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 TM 55-1905-219-14-11
5-79. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECT (Cont)
k.
If used, replace damaged or broken cylinder
head studs. Drive new studs to a height of
4 3/8 inch + 1/32 inch above the block at a
minimum of 75 lb. ft. (101.7 Nm) torque.
Also, examine the cylinder head retaining
bolt holes. If the threads are damaged,
use a tap to "clean-up" the threads or
install an helical thread insert.
l.
The tapped holes in the cylinder blocks may
be tapped with a 5/8 inch-11 UNC3B thread tap.
The stud holes and unplugged bolt holes must
have the thread extending 1.84 inches below
the block surface.
m. Check the remaining cylinder block surfaces
and threaded holes. Check all of the mating
surfaces, or mounting pads, for flatness,
nicks and burrs. Clean-up damaged threads in
tapped holes with a tap or install helical
thread inserts if necessary.
n. After inspection, if the cylinder block is not
to be used immediately, spray the machined
surfaces with engine oil. If the block is to
be stored for an extended period of time,
spray or dip it in a polar-type rust preventive
such as Valvoline Oil Company's "Tectyl 502-C",
or equivalent. Castings free of grease or oil
will rust when exposed to the atmosphere.
NOTE
Before a reconditioned or new service replacement cylinder block is used, steam
clean it to remove the rust preventive and blow out the oil galleries with
compressed air.
5-1086
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