2006 Scion Xb 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.

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 will help you re-route the new belt correctly.

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.

Belt Misalignment

If the belt is not properly aligned with the pulleys, it can put additional stress on the idler pulley, causing it to squeal.

When you start hearing squealing sounds, it is advised to look for any wear on the idler pulley. If you come across scoring marks, then it's one of the signs of a bad idler pulley. The first thing you should do is replace it to prevent the engine belt from losing tension and slipping.

Check for Parallel Alignment: Observe the gap between the straightedge or string and the pulley faces. There should be no visible gap at any point along the pulleys. Use a feeler gauge to measure any gaps if necessary. This helps determine if there's a need for adjustment.

Moreover, Gates provides the following recommendation for inspecting automatic belt tensioners: - With the engine off and cold rotate the tensioner arm through its entire range of motion. Any sticking or roughness indicates wear on the tensioner bearing surfaces and will require replacement of the tensioner.

The way to remove tension will be to pivot the tensioner using a tool (1) on the nut of the tensioner pulley, or (2) a special tool-lug outcropping from the tensioner or (3) in a square opening in the bracket of the tensioner pulley, cover or cap that protects the spring.

Q: How tight should a belt fit? A: As a general guide, you should be able to slide one finger between the belt and your body.

What does a tight serpentine belt sound like? ›

The belt should be snug on the pulleys – not too tight and not too loose. A loose belt can cause squealing when the engine is under load while an excessively tight belt can cause squealing at idle.

Regular visual inspections of the serpentine belt can reveal important information about its condition. If you notice cracks, fraying, or signs of wear on the belt's surface, it's a clear indication that it needs replacement.

Most vehicles nowadays usually have a belt routing sticker located somewhere in the engine compartment, making it even easier.

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.