that power different components in the engine, such as the alternator, air conditioning compressor, power steering pump, and water pump.

Turn off the engine and remove the serpentine belt. Shake and spin each pulley to check if there is excessive play or noise. Any play or back-and-forth movement indicates a bad pulley bearing.

As an example, “8PK2515” is the PK number found on an OEM serpentine belt. The first digit indicates an eight-rib belt, followed by “P” to identify metric belt sizing, and a “K” showing that this belt conforms to the SAE standard for rib sizing (3.56 millimeters wide for automotive-type serpentine belts).

Are Serpentine Belts Directional? Because nearly all serpentine belts are symmetrical, a new belt's direction of rotation usually doesn't matter. What does matter, though, is that the new belt is routed correctly around the pulleys. It's also important that the grooved side of the belt faces toward the pulley grooves.

Tensioner Noise

If you hear noise or feel resistance to turning, this could be the indication of impeding bearing failure. If it spins freely by hand more than two rotations, the grease is gone from the pulley and needs to be replaced.

The exact amount of time you can drive a car without a serpentine belt varies depending on several factors, including the condition of your vehicle and the specific systems affected. However, it's crucial to reiterate that driving without a serpentine belt is not safe and should be avoided at all costs.

A timing belt has horizontal "teeth" that are made to fit both the crankshaft and camshaft. In contrast, a serpentine belt has multiple V-shaped grooves that appear vertically along the belt. Over time, these belts need to be replaced (roughly around the same time).

Replacing the serpentine belt is as simple as threading it into position, cranking the tensioner and slipping the belt over the tensioner pulley, or nearest pulley up top. Belt tensioners are mostly spring tension. Once installed, the spring retains pressure to the belt.

What noise does a bad serpentine belt make? ›

One of the earliest signs of a failing serpentine belt is a high-pitched squealing or whining noise, especially during engine startup or when turning the steering wheel. This noise is typically caused by the belt slipping on the pulleys due to reduced tension or deterioration.

As these belts wear out, they can begin to squeak or squeal. They make noise because there is not enough tension on the belt, or because the pulleys are misaligned or weak. Often, simply changing the belt will make it stop squealing. The noise isn't usually a danger, though it does sound alarming.

You spot visual signs of wear: Cracks, splits, and fraying are visual indicators of a worn belt. If the belt's sides are glazed over, the belt won't last much longer. Take the belt and twist it. If the layers separate or chunks are missing, a mechanic will need to replace your serpentine belt.

If the belt is already out of place, locate the driver's manual or the under-the-hood placard, where you'll find a sketch of the routing.

The tensioner pulley is responsible for keeping the belt tense while making sure it stays aligned the entire time you're driving. While the location of the tensioner pulley can vary depending on the vehicle, you can usually find it at the end of the tensioner, which is typically connected to the accessory drive belt.

To check the alignment of the belt, place a straight edge or laser alignment tool across the face of the pulleys, making sure it touches both pulleys. Then, move the straight edge or laser to the side of the belt and check for any gaps between the belt and the straight edge or laser.