VT 275 DESIGN FEATURES ROCKER ARM ROCKER ARM Cylinder Head Assembly • The VT 275 has an aluminum rocker arm carrier for each cylinder head. The carrier holds the fulcrum plates and the attached rocker arms and can be removed as an assembly from the cylinder head without removing the rocker arms. ROCKER ARM CARRIER ROCKER ARM CARRIER Each rocker arm pivots on a steel ball located by detents in the fulcrum plate. Four head bolts on each cylinder head pass through the two single and two dual fulcrum plates serving to clamp the plates to the carrier. The cylinder head is sealed to the crankcase deck surface with a shim type gasket that must be replaced if any of the head bolts are removed.
The 14mm head bolts are torque to yield and cannot be reused. ROCKER ARM FULCRUM ROCKER ARM FULCRUM The carrier is sealed to the cylinder head with a push-in-place gasket. The cylinder head and carrier are clamped to the crankcase with eight 14mm bolts. Six additional 8mm bolts around the perimeter clamp the carrier to the cylinder head and four additional 8mm bolts serve to clamp the top of the head to the crankcase. Two hollow dowels in the cylinder head are used to align the rocker arm carrier to the cylinder head. INJECTOR PASS- THROUGH DUAL FULCRUM PLATE Rocker Arm Carrier • The rocker arm carrier serves as an attachment point for the fulcrum plates and the rocker arms.
In addition to the head bolts, single fulcrum plates are attached to the rocker arm carrier with one 8mm bolt. The dual fulcrum plates are attached with two 8mm bolts. The fulcrum plates are marked with E and I as assembly aids to show the valves they support. The E and I must be visible after assembly to the head. In addition, the carrier provides a passage for each snap-in-place injector pass- through and the push-in-place glow plug connectors. HEAD BOLTS SINGLE FULCRUM PLATE GLOW PLUG CONNECTOR OPENING 8mm FULCRUM BOLT 18 International ® VT 275 V6 Engine