| The lower Engine part with main rod bearing journals. It converts reciprocating motion to rotary motion. | |
| The removable part of the big end of the connecting rod | |
| Part that supports and reduces friction between a stationary moving part or two moving parts. | |
| And automotive terminology, the main part of a heat exchanger, such as a radiator, evaporator or heater. Usually made of tubes, surrounded by cooling fans, used to transfer heat from the coolant to the air. |