2015 Jeep Wrangler Serpentine Belt Diagram (2024)

FAQs

How do you find a serpentine belt routing diagram? ›

Vehicle manufacturers produce serpentine belt diagrams that are designed to aid with this task. Some vehicles have the serpentine belt diagram located on a decal somewhere in the engine compartment.

The belt should have about a half an inch of play when at the appropriate tightness. If there is less than a half an inch, the belt will need to be loosened, if there is more, it will need to be tightened.

The average cost for a Jeep Wrangler Serpentine Belt Replacement is between $129 and $149.

If the belt is wobbling back and forth or the pulley is not spinning straight and wobbling, the pulley may be misaligned, which can cause the belt to squeal. Also, check if the belt is running in the center of the pulley and is not running off to the side.

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 industry standard number, frequently denoted as the “PK” number, is printed next to the manufacturer's part number on almost every serpentine belt produced, and can be seen in the examples below. WHAT IS A “PK” NUMBER? A “PK” number is a worldwide standard metric belt measurement printed on most serpentine belts.

You can replace only the pulley, or you can buy a new tensioner with a new pulley attached, or you can buy a kit with a new belt, tensioner/pulley, and idler pulley if there is one, and do it all.

That is why it's so important to stay ahead on your car service and get your belt replaced before it completely breaks. Depending on your vehicle, and the other service you may or may not be having done at the time, the whole process of replacing the serpentine belt should take no more than two hours.

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.

Excessive Wear: A serpentine belt that is too tight can cause excessive wear on the belt and other components, leading to premature failure. The added tension can cause the rubber on the belt to wear down more quickly, which can cause the belt to crack or break.

What are the symptoms of a bad idler pulley? ›

The idler pulley is a component that supports the movement of your vehicle's drive belt. Common symptoms of a malfunctioning idler pulley include corrosion on the pulley's surface, chattering and squealing noises, and slow spinning. Recommended idler pulley brands include Replacement, Gates, and Dayco.

Check if the belt runs centrally on the pulleys. Any sideward movement or slippage can indicate misalignment. Straightedge or String Line: Place a straightedge or taut string along the faces of the pulleys to see if they line up perfectly. Any deviation from a straight line suggests angular or parallel misalignment.

The serpentine routing is mainly used to compensate the parts with less delay in the "same group of related" signal lines.

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.