How long does it take for a mechanic to replace an alternator?
about two hours
In general, it will take about two hours for you to replace an alternator on your own, though this could vary somewhat depending on your knowledge of car mechanics. If you take your car into a shop in order to have the alternator replaced, timing may vary somewhat, and you may have to leave the car for the day.
What is the warranty on a new alternator?
Most reconditioned alternators come with at least a one-year warranty, while some come with a warranty for up to three years. Some new alternators may carry a limited lifetime warranty. Check with your mechanic to learn how long the warranty is and what it covers.
Why would a new alternator fail?
Many times, the alternator will fail from being “stressed” by a dead or dying battery. The duty cycle of the average alternator will charge a battery while the car is running, and accessories like an air conditioner or lighting system will not give the alternator a break.
What should I do before replacing my alternator?
Check the installation paperwork that came with the replacement alternator first before assuming you have the incorrect unit. Carefully align the working alternator mounting holes and loosely install the mounting bolts and nuts. Ensure all the bolt and/or nut threads are started and tighten them evenly.
Where can I find the alternator regulator plug?
Both the regulator and its three-pronged plug can simply be left in the engine compartment to retain the appearance of originality. A very minor adaptation is needed to connect the D+ line from the dashboard warning light to the back of the new alternator. D+, as I said, is one of the three wires in the three-prong connector.
Can a three wire alternator be replaced by a single wire unit?
Age and repeated plugging and unplugging of the three-pronged plug can cause it to crack and make the spade connectors retreat out the back when you push the plug in. For all these reasons, a nice upgrade to a vintage car is to replace the externally-regulated three-wire alternator with a newer internally-regulated single-wire unit.
What should be the deflection between the drive belt and alternator?
Vehicles with a manual tensioner or the belt tightens with the alternator, there should about ½ inch of deflection in the belt between the pulleys with the greatest distance between them. Once the alternator, drive belt, and electrical connections are reinstalled, scan the work area and make sure nothing has been overlooked.