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(2) Clean varnish deposits from inside of tappet body above plunger cap. (3) Invert tappet body and remove plunger cap, plunger, flat or ball check valve, check valve spring, CLEANING AND ASSEMBLY (1) Clean all tappet parts in a solvent that will re- move all varnish and carbon. (2) Replace tappets that are unfit for further ser- vice with new assemblies. (3) If plunger shows signs of scoring or wear, valve is pitted, or valve seat on end of plunger indicates (4) Assemble tappets (Fig. 27). INSTALLATION (1) Lubricate tappets. (Fig. 26). (4) Install yoke retainer and torque screws to 12 N Im (105 in. lbs.) (Fig. 26). (5) Install cylinder heads. Refer to cylinder head installation of this section for procedure. (6) Start and operate engine. Warm up to normal operating temperature. CAUTION: To prevent damage to valve mechanism, VALVE TIMING (1) Remove front valve cover and all 6 spark plugs. the compression stroke. (3) Install a degree wheel on the crankshaft pulley. spark plug hole. Using the indicator find TDC on the (5) Position the degree wheel to zero. (7) Place a 5.08mm (.200 inch) spacer between the valve stem tip of #2 intake valve and rocker arm (8) Install a dial indicator so plunger contacts the #2 intake valve spring retainer as nearly perpendic- (9) Rotate the engine clockwise until the in take valve has lifted .254mm (0.010 inch). CAUTION: Do not turn crankshaft any further clock- (10) Degree wheel should read 3 degrees BTDC to 4 degrees ATDC. TIMING CHAIN COVER, OIL SEAL AND CHAIN COVER REMOVAL (1) Disconnect battery. Group 7 for procedure. (3) Support engine and remove right engine mount. (4) Raise vehicle on hoist. Drain engine oil. necessary to remove transmission inspection cover. (6) Remove right wheel and inner splash shield. Group 7 for procedure. (8) Remove A/C compressor and set aside. (11) Remove idler pulley from engine bracket. (Fig. 3). Fig. 27 Hydraulic Roller Tappet Assembly Fig. 1 Removing Crankshaft Pulley Ä 3.3/3.8L ENGINE 9 - 109 |