Post by
OriginalWheelman »
https://forums.nicoclub.com/originalwheelman-u40105.html
Mon May 20, 2013 8:06 pm
Just because it bolts in does not mean that the amperage, voltages, etc are correct. It could fit in the hole but be entirely wrong. This can happen when a manufacturer changes generations or change things mid build run on a car. Also, many companies sub-contract out parts in the manufacturing process. For example, if you ever look at an RB20, the CAS is made by Mitsubishi. These manufacturers can use the same case for multiple internals on totally different cars. There is also the possibility that one of the regulators inside the alternator are faulty. Just because it bench tested properly doesn't mean it will work properly inside the car under sustained load and use.
Also, there is a big difference between Re-built and Re-manufactured. Rebuilt means they took a bad core, tested it, and replaced the broken parts, leaving whatever used parts that were working inside it. These can and often do fail shorty after. Re-manufactured parts are taken apart and all the working and non working parts are replaced. This is more expensive, but they are essentially new at this point.