Cylinder Assembly Detailed Description - Continental Motors TSIOL-550-C Operation, Maintenance & Installation Manual

Cylinder Assembly Detailed Description

The aluminum alloy head castings are heated and
valve seat inserts installed before the head is
screwed and shrunk onto a steel alloy barrel to make
the permanent head and barrel assembly. The
cylinder barrel is nitrided for wear resistance. Intake
and exhaust valve guides are pressed into the heated
cylinder assembly. Special helical coil thread inserts
are installed in upper and lower spark plug holes.
The cylinder intake and exhaust ports are located
below the cylinder head as installed. Exhaust valve
faces are Stellite and stem tips are hardened. Valve
FIGURE 16-2. CYLINDER ASSEMBLY DESCRIPTION
stems are solid. A rotocoil assembly retains the two
concentric springs surrounding the exhaust valve
and is locked to the exhaust valve stem by tapered,
semi-circular keys which engage grooves around the
stem. The controlled rotating action of this type
retainer helps to prevent burning and eroding of the
valve and valve seat. A retainer retains the two
concentric springs surrounding the intake valve and
is locked to the intake valve stem by tapered, semi-
circular keys which engage grooves around the stem.
The valve rocker cover is stamped sheet metal and
one is used per cylinder.
Cylinders
16-3