What do the one-piece DD13 and two-piece DD15/DD16 EGR/coolant collectors share in coolant reception?

Prepare for the DTNA Base Engine Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Ace your exam with confidence!

The correct answer highlights that both the one-piece DD13 and the two-piece DD15/DD16 EGR/coolant collectors utilize an external coolant crossover pipe. This design is significant because the external coolant crossover pipe serves to facilitate the efficient circulation of coolant between different components of the engine, helping to maintain optimal operating temperatures.

In these engine designs, the coolant crossover pipe functions by connecting the EGR/coolant collectors to other parts of the cooling system, ensuring that the coolant can flow effectively. This flow is critical for managing heat from the exhaust gases that enter the EGR (Exhaust Gas Recirculation) system, thereby preventing overheating and maintaining engine efficiency.

The other options do not accurately describe the shared features of these models. For instance, a removable internal pipe would imply a component that is not integrally designed with the collector, which is not how these models operate. A direct connection to the engine block is not the primary design characteristic of the coolant collectors; instead, they assist in the coolant system's overall performance. Lastly, stating there is no coolant reception mechanism would negate the very function these collectors serve in managing coolant flow, which is essential for engine operation.

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