Clean and Repair.
Dry cleaning solvent PD-680, Type III, or equivalent, is flammable and moderately toxic to the
skin, eye, and respiratory protection is required to avoid injury to personnel.
Acids used for cleaning purposes are highly toxic to the skin, eyes, and respiratory tract.
Skin, eye, and respiratory protection is required. Keep sodium bicabonate solution at hand to
Compressed air used for cleaning or drying can create airborne particles that may enter the
eyes. Pressure shall not exceed 30 psi (207 kPa). Wearing of goggles Is required to avoid
Injury to personnel.
Clean oil and grease deposits from the cylinder block surface using cleaning solvent PD-680, Type IIl, or
equivalent. Use solvent and bristle brushes of suitable size to dean lubrication and fuel passages. Clean
rust and scale deposits from water passages using a circulating acid bath and acid MIL-H-1 3528. Rinse
the block thoroughly, and blow out all lubrication, fuel, and water passages using compressed air.
Grinding operations create airborne, abrasive dust and particles. Respiratory and eye
protection Is required to avoid Injury to personnel.
Welding operations produce heat, highly toxic fumes, Injurious radiation, metal slag, and
airborne particles Welding goggles, the proper tinted lenses, apron or jacket, and welder's
boots are required to avoid Injury to personnel.
Repair cracks and porosity in the cylinder block by grinding out the defect and welding in accordance with
Repair defective camshaft bushing bores by installing bushings 3376347 using camshaft bore salvage kit
3376345, and main bearing boring tool ST-11 77.
If the cylinder block head gasket surface requires machining, postpone counterbore repairs
until the machining has been completed.
Resurface a damaged counterbore ledge in the cylinder block using cylinder block counterbore tool ST-1
Repair a damaged or oversize counterbore, or counterbores that have been resurfaced to the maximum
depth, by installing a repair sleeve 3376222 using counterbore salvage tool 3375820, liner counterbore tool
ST-11 68, cutter assembly 3376219, sleeve driver 3376223, guide plate 3376224, and sleeve driver shaft
Repair a damaged secondary bore by installing a sleeve. Bore the cylinder block to accept the sleeve, and
bore the sleeve to a diameter of 7.155 to 7.157 inches (181.74 to 181.79 mm).
Repair pits and erosion at the lower liner bore entry chamfer by building up with plastic steel. After drying,
sand smooth to the original entry chamfer size using emery cloth P-C-1673.