Where is the idler pulley on an envoy?
Your envoy has both pulleys. The tensioner pulley is on the left side of the motor as you are looking at it, below the power steering pump. The idler pulley is on the right side, below the alternator.
How does the alternator work on a GMC Envoy?
How Your Envoy’s Alternator Works The alternator’s job in your Envoy is to provide electricity as it is running. The battery stores enough voltage to be able to start the engine without the assistance of an alternator. It is turned by a serpentine belt.
What should the voltage be on a GMC Envoy?
Specifically, you’ll need to set it to 20V DC. With your Envoy turned off, you’ll connect the negative side of the meter to the negative battery post or wire. You’ll then touch the positive side of the voltmeter to the positive battery wire. With the engine off, you should get a reading somewhere between 12.0 volts and 12.6 volts.
What are the symptoms of a bad alternator?
Outside of the battery warning light, a dead battery is the most common symptom of a bad alternator. As the alternator can no longer supply your Envoy with an adequate power supply, it will begin to feed off of the reserve in the battery.
How do you change the pulley on an alternator?
PULLEY CHANGING INSTRUCTIONS 1. To remove the alternator pulley, with one hand use an impact wrench to loosen the nut, while holding the alternator fan with the other. It is recommended that protective gloves and eyewear be used. The pulley nut uses standard, right-hand threads, so to remove, rotate in a counter- clockwise direction.
How Your Envoy’s Alternator Works The alternator’s job in your Envoy is to provide electricity as it is running. The battery stores enough voltage to be able to start the engine without the assistance of an alternator. It is turned by a serpentine belt.
What kind of pulley do I need for Denso alternator?
Do not over tighten. NOTE: Typical pulleys are designed for a standard 17mm alternator shaft. Powermaster’s smaller Denso racing units have a 15mm shaft and require installation of the adapter bushing supplied with all racing style alternator pulleys.
How do you change the pulley on a Powermaster?
These alternators have a spacer installed between the nut and bearing to hold the rotor forward, preventing the internal parts from becoming misaligned and rubbing. When installing the pulley, this spacer should be removed and discarded. 2. Install the new pulley, lock washer, and nut by hand.
How can I tell if my idler pulley is bad?
One easily noticeable symptom is a squealing or other strange noise coming from the engine area. This will likely be the beginning stages of idler pulley problems or problems with the serpentine belt.
Why do you need an idler tensioner pulley?
To guide the drive belts, an idler tensioner pulley is used to route them properly around these accessories. This keeps any belts properly aligned and rotating smoothly which ultimately affects the entire internal function of the vehicle. Most vehicles only need one idler pulley for the engine.
How much does it cost to replace an idler pulley?
The cost for the new part should only be anywhere from $40 to $90, while the cost of the labor will be anywhere from $40 to $110. These prices do not include added taxes and fees charged by the auto shop.
What can I do about the idler pulley noise?
The only solution at this point is to replace the idler pulley together with the belt completely. The idler pulley is used to drive the belts in a car’s engine. Most often the car is fitted with one serpentine belt, but sometimes you have 2 or more belts fitted on your car.
Where is the idler pulley located on a car?
Plus, the squealing noise is going to become consistently louder, creating an annoying ride. The idler pulley and belt are located near the front of the engine. You will see the belt rotating in conjunction with the engine. You can find the idler pulley when you look at the serpentine belt moving on the engine.
The cost for the new part should only be anywhere from $40 to $90, while the cost of the labor will be anywhere from $40 to $110. These prices do not include added taxes and fees charged by the auto shop.
To guide the drive belts, an idler tensioner pulley is used to route them properly around these accessories. This keeps any belts properly aligned and rotating smoothly which ultimately affects the entire internal function of the vehicle. Most vehicles only need one idler pulley for the engine.