TM 5-3805-261-34
ENGINE MAINTENANCE. (cont)
13-3.
Cylinder Head Assembly Overhaul. (Sheet 5 of 6)
INSPECTION/REPAIR (cont)
8.
Inspect valve seats on combustion
surface. Remove and replace if
cracked or badly burned. Refer
to paragraph 3-12.
9.
Inspect combustion surface for
erosion. Check combustion
chamber fire ring, oil passages,
bolt holes and outer casting
surface. If erosion has reduced
any of these areas to 0.16 inch
or less, you must grind the
combustion surface.
WARNING
Wear safety goggles and
respirator when grinding.
Failure to follow this
procedure may result in
SERIOUS INJURY. If injured,
seek medical aid immediately.
NOTE
Cylinder head may appear
streaked or discolored after
grinding. This appearance is
normal and does not indicate
any defect in either the
material or reconditioning
procedure. New cylinder
heads from the factory may
also have the same appearance
but are completely
satisfactory for use.
10.
Using stone or equivalent, grind
smooth all gas and coolant
errosion on combustion surface
(Figure 13-10).
Figure 13-10.
Go to Sheet 6
13-14
