2012 Buick Lacrosse Serpentine Belt Diagram (2024)

FAQs

Where is the serpentine belt diagram? ›

Some vehicles have the serpentine belt diagram located on a decal somewhere in the engine compartment. But if your car does not have a decal, you can easily look up the diagram in a repair manual or repair database. Another option is to take a photo of the old belt before removal.

2012 lacrosse hybrid serpentine belt keeps breaking when going from electric to gas. pulleys are good tensioner good.

While serpentine belts should last a considerable time, certain indicators of aging and wear include squealing noises, cracks, nicks, cuts, tears, missing grooves, power steering failure, and an illuminated battery light while the car is running. Addressing these symptoms promptly can prevent unexpected breakdowns.

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).

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.

A professional mechanic will normally charge between $75 and $120 in labor to remove the old belt and replace it with a new one. If you're thinking about doing this work yourself, make sure you understand the process. You don't want to drive around with an incorrectly installed serpentine belt.

The timing belt is inside the engine and keeps the crankshaft and camshaft in sync. It ensures that the engine intake and exhaust valves open and close in time with the pistons so the engine runs smoothly. The serpentine belt is what keeps the engine accessories running smoothly and efficiently.

Depending on the engine in your vehicle, the serpentine belt may be located at the front of the engine bay, or it may be along one side. There may be engine covers in the way, so be prepared to remove them if need be.

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.

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.

How to know which serpentine belt to buy? ›

You can find the correct size of serpentine belt for your car in the owner's manual or by using an online belt sizing tool. If you are unsure about the size of the serpentine belt you need, it is best to consult a mechanic or an auto parts store.

The average cost for serpentine belt replacement is between $109 and $134. Labor costs are estimated between $57 and $72, while parts range between $52 and $62. Whether you go to the mechanic or do it yourself, replacing a serpentine belt costs $58 to $126.

A broken serpentine belt can result in a dead battery, an overheated engine, loss of power steering, and reduced driving comfort. It is crucial to address a broken belt promptly to avoid further damage and potentially expensive auto repairs.

Since an overheated engine can be due to several different serious causes, you'll want to have your car inspected as soon as possible. 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.