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(14) Remove chain case cover (Fig. 3). MEASURING TIMING CHAIN FOR STRETCH (1) Place a scale next to timing chain so that any movement of chain may be measured. (2) Place a torque wrench and socket on camshaft sprocket attaching bolt and apply torque in direction of Im (30 ft. lb.) with cylinder head installed or 20 N Im (15 ft. lb.) with cylinder heads removed. With a torque applied to (3) Holding a scale even, with dimension reading as shown (Fig. 4 ), along edge of chain links. Apply torque Im (30 ft. lbs.) with cylinder heads installed, or 20 N Im (15 ft. lbs.) with cylinder heads removed. Check amount of chain move- (4) Install a new timing chain, if its movement exceeds 3.175mm (1/8 inch) (Fig. 4). (5) If chain is not satisfactory, remove camshaft sprocket attaching bolt, and remove timing chain with (6) Using a suitable puller remove the crankshaft sprocket. Be careful not to damage the crankshaft (7) Position a new crankshaft sprocket on the shaft, install sprocket with suitable tool and mallet. Be sure (8) Rotate crankshaft so the timing arrow is to the 12 O’clock position. (9) Place timing chain around camshaft sprocket and place the timing mark to the 6 O’clock position. (10) Align the dark colored links with the dot on the camshaft sprocket, place timing chain around crank- (11) Using straight edge to check alignment of tim- ing marks (Fig. 5). (12) Install camshaft bolt and washer. Tighten to 54 N Im (40 ft. lbs.). (13) Rotate crankshaft 2 revolutions. Timing marks should line up. If timing marks do not line up remove (14) Check camshaft endplay. With new thrust plate specification is .0127 to .304 mm (.005 to .012 inches.). (15) Install timing chain snubber. Tighten retaining screws to 12 N Im (105 in. lbs.). These bolts are 20mm long for this model year, they should not INSTALLATION (1) Be sure mating surfaces of chain case cover and cylinder block are clean and free from burrs. Crank- (2) Use a new cover gasket, O-rings. (Fig. 6). Fig. 3 Timing Chain Case Cover Fig. 4 Measuring Timing Chain Wear and Stretch Fig. 2 Engine Bracket 9 - 110 3.3/3.8L ENGINE Ä |