Engine Front Cover Installation

Special Tools

• EN-48853  Front Cover Alignment Tool
• J 41480  Front and Rear Cover Alignment

For equivalent regional tools, refer to Special Tools

Fig 1: Engine Front Cover And Front Cover Gasket
Courtesy of GENERAL MOTORS CORP.
NOTE:
• Do not use the crankshaft oil seal or the engine front cover gasket again.
• Do not apply any type of sealant to the front cover gasket, unless specified.
• The special tools in this procedure are used to properly align the engine front cover at the oil pan surface and to center the crankshaft front oil seal.
  • All gasket surfaces should be free of oil or other foreign material during assembly.

    The crankshaft front oil seal MUST be centered in relation to the crankshaft.

  • The oil pan sealing surface at the front cover and engine block MUST be aligned within specifications.
  • An improperly aligned front cover may cause premature front oil seal wear and/or engine assembly oil leaks.
1. Install the front cover gasket (503), front cover (502), and bolts (501).
2. Tighten the cover bolts finger tight. Do not overtighten.
Fig 2: Front And Rear Cover Alignment Tool
Courtesy of GENERAL MOTORS CORP.
CAUTION:

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.

NOTE:

Start the tool-to-front cover bolts. Do not tighten the bolts at this time.

3. Install the J 41480  alignment. Tighten the tool-to-engine block bolts to 25 N.m (18 lb ft).
Fig 3: Front Cover Alignment Tool
Courtesy of GENERAL MOTORS CORP.
NOTE:

Align the tapered legs of the tool with the machined alignment surfaces on the front cover.

4. Install the EN-48853  tool (1).
5. Install the crankshaft balancer bolt.
   • Tighten the crankshaft balancer bolt by hand until snug. Do not overtighten.
   • Tighten the J 41480  alignment (2).
   • Tighten the engine front cover bolts to 25 N.m (18 lb ft).
6. Remove the tools.
Fig 4: Measuring Oil Pan Surface Flatness
Courtesy of GENERAL MOTORS CORP.
7. Measure the oil pan surface flatness, front cover-to-engine block.
   1. Place a straight edge across the engine block and front cover oil pan sealing surfaces.

      Avoid contact with the portion of the gasket that protrudes into the oil pan surface.

   2. Insert a feeler gauge between the front cover and the straight edge tool. The cover must be flush with the oil pan surface or no greater than 0.3 mm (0.0118 in) (a) below flush.
8. If the front cover-to-engine block oil pan surface alignment is not within specifications, repeat the cover alignment procedure.
9. If the correct front cover-to-engine block alignment cannot be obtained, replace the front cover.
Fig 5: CMP Actuator Magnet, Bolts, Gasket And Oil Seal
Courtesy of GENERAL MOTORS CORP.
10. Install the camshaft position (CMP) actuator magnet (752), gasket (753), and bolts (751). Tighten the bolts to 12 N.m (106 lb in).
Fig 6: CMP Sensor And O-Ring
Courtesy of GENERAL MOTORS CORP.
11. Install the CMP sensor (703) and O-ring (704).
Fig 7: CMP Sensor Wire Harness And Bolts
Courtesy of GENERAL MOTORS CORP.
12. Install the CMP sensor wire harness (737) and bolts (738). Tighten the bolts to 12 N.m (106 lb in).