What design feature is used in the GHG17 oil/coolant module?

The correct choice is an external coolant crossover pipe, which plays a pivotal role in the effective management of coolant flow within the engine system. This design feature helps ensure optimal temperature regulation by allowing coolant to flow between different sections of the engine, promoting more uniform cooling.

In the context of the GHG17 oil/coolant module, the external coolant crossover pipe is particularly advantageous as it aids in enhancing the thermal efficiency of the engine and prevents hotspots that could lead to overheating or other performance-related issues. This strategic positioning of the coolant crossover pipe also simplifies the engine assembly and maintenance processes, as well as optimizes space within the overall engine design.

The options related specifically to an integrated water-pump, internal crossover pipe, or the elimination of the water-pump do not align with the established design principles that support effective coolant management for the GHG17 module, thereby confirming the external coolant crossover pipe as the suitable choice.