A crankcase assembly for a reciprocating machine, comprising: a crankcase configured to receive a crankshaft therein; a wet cylinder liner, the wet cylinder liner being located in the crankcase; a cylinder head configured to charge gas into the wet cylinder liner and discharge pressurized gas from the wet cylinder liner, the cylinder head being mounted on the crankcase at a cylinder head side of the wet cylinder liner opposite a crankshaft side of the wet cylinder liner; a cylinder head gasket between the cylinder head and the crankcase configured to prevent leakage of pressurized gas from the wet cylinder liner, the cylinder head gasket being disposed circumferentially spaced from an inner wall of the wet cylinder liner, a circumferential coolant channel formed between the inner crankcase wall and an outer wall of the wet cylinder liner; a lower sealing arrangement located between the inner crankcase wall and the wet cylinder liner on a crankshaft side of the circumferential coolant channel, the lower sealing arrangement being configured to prevent leakage of coolant fluid; a first upper sealing arrangement located between the inner crankcase wall and the wet cylinder liner on a cylinder head side of the circumferential coolant channel, the first upper sealing arrangement being configured to prevent leakage of coolant; and a second upper sealing arrangement (26, 26') spaced axially apart from the first upper sealing arrangement, the second upper sealing arrangement (26, 26') being located between the first upper sealing arrangement and an inner region of the wet cylinder liner in which gas is pressurized, the second upper sealing arrangement (26, 26') being configured to prevent pressurized gas being applied to the first upper sealing arrangement, characterized in that at least one venting channel configured to prevent a negative effect of pressurized gas which overcomes the second upper sealing arrangement on the first upper sealing arrangement is arranged in the inner crankcase wall between the first upper sealing arrangement and the second upper sealing arrangement (26, 26'). a crankcase configured to receive a crankshaft therein; a wet cylinder liner, the wet cylinder liner being located in the crankcase; a cylinder head configured to charge gas into the wet cylinder liner and discharge pressurized gas from the wet cylinder liner, the cylinder head being mounted on the crankcase at a cylinder head side of the wet cylinder liner opposite a crankshaft side of the wet cylinder liner; a cylinder head gasket between the cylinder head and the crankcase configured to prevent leakage of pressurized gas from the wet cylinder liner, the cylinder head gasket being disposed circumferentially spaced from an inner wall of the wet cylinder liner, a circumferential coolant channel formed between the inner crankcase wall and an outer wall of the wet cylinder liner; a lower sealing arrangement located between the inner crankcase wall and the wet cylinder liner on a crankshaft side of the circumferential coolant channel, the lower sealing arrangement being configured to prevent leakage of coolant fluid; a first upper sealing arrangement located between the inner crankcase wall and the wet cylinder liner on a cylinder head side of the circumferential coolant channel, the first upper sealing arrangement being configured to prevent leakage of coolant; and a second upper sealing arrangement (26, 26') spaced axially apart from the first upper sealing arrangement, the second upper sealing arrangement (26, 26') being located between the first upper sealing arrangement and an inner region of the wet cylinder liner in which gas is pressurized, the second upper sealing arrangement (26, 26') being configured to prevent pressurized gas being applied to the first upper sealing arrangement, characterized in that at least one venting channel configured to prevent a negative effect of pressurized gas which overcomes the second upper sealing arrangement on the first upper sealing arrangement is arranged in the inner crankcase wall between the first upper sealing arrangement and the second upper sealing arrangement (26, 26').