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(a) Tighten all bolts to 4.5 N·m (40 in. lbs.). (5) Install ignition coil and spark plug wires. Tighten fasteners to 12 N·m (105 in. lbs.). (6) If the PCV valve was removed, apply Mopar t Thread Sealant with Teflon to threads and install (7) Connect PCV and make-up air hoses to cylin- der head cover. (8) Install upper intake manifold. (Refer to 9 - ENGINE/MANIFOLDS/INTAKE MANIFOLD - INSTALLATION) INTAKE/EXHAUST VALVES & DESCRIPTION The valves are made of heat resistant steel. They have chrome plated stems to prevent scuffing. Viton CLEANING (1) Clean all valves thoroughly and discard burned, warped and cracked valves. VALVE SPRINGS & SEALS REMOVAL REMOVAL - CYLINDER HEAD ON (1) Remove cylinder head cover (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - REMOVAL). (2) Remove camshafts (Refer to 9 - ENGINE/CYL- INDER HEAD/CAMSHAFT(S) - REMOVAL). (3) Rotate crankshaft until piston is at TDC on compression. (4) With air hose attached to adapter tool installed in spark plug hole, apply 90-120 psi air pressure. (5) Using Special Tool MD-998772-A with adapter 6779 (Fig. 33), compress valve springs and remove (6) Remove valve spring(s). stem seal tool (Fig. 35). CYLINDER HEAD OFF (1) With cylinder head removed from cylinder block, compress valve springs using a universal valve (2) Remove valve retaining locks, valve spring retainers, valve stem seals and valve springs. (3) Before removing valves, remove any burrs from valve stem lock grooves to prevent dam- (4) Inspect the valves. (Refer to 9 - ENGINE/CYL- INDER HEAD/VALVE SPRINGS - INSPECTION) INSPECTION (1) Whenever valves have been removed for inspec- tion, reconditioning or replacement, valve springs • Valve Closed Nominal Tension—75 lbs. @ 38.0 mm (1.50 in.) • Valve Open Nominal Tension—134 lbs. @ 29.75 mm (1.17 in.) (2) Inspect each valve spring for squareness with a steel square and surface plate, test springs from both Fig. 32 Cylinder Head Cover Tightening Sequence (Typical Cover Shown) Fig. 33 Valve Spring - Removal/Installation 1 - VALVE SPRING COMPRESSOR MD 998772A RS ENGINE 2.4L 9 - 33 CYLINDER HEAD COVER (Continued) |