What is that called

Hello,
Does anyone knows what these parts (?) are called? I seem to have an oil leak from the top one connected to the enghine block. Its like the part where the crankshaft rests on. The leak really isnt severe, barely leaking from the gasket maker/sealant. I have to pull the engine out this winter anyway so I am not worried about the repairs.
Thanks.
552396557_1305356777729397_6687072963921355351_n

sry for the awful drawing btw

Top to bottom:

Cylinder block
Bedplate
Upper oil pan
Oil pan

thank you

1 Like