Crankshaft and Bearings Installation

WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Apply engine oil to the crankshaft bearing inserts.
Install the upper crankshaft bearing inserts.
Important: The number 3 crankshaft bearing insert is specific to the number three crankshaft journal.
The number 3 crankshaft bearing insert does not have a groove.
Install the crankshaft.

Fig 1: Installing Upper Crankshaft Bearing Inserts
Courtesy of GENERAL MOTORS CORP.
Install the lower crankshaft bearing inserts to the crankshaft bearing caps.
- Make sure that the inserts are the correct size.
- Measure the crankshaft bearing clearance. Refer to ENGINE MECHANICAL SPECIFICATIONS .
- Apply engine oil to the inserts.
  
  Fig 2: Installing Lower Crankshaft Bearing Inserts To Crankshaft Bearing Caps
  Courtesy of GENERAL MOTORS CORP.
Install the crankshaft bearing caps to the engine block.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the crankshaft bearing cap bolts to the engine block.
Tighten

Tighten the crankshaft bearing cap bolts first to 50 N.m (37 lb ft).

Fig 3: Installing Crankshaft Bearing Cap Bolts To Engine Block
Courtesy of GENERAL MOTORS CORP.
Before installing the rear crankshaft bearing cap, coat the face of the block where it mates to the cap with sealer GM P/N United States 1052942, GM P/N Canada 10953466.

Fig 4: Coating Face Of Block With Sealer
Courtesy of GENERAL MOTORS CORP.
Measure the crankshaft end play using the following procedure:
1. 9.1. Firmly thrust the crankshaft rearward.
2. 9.2. Firmly thrust the crankshaft forward.
3. 9.3. This will align the crankshaft bearing and the crankshaft thrust surfaces.
  Tighten
  
  Tighten the crankshaft bearing cap bolts to 95 N.m (70 lb ft).
  
  Fig 5: Measuring Crankshaft End Play
  Courtesy of GENERAL MOTORS CORP.
Measure the crankshaft end play at the front end of the rear crankshaft bearing with a feeler gauge.
- The crankshaft should still be wedged forward.
- The proper clearance is 0.0511-0.1780 mm (0.002-0.007 in).
  
  Fig 6: Measuring Crankshaft End Play At Front End Of Rear Crankshaft Bearing
  Courtesy of GENERAL MOTORS CORP.