Components & Structure
The model consists of two separate but interconnected fluid circuits housed within a single unit:
| Component | Description | Material (Typical) |
| 1. Outer Shell (Coolant Jacket) | The main body of the cooler that acts as a reservoir for engine coolant. It encapsulates the core. | Aluminum or Brass (corrosion-resistant) |
| 2. Inner Core / Tube Stack | A series of small tubes or a single convoluted tube that runs through the shell. This is the passage for engine oil. | Typically aluminum, often with finned surfaces to increase heat transfer area. |
| 3. Inlet & Outlet Ports (Oil) | Two ports connected to the inner core for the flow of hot oil in and cooled oil out. | Machined aluminum with threaded ports. |
| 4. Inlet & Outlet Ports (Coolant) | Two ports on the shell for the flow of coolant in and out. | Machined aluminum with threaded ports. |
| 5. Mounting Interface / Adapter | Often integrated into the engine block, oil filter housing, or a separate sandwich plate adapter. | Cast aluminium |