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(2) To replace spark plug tube seals: (a) Using a suitable pry tool, carefully remove tube seals. (b) Position new seal with the part number on seal facing cylinder head cover. (c) Install seals using Special Tool MD-998306 (Fig. 43). (3) Install cylinder head cover bolts and tighten to 12 N·m (105 in. lbs.). (4) Install the ground strap retaining bolt to the cylinder head cover. (5) Install the wire harness track retaining nuts (Fig. 41). (6) Install the ignition coils. Tighten mounting screws to 6.7 N.m (60 in. lbs.) (Fig. 41). (7) Connect the ignition coil electrical connectors (Fig. 41). (8) Install upper intake manifold (Refer to 9 - ENGINE/MANIFOLDS/INTAKE MANIFOLD - INSTALLATION). (9) Connect negative battery cable. VALVES & SEATS -INTAKE/ DESCRIPTION Valves are made of highly heat-resistant steel and are chrome plated to prevent stem scuffing. The OPERATION The intake valve allows the air/fuel mixture to enter the combustion chamber. The exhaust valve seal the combustion chamber during the compression STANDARD PROCEDURE - VALVE AND VALVE The valve face and valve seat angles are shown in (Fig. 44). VALVES (1) Inspect the remaining margin after the valves are refaced (Refer to 9 - ENGINE - SPECIFICA- VALVE SEATS (1) When refacing valve seats, it is important that the correct size valve guide pilot be used for reseat- (2) Measure the concentricity of valve seat using dial indicator. Total runout should not exceed 0.051 Fig. 43 Spark Plug Tube Seal Installation 1 - SPECIAL TOOL MD-998306 Fig. 44 Intake and Exhaust Valves 1 - MARGIN Fig. 45 Valve Face & Seat 1 - SEAT WIDTH CS ENGINE 3.5L 9 - 43 COVER CYLINDER HEAD - RIGHT (Continued) |