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(5) Remove cylinder head covers and spark plugs. Refer to this section for procedure. (6) Remove rocker arm and shaft assembly. Refer to this section for procedure. (7) Rotate the crankshaft clockwise, until the num- ber 1 piston is at TDC (Top Dead Center) on the com- (8) With air hose attached to spark plug adapter installed in number 1 spark plug hole, apply 620.5 to (9) Using Tool MD 998772A with adapter 6527 or equivalent, compress valve spring and remove valve (10) Remove valve stem seals by using a valve stem seal tool (Fig. 59). (11) The valve stem seal/valve spring seat should be pushed firmly and squarely over the valve guide CAUTION: Do not remove garter spring around the (12) Follow the same procedure on the remaining 5 cylinders using the firing sequence 1-2-3-4-5-6. Make (13) Remove spark plug adapter tool. rocker arm assembly. Refer to procedure outlined in (15) Install cylinder head covers. Refer to proce- dure outline in this section. (16) Install ignition coils and connect all electrical connectors. (17) Install intake manifold plenum. Refer to Group 11, Exhaust System and Intake Manifold. (18) Connect negative cable. VALVE AND VALVE SPRINGS REMOVAL (1) With cylinder head removed, compress valve springs using the Valve Spring Compressors shown (2) Remove valve retaining locks, valve spring retainers, valve springs and valve spring seat/stem (3) Before removing valves, remove any burrs from valve stem lock grooves to prevent dam- INSTALLATION (1) Coat valve stems with clean engine oil and insert them in cylinder head. (2) If valves or seats have been reground, check valve tip height (A) (Fig. 62). If valve tip height is Fig. 59 Valve Stem Seal—Removal Fig. 60 Valve Seal Garter Spring Fig. 61 Valve Spring Compressors 300M 3.5L ENGINE 9 - 39 REMOVAL AND INSTALLATION (Continued) |