TM-9-2350-358-BD M109A6 Battlefield Damage Assessment and Repair Download
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TM 9-2350-358-BD SECTION II. ENGINE FAILURE 4-4. GENERAL Engine internal components are not easy BDAR fixes because of the tolerances and balances necessary to contain the pressure and forces of the burning fuel, and the need for mechanical integrity of the reciprocating and rotating parts. The best repair for internal engine components is replacement parts from the supply system. a. It is possible, however, to mix and match parts from two or more damaged engines to reassemble one good engine with used parts. Example, if one engine has a damaged cylinder set or top end, the good cylinder/head set can be matched with a good, used short block to build a serviceable spare. b. Certain internal engine component failures such as cam followers or rocker arm shaft galling may be ignored. Other failures, such as broken rings and galled pistons will result in engine destruction if the vehicle is operated. 4-3