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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (Engine Mechanical - 3.7L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Crankshaft and Bearings Removal

Crankshaft and Bearings Removal

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Torque To Yield (TTY) bolts used on cylinder head and main bearing cap bolts may bend or break during removal. Interaction between TTY bolt and threads may cause bolt to bend or break during removal. To minimize this problem, prior to removing TTY bolts, perform the follwoing:
  • Using an appropriate size punch and hammer, rap head of each bolt. Vibration produced by this procedure will assist in a successful removal.
  • If a bolt breaks during disassembly, a broken bolt Extractor Kit (EN-47702) has been released to assist in removal of remaining bolt segment. Many times the remaining bolt fragment will back out easily with a pick tool or reverse twist drill bit. NEVER reuse TTY bolts. Always make sure block threaded holes are clean and DO NOT place oil or threadlock on NEW bolts. See GM TSB 05-06-01-026B ON TORQUE TO YIELD BOLT BREAKAGE .

Tools Required

    Fig 1: View Of Crankshaft Main Bearing Cap Bolt
    GM858191Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Rap on the head of each bolt using an appropriate size punch and hammer. The vibration produced by this procedure assists in successful removal. If a bolt breaks during engine disassembly, a broken bolt extractor kitEN-47702  is available to assist in removal of the remaining bolt segment.
  1. Remove and discard the crankshaft main bearing cap bolts.
    2. Fig 2: View Of Crankshaft Main Bearing Cap Stiffener
    GM858192Courtesy of GENERAL MOTORS CORP.
  2. Remove the crankshaft main bearing cap stiffener.
    3. Fig 3: View Of Crankshaft Main Bearing Caps & Lower Bearings
    GM858193Courtesy of GENERAL MOTORS CORP.
  3. Use EN-48268  and J 6125-1B  to remove the crankshaft main bearing caps.
  4. Remove the lower crankshaft main bearing halves.
    5. Fig 4: View Of Crankshaft
    GM858194Courtesy of GENERAL MOTORS CORP.
  5. Remove the crankshaft.
    6. Fig 5: View Of Upper Crankshaft Main Bearing Halves
    GM858195Courtesy of GENERAL MOTORS CORP.
  6. Remove the upper crankshaft main bearing halves.
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