Engine Idling rough?

Drive Belt Tensioner Replacement Service

What is the Drive Belt Tensioner all about?
A Drive Belt Tensioner is a pulley mounted to either a spring mechanism or to an adjustable pivot point that is used to keep constant tension on your serpentine belt. That is the big long belt in the front of your engine.

The tensioner rides on the outside surface of the belt to put pressure, or tension, on the belt and against the pulleys that drive things like the alternator, power steering, air conditioner, etc.

Keep in mind:
Tensioners usually come with pulleys; they are normally replaced together. Also, when replacing a tensioner, the drive belt usually must be removed. A mechanic may recommend replacing the belt as well.

What common symptoms indicate you may need to replace the Drive Belt Tensioner?
Unusual noise (squeaky or grinding sound) every time you start the engine.

How important is this service?
The air conditioning, power steering, and alternator in your vehicle are given power through the drive belt. The belt is attached to both the crankshaft and these systems, and transfers power from the engine to drive each of these components. The drive belt tensioner is responsible for keeping the tension in the drive belt, which allows it to continue moving and transferring power. When the drive belt tensioner fails, the tension in the drive belt will begin to diminish, and the vehicle will not operate as well.

Idler Pulley Replacement Service

What is the Idler Pulley all about?
An idler pulley is responsible for guiding and maintaining tension with the drive belt. The drive belt (also called the serpentine belt) connects the engine to various components of the vehicle (such as the air conditioning, power steering, and alternator). Power is transferred from the engine to these systems via the drive belt. The belt is held in place by the idler pulley, which keeps the tension on the drive belt and guides it.

Keep in mind:
When an idler pulley is replaced, it’s a good idea to replace the drive belt as well.

What common symptoms indicate you may need to replace the Idler Pulley?
Noises from the engine
Warning lights are on
Loss of power steering
Car is overheating

How important is this service?
The idler pulley is responsible for keeping your drive belt aligned, and for maintaining the tension in the drive belt. The drive belt is used to transfer power from the engine to the alternator, power steering, and air conditioning, among other systems. If the driver pulley starts to degrade, the drive belt will be less efficient, and your vehicle will be liable to overheat or run poorly. If the idler pulley fully breaks, the drive belt will no longer work at all, and your car won’t run.

Serpentine/Drive Belt Replacement Service

Serpentine/Drive Belt Replacement
What's a serpentine / drive belt?
The serpentine/drive belt or v-belt is a rubber belt that connects the alternator, power steering, and AC to the part of the engine (crankshaft) which transfers the power from the engine to those components. Without this belt, the battery will not get charged and none of the electrical accessory components in the car will work. The serpentine belt and v-belt are also known as "drive belts."

Because of the high amount of heat in the engine, the belt can develop cracks over time and eventually break. If the belt breaks, the steering wheel will be difficult to turn and driving will be hazardous.

In some cars, water pumps are driven by the drive belts. If the belt breaks, water and coolant needed to keep the engine cool will not properly flow to the engine. The engine will overheat, potentially causing severe damage.

Belts
Keep this in mind about serpentine belts:
A car will either have a serpentine belt(s) or v-belt(s). Cars that have a serpentine belt will have one or two belts. Most modern cars have only one belt, driving all the engine accessory components. If the car has v-belts, it will most likely have four belts.

What common symptoms indicate you may need to replace the Serpentine/Drive Belt?
Squealing noise coming from engine if the belt is loose or worn out.
Lack of steering if the belt is broken.
Battery Warning Light is on.
Engine overheats.

Why it's important to replace a serpentine / drive belt:
The drive belts connect the engine to the alternator, air conditioning, power steering, and sometimes the water pump. These belts are how power is transferred from the engines to these other systems. When the belts break, the engine will be unable to transfer power to the alternator, air conditioning, and power steering. Since the alternator is responsible for charging your battery, a broken drive belt means that the electrical components won’t work in your vehicle. The power steering also will fail, which makes it difficult and dangerous to steer. If your car’s water pump is also connected to the drive belt then the engine will not have a properly functioning cooling system, and your vehicle will be likely to overheat.

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