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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Engine Mechanical - 3.8L) >> Repair Instructions - Off Vehicle >> Piston, Connecting Rod, and Bearing Removal >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Cylinder Bore Ring Ridge
    GM11497Courtesy of GENERAL MOTORS CORP.
  1. Mark the connecting rod cap and the connecting rod for proper installation.
    2. NOTE: If there is a pronounced ridge at the top of the piston travel, the ridge must be removed with a ridge reamer before the piston and connecting rod assembly are removed. Applying force may break the piston rings or damage the piston.
  2. Use the J 24270  to remove the cylinder bore ring ridge. See Special Tools .
    1. Turn the crankshaft until the piston is at the bottom of the stroke.
    2. Cover the piston with a cloth.
    3. Remove the cylinder ring ridge.
    4. Turn the crankshaft until the piston is at the top of the stroke.
    5. Remove the cloth.
    6. Remove the metal shavings from the cylinder and piston.
    3. Fig 2: Identifying Connecting Rod Bolts & Cap
    GM38153Courtesy of GENERAL MOTORS CORP.
  3. Remove the connecting rod bolts.
  4. Remove the connecting rod cap.
    5. Fig 3: Locating J 41507 To Connecting Rod
    GM38180Courtesy of GENERAL MOTORS CORP.
  5. Install J 41507  to the connecting rod. See Special Tools . Hand tighten the tool to the connecting rod.
  6. Use hand pressure on J 41507  to push the connecting rod towards the top of the cylinder. See Special Tools .
    7. IMPORTANT: Mark the piston with the number of the cylinder from which it was removed. Mark the piston as to what is the front for proper reassembly.
  7. Remove the piston, the connecting rod, and the connecting rod bearings.
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