TM 9-2320-209-20-3-1 4-17. ENGINE MANIFOLD HEATER REMOVAL AND REPLACEMENT (TRUCKS WITH ENGINES LDS 427-2 AND LDS 465-l). TOOLS : 5/16-inch wrench 7/16-inch wrench l/2-inch wrench 7/8-inch wrench 9/16-inch wrench 5/8-inch wrench 3/4-inch wrench l-inch wrench SUPPLIES : Spark plug gasket Heater gasket Solvent, dry cleaning, type II (SD-2), Fed. Spec P-D-680 PERSONNEL : One EQUIPMENT CONDITION : Truck parked, engine off, handbrake set. Preliminary Procedure. Open hood and right side panel. Refer to TM 9-2320-209-10. 4-88