Volvo included the gaps for ventilation. That is the rationale for their actions. The many variants of the five-cylinder engines exhibit minor differences, however they remain fundamentally identical. It is my understanding that Volvo has effectively resolved the cracking concerns in the subsequent models, hence the P1 vehicles should not exhibit the same problem.
The P2R has a dependable engine; yet, it may exhibit sensitivity to heat and sometimes requires additional maintenance based on the desired power output of the user. Individuals who prefer not to modify their engines generally choose for T5 engines, such as the 2.3 or 2.4, because to its less extensive boring and superior strength in stock form compared to other options. These vehicles also like bigger intercoolers and more efficient charge pipes, provided the dimensions are not excessive. This significantly contributes to ensuring high dependability. The standard configuration of these vehicles was suboptimal, which I think contributed to the cracking of the blocks. Numerous hypotheses exist, however.