A lot of stuff used to carry a core charge.
Especially if you’re a younger technician, the concept of a core might seem a little foreign, but traditionally, many parts of the car were saved and the offending items repaired, rejuvenated, and resold.
Rotating electrical (starters/alternators/generators) are still sometimes sold rebuilt, and other times they’re new. Engines, transmissions, heads, and other subassemblies are remanufactured in facilities that specialize in this work. But many parts used to be rebuilt in-shop. Brake shoes are a great example—specialty relining shops used to exist, and many general repair shops (maybe even yours!) that have been open for a long time still have a brake rivet press and shoe grinder gathering dust in the corner.
As times changed, companies began to gather cores to rebuild for parts stores, who would stock the parts on shelves to save mechanics the time of rebuilding failed parts. Units could be ready for hotshot delivery, and then the industry changed yet again to where we are today: new parts replace old. Here’s a few other items you might not have realized were rebuilt and thus carried core charges in the past:
- Water pumps
- Clutches
- Turbochargers
- CV shafts
- Master cylinders and calipers
- Carburetors
Some of these items are still rebuilt today, of course, at differing scales. For instance, OEM CV shafts are often prized by those subjecting them to high-horsepower hijinks. They’re also commonly rebuilt by either mechanics or smaller companies for hard-to-get applications, like side-by-sides or (in America), kei vehicles.