TM 9-2320-361-34 3-17. lNTAKE AND EXHAUST MANIFOLDS MAINTENANCE (Contd) 4. Inspect four studs (12) for looseness, stripped, cross-threaded, or other damage. Repair thread damage. If more repair is required, replace intake manifolds (4). 5. Inspect gasket surfaces on intake manifold (4) and intake manifold (9) for nicks, burrs, or scratches. Repair with fine mill file or crocus cloth. 6. Inspect intake manifold (4) and exhaust manifold (9) for cracks or bends. If damaged, replace. 3-53