A fluid system for an intercooler has a fill level defining a maximum volume of liquid in the fluid system, a main fluid circuit and a secondary fluid volume. The main fluid circuit includes the intercooler, and one or more passages through which fluid is circulated with operation of the engine, and at least a portion of the main fluid circuit is located above the fill level. The secondary fluid volume has at least a portion located below the fill level that communicates with the main fluid circuit to receive liquid from the main fluid circuit at least when the engine is not operating to drain at least some of the liquid from the portion of the main fluid circuit that is located above the fill level. This reduces the volume of liquid that remains above the fill level when the engine is not operating.