Fastener Tightening Specifications - Main Bearing Cap

^ Tools Required
- J 36660 Torque Angle Meter





1. Dip the crankshaft bearing cap bolts in clean engine oil.

Notice: Do not scrape, shim, or file bearing inserts. If the bearing surface of the insert is touched with bare fingers, the skin oil and acids will etch the bearing surface.

Important: Ensure that the crankshaft bearing cap bolt holes and the crankshaft bearing cap mating surfaces are clean and dry.

2. Place the crankshaft bearing inserts into the crankshaft bearing cap and into the engine block.

Notice: Upper and lower inserts may be different. Do not obstruct any oil passages.

3. Coat the crankshaft main thrust bearing surface with GM ECS P/N 1052368 or the equivalent.

Important: The crankshaft bearing inserts will project slightly when put into place. Ensure that the bearing inserts project an equal distance on both sides. Ensure that the insert tangs are engaged.

4. Lubricate the crankshaft main bearing surface with clean engine oil.
5. Install the crankshaft.
6. Install the crankshaft main bearing caps. Apply a small amount of sealer GM P/N 1052942 to the rear of the #4 crankshaft main bearing cap sealing surface.

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.

7. Install the crankshaft main bearing cap bolts.
^ Use the J 36660 in order to tighten the crankshaft main bearing cap bolts to 50 Nm (37 lb ft) plus 77 degrees.

Notice: Refer to Fastener Notice in Service Precautions.

8. Measure the crankshaft end play.