Crankshaft and Bearing Removal

Tools Required

• J 6125-1B  Slide Hammer. See Special Tools .
• J 41348  Main Bearing Cap Puller. See Special Tools .

Fig 1: View Of Crankshaft, Bearings And Bearing Caps
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: This engine has side bolts on all of the main caps except the rear cap. These bolts must be removed to service the caps.
1. Remove the crankshaft main bearing cap side bolts.
2. Remove the crankshaft main bearing cap bolts.
Fig 2: Removing Main Bearing Caps
Courtesy of GENERAL MOTORS CORP.
NOTE: Main bearing caps are press fit. Remove the caps carefully for service. J 41348 has been designed to work with J 6125-B in order to prevent damage to the bearing and cap. J 41348 MUST be installed properly into the bolt holes of the caps and J 6125-B attached to J 41348 in order to properly remove the main cap without damaging the bearing or the cap. Any deviation from this procedure may cause damage to the cap and the bearing and may result in future engine damage.
NOTE: Refer to FASTENER NOTICE .
3. Install J 41348  into the crankshaft main bearing cap bolt holes. See Special Tools .

   Tighten:  Tighten the bolts on J 41348  to 12 N. See Special Tools .m (100 lb in).

4. Install J 6125-1B  to J 41348  . See Special Tools .
5. Use J 6125-1B  to remove the crankshaft main lower bearing caps. See Special Tools .
Fig 3: View Of Crankshaft, Bearings And Bearing Caps
Courtesy of GENERAL MOTORS CORP.
6. Remove the crankshaft.
7. Remove the upper main bearings from the engine block.