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CONNECTING ROD BEARINGS STANDARD PROCEDURE—CONNECTING ROD Inspect the connecting rod bearings for scoring and bent alignment tabs (Fig. 50) (Fig. 51). Check the Inspect the connecting rod journals for signs of scoring, nicks and burrs. Misaligned or bent connecting rods can cause abnormal wear on pistons, piston rings, cylinder (1) Wipe the oil from the connecting rod journal. in connecting rod. (3) Use piston ring compressor and Guide Pins Special Tool 8507 (Fig. 53) to install the rod and pis- face front of the engine. The “F”’s near the piston (4) Install the lower bearing insert in the bearing cap. The lower insert must be dry. Place strip of Plas- (5) Install bearing cap and connecting rod on the journal and tighten bolts to 27 N·m (20 ft. lbs.) plus a (6) Remove the bearing cap and determine amount of bearing-to-journal clearance by measuring the should indicate the same clearance across the entire width of the insert. If the (7) If the correct clearance is indicated, replace- ment of the bearing inserts is not necessary. Remove Fig. 50 Connecting Rod Bearing Inspection 1 - UPPER BEARING HALF Fig. 51 Locking Tab Inspection 1 - ABNORMAL CONTACT AREA CAUSED BY LOCKING TABS Fig. 52 Scoring Caused by Insufficient Lubrication or Damaged Crankshaft Journal 9 - 164 ENGINE 4.7L AN |