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NOTE: To reset the primary timing chain tensioner, (11) Purge oil from timing chain tensioner using the following procedure: a. Remove the tensioner from tensioner housing (Fig. 56). b. Place the check ball end of tensioner into the shallow end of Special Tool 8186 (Fig. 57). c. Using hand pressure, slowly depress tensioner until oil is purged from cylinder. d. Reinstall the tensioner into tensioner housing. (12) Reset timing chain tensioner using the follow- ing procedure: e. Position cylinder plunger into the deeper end of Special Tool 8186 (Fig. 58). f. Apply a downward force until tensioner is reset. NOTE: If oil was not first purged from the ten- arm of Special Tool 8186 to unseat the tensioners check ball. CAUTION: Ensure that the tensioner is properly (13) Install chain tensioner into the right cylinder head (Fig. 53). (14) Starting at the right cylinder bank, insert a 3/8” square drive extension with a breaker bar into (15) Turn the left side camshaft by inserting a 3/8” square drive extension with a breaker bar into intake (16) Rotate engine slightly clockwise to remove timing chain slack, if necessary. (17) To arm the timing chain tensioner: Use a flat bladed pry tool to gently pry tensioner arm towards (18) Install the timing chain cover, crankshaft damper, and cylinder head covers. (19) Install camshaft position sensor and connect electrical connector. (20) Install upper intake manifold. Refer to Group 11, Exhaust System and Intake Manifold. NOTE: After installation of a reset tensioner, engine CRANKSHAFT SPROCKET REMOVAL (1) Remove primary timing chain. Refer to proce- dure outlined in this section. CAUTION: Use care not to turn crankshaft while (2) Remove crankshaft sprocket by installing the crankshaft damper bolt and using Special Tool 1023. INSTALLATION (1) Install crankshaft sprocket using Special Tools 6780-1 and 8179 (Fig. 61) until sprocket bottoms (2) Verify that crankshaft sprocket is installed to proper depth by measuring from sprocket outer face 60.50 mm (1.5374 60.002 in.). (3) Install primary timing chain. Refer to proce- dure outlined in this section. Fig. 59 Timing Chain Tensioner Arming LH 2.7L ENGINE 9 - 43 REMOVAL AND INSTALLATION (Continued) |