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CRANKSHAFT OIL SEAL - DIAGNOSIS AND TESTING—REAR SEAL AREA Since it is sometimes difficult to determine the source of an oil leak in the rear seal area of the If the leakage occurs at the crankshaft rear oil seal area: (1) Disconnect the battery. cover and inspect rear of block for evidence of oil. (a) Circular spray pattern generally indicates seal leakage or crankshaft damage. (b) Where leakage tends to run straight down, possible causes are a porous block, distributor seal, case as outlined in the section, Inspection (Engine oil CAUTION: Do not exceed 20.6 kPa (3 psi). (5) If the leak is not detected, very slowly turn the crankshaft and watch for leakage. If a leak is CAUTION: Use extreme caution when crankshaft (6) For bubbles that remain steady with shaft rotation, no further inspection can be done until dis- (7) After the oil leak root cause and appropriate corrective action have been identified, (Refer to 9 - BLOCK/CRANKSHAFT OIL SEAL - REAR - REMOVAL). REMOVAL NOTE: This procedure can be preformed in vehicle. (1) If being preformed in vehicle, remove the transmission. (2) Remove the flexplate (Refer to 9 - ENGINE/ ENGINE BLOCK/FLEX PLATE - REMOVAL). NOTE: The crankshaft oil seal CAN NOT be reused NOTE: The crankshaft rear oil seal remover Special (3) Using Special Tool 8506 (Fig. 68), remove the crankshaft rear oil seal. INSTALLATION (1) Position the magnetic seal guide Special Tool 8349–2 (Fig. 69) onto the crankshaft rear face. Then (2) Using Special Tools 8349 Crankshaft Rear Oil Seal Installer and C-4171 Driver Handle (Fig. 70), (3) Install the flexplate. Fig. 68 Crankshaft Rear Oil Seal Removal 1 - REAR CRANKSHAFT SEAL 9 - 172 ENGINE 4.7L AN |