For 1990-2009 cars

#### Tools Required

J 36660-A Torque Angle Meter

1. Install the crankshaft.

Notice: In order to prevent the possibility of cylinder block or crankshaft bearing cap damage, the crankshaft bearing caps are tapped into the cylinder block cavity using a brass, lead, or a leather mallet before the attaching bolts are installed. Do not use attaching bolts to pull the crankshaft bearing caps into the seats. Failure to use this process may damage a cylinder block or a bearing cap.

2. Install the main bearing caps. Use GM approved sealer at the Number 4 main bearing cap to the block surface.

Notice: This bolt is designed to permanently stretch when tightened, and therefore MUST be replaced anytime it is removed. The correct part number fastener must be used to replace this type of fastener. Do not use a bolt that is stronger in this application. If the correct bolt is not used, the parts will not be tightened correctly. The system or the components may be damaged.

3. Install the main bearing cap bolts. Start the main bolts by hand. Ensure that the bottom of the cap is parallel to the bottom of the channel.

Tighten

• | Tighten all of the caps in equal increments. Do not tighten one cap completely at a time.

• | Tighten the bolts to 70 N·m (52 lb ft) in order to fully seat the caps. Loosen the bolts 360 degrees counterclockwise.

• | Tighten the bolts to 20 N·m (15 lb ft), then 40 N·m (30 lb ft).

• | Use the J 36660-A in order to tighten the bolts in steps: 35 degrees+35 degrees+40 degrees for a total of 110 degrees.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the side main bolts.

Tighten
Tighten the side main bolts to 15 N·m (11 lb ft). Use the J 36660-A in order to tighten the bolts an additional 45 degrees.

5. Install the connecting rod bearing inserts. Refer to Piston, Connecting Rod, and Bearing Installation .
6. Install the connecting rod cap bolts.

Tighten
Tighten the connecting rod cap bolts to 27 N·m (20 lb ft). Use the J 36660-A in order to tighten the bolts an additional 50 degrees.