Section IV. HOUSINGS, CASTINGS, PLATES

TM 5-3835-222-BD

Section IV. HOUSINGS, CASTINGS, PLATES

3-10. General. Castings or plates may be servicable even with holes or cracks providing the internal

structure is not significantly weakened. Internal structures such as crankshaft bearing journal webs are

necessary to distribute loads within the casting. Some damage to these elements of the structure

can be allowed, but fatigue failures from crack growth cannot be predicted, and service life will

depend on the extent of damage.

3-11. Engine Housing Damage. Small cracks or holes may develop in a cylinder head, block or

engine housing, caused by vibrations, overheating, or explosive shocks. Cracks that do not harm the

structural strength of a housing can be deferred, but cracks that allow coolant or oil to escape

must be repaired. Large holes or cracks will require exchange of the component. Frequent fluid

level checks must be performed.

Limitations:

Degraded output.

Personnel/Time Required:

3 soldiers - 2.0 - 24.0 hrs.

Materials/Tools:

Fiberglass Kit

Lift

Sandpaper (appendix C, section II, item 30)

Epoxy (appendix C, section II, item 11)

Deleted.

Permatex (appendix C, section II, item 22)

Procedural Steps:

Option 1:

a. Remove all paint from around the crack

b. Cover the crack and 1/4 inch or more of the surrounding area with quick-drying epoxy plastic.

c. Allow the epoxy to harden before running an engine. Use heat (heat lamp) to speed up curing

of epoxy.

Option 2: Repair of small crack or hole.

a. Remove all paint from around the area where metal plate is to be positioned.

b. Cover the area with a plate from any available metal large enough to cover the crack or hole.

Seal the edges of the plate with quick-drying epoxy.

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