Group 21 Design and Function
17
Cylinder head
The engine has individual, cast iron cylinder heads each car-
rying four valves. The injectors are centrally positioned in
copper sleeves between the valves.
Cylinder block
The cast iron cylinder block has bearing caps of ductile cast
iron. The main bearing caps are tied to the block sides by re-
inforcing plates.
Seals
Cylinder block - Cylinder liners - Cylinder heads
A direct contact sealing method is used. The upper sealing
face of the liner seals directly against the cylinder head with-
out a gasket. The liner incorporates a flame retainer. Be-
neath the liner collar is a sealing ring. In addition, there is an
extra sealing ring between the liner and cylinder block. The
bottom seals of the liner consists of three rings.
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