TM 9-2320-209-20-3-1 4-25. INTAKE MANIFOLD (TOP-MOUNTED, COVERED) FLAME HEATER ELBOW REMOVAL AND REPLACEMENT (TRUCKS WITH ENGINES LD465-1, LD465-lC, AND LDT 465-lC). TOOLS : NOTE This task is the same for all three model engines, but on some engines intake manifold heater elbow is mounted in a different position. This task is shown for the LD 465-lC engine. 3/8-inch open end wrench 7/16-inch open end wrench 1/2-inch open end wrench 3/4-inch open end wrench 7/8-inch open end wrench l-inch open end wrench 9/16-inch open end wrench 3/8-inch flat-tip screwdriver SUPPLIES : Spark plug gasket Manifold heater elbow gasket PERSONNEL : One AND EQUIPMENT CONDITION : Truck parked, engine off, handbrake set. a. Preliminary Procedures. (1) Open hood. Refer to TM 9-2320-209-10. (2) Disconnect battery ground cable. Refer to para 7-58, 4-131