There is described an
internal combustion engine (1) including: - a
crankcase (2) comprising one or more cylinders (CY), - a head (3) arranged atop said
crankcase (2) and comprising a flow module (4) and a
cam carrier module (5), the
cam carrier module (5) being arranged atop said flow module (4), said flow module (4) comprising one or more inlet conduits and one or more exhaust conduits, wherein at least one inlet conduit and at least one exhaust conduit are associated with a respective cylinder (CY), - a blow-by
recovery circuit (B1, B2, B3) through which fluid communication is established between the
crankcase (2), the flow module (4) and the
cam carrier module (5), wherein at least one of said crankcase (2) and cam carrier module (5) comprises at least one
access port (8, 9, P2) in fluid communication with said blow-by
recovery circuit, a sensor
assembly (10; 10') comprising a cap (12; 12') fixed at the
access port (8, 9, P2) and including an installation seat (13,; 13') for a
pressure sensor (15) within which a reading channel (14) is provided, the reading channel (14) having a first end (A) arranged at the
access port (8, 9, P2) and a second end (B) at which the
pressure sensor (15) is received, wherein the second end (B) of the reading channel (14) is arranged at a higher geometrical elevation than the first end (A) of the reading channel.