How much to change an alternator

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  • The Complete Alternator Replacement Cost Guide
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  • How much does Alternator Repair cost? Get an estimate Disconnect the battery prior to replacing the alternator, as with all electrical repairs. Unhook the drive.

    Jul 24, If your alternator stops working it will no longer charge the battery. power other systems in the car, makes life much harder for your alternator.

    The exact price of a new alternator really depends on what car you have. the mechanic you take it to and the part condition of the part you use to replace it.

    Soon after, all electrical components will being to lose power, the vehicle will stall, and jump-starting will not be effective. As mentioned before, the alternator can be placed in a location that is inaccessible without extensive deconstruction. The technician usually finds that out with a quick test before the work even begins. What are the signs of bad alternator? Again, your mechanic will be able to diagnose the exact cause of the issue so take your car to a garage before it becomes more serious.

    How Much Does It Cost to Replace an Alternator?

    All of the electrical components on a vehicle need electrical power to operate, and the battery has a finite amount of storage. This creates the need for a built-in battery charger called the alternator, which works in conjunction with the battery and starter to form the starting and charging system.

    The alternator charges the battery and powers the vehicle's electrical system when the engine is running. It provides electrical energy to keep the battery fully charged and to power vehicle systems in use e. The alternator is mounted on the engine, and creates power much like a wind-energy turbine, except it is turned by the serpentine belt, or accessory drive belt instead of wind. As it spins, it creates electricity, and the built-in voltage regulator and rectifier are responsible for ensuring the current is correct for the vehicle.

    The alternator produces an alternating current AC , which is changed to usable direct current DC by the rectifier diodes within the alternator. Alternator failure while driving will cause the battery light to illuminate on the dashboard. Soon after, all electrical components will being to lose power, the vehicle will stall, and jump-starting will not be effective. The alternator can also fail due to the bearing that holds the internal rotating assembly, causing a grinding noise that changes with engine speed.

    More symptoms of a bad alternator. A vehicle with a weak alternator may be able to drive to a repair facility for diagnosis, but a vehicle with a failed alternator will not run after an external charger is removed from the battery. Alternator failure is seemingly common, but in most cases an alternator can last , - , miles without incident.

    Harsh driving conditions, and aftermarket electrically powered accessories can decrease the useful life of the alternator. Since the alternator is part of a group of components known as the starting and charging system, when there is a failure, the entire system must be tested to prevent mis-diagnosis, and unnecessary component replacement.

    Repair facilities use professional starting and charging system test equipment that automatically or manually tests every component in the starting and charging system simultaneously, and definitively. Prior to this test being conducted, the entire system must be physically inspected for damage, or lack of continuity. When replacing the alternator, the technician must remove the battery cables to prevent electric shock. Afterwards, the accessory drive belts or serpentine belts must be removed from the alternator, along with electrical connectors, and several bolts.

    Once the bolts are removed, the alternator is free from the alternator brackets, and can be removed. Replacement is in reverse order, and proper torque must be applied to prevent damage.

    The vehicle will then be retested in the same manner to ensure the repair is complete. Since the alternator requires the removal of the serpentine belt, replacing the serpentine belt is recommended if the belt is worn, or the service interval has been reached. If the battery cables were identified as having physical damage or extensive corrosion, they should be replaced as well. On most modern vehicle's, the amount of room to work can be extremely limited, and that can play a significant role in repair cost.

    In some cases suspension components, drive axles, cooling fans, and bumpers must be removed to access the alternator. The manufacturer supplies an alternator with the vehicle that produces appropriate amperage for the original components.

    How to Change (remove & replace) an Alternator

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