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Home >> Oldsmobile >> 1975 >> Toronado Custom >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 260" BUICK, OLDSMOBILE & PONTIAC 350" & 455" OLDSMOBILE Exc. Omega >> Rear Main Bearing Oil Seal >> Removal & Installation

Removal & Installation

  1. Drain crankcase, remove oil pan and rear bearing cap. Using suitable tool (BT-6433 or J-25286-2), drive both ends of oil seal into bearing groove in cylinder block until groove is packed tight. Measure amount seal was driven up into block, add 1/16", then cut this length from the old seal in bearing cap (remove bearing cap seal with razor blade). Repeat procedure on other side of block.
  2. Place a drop of suitable sealer on end of seal piece and work two pieces of seal (cut from old cap seal) into cylinder block grooves using two small screwdrivers. Drive into place using suitable tool (BT-6433 or J-25286-2). Trim seal flush with block, using suitable tool (BT-6436).
  3. Install lower seal in bearing cap using suitable seal installer (BT-6408-1 on 350" or BT-23-18 on 455"). Rotate tool slightly and cut off each end of seal flush with cap. Install suitable sealer on cap and install cap to engine. Tighten rear main bearing cap bolts.
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