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ken99 -> RE: Aftermarket alternator (2/8/2008 4:51:45 PM)
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Buying an OEM altenator from the dealer is the sure bet, but as you know, the most expensive option. I agree with the other forum member's advice, don't buy a generic alternator that may/may not fit and may/may not work in the car. A used one from a junk yard will fit, but you don't know it's history and it may not be any better than the one you are replacing.
If you are trying to save some bucks, you have two choices. 1) Most reputable auto parts stores (e.g. NAPA, Carquest, Autozone) offer lines of remanufactured altenators. The casting or body will be an exact match to your old alternator, but the windings, diodes, bearings, etc, have all been replaced with new parts, inspected and tested. The stores usually carry 3 lines, a "good", "better" and "best" grade. If you are going to keep the car for a while, stick to the "best". They will cost a little more, but are more rigorously tested before shipping. "Best" grades usually come with a longer warrenty. Take your old alternator in with you so you can confirm the fit. You can then swap it out, so there will be no core charge. Also, some stores will swap the pulley for you as well. 2) Ask around if there is a reputable generator/alternator shop in your area. These are specialty shops that can rebuild your alternator with new guts, or sometimes they carry rebuilt and new replacements. They too will swap the pulley and may offer an installation service. I prefer this approach because if something goes wrong during the warrenty period, you have a local person to deal with.
I've replaced several alternators from both sources and I've had only one that didn't outlast the original alternator or the car for that matter.
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