Engine Front Cover Installation

Tools Required

• J 41476  Front and Rear Cover Alignment Tool. See Special Tools .
• J 41480  Front and Rear Cover Alignment. See Special Tools .

IMPORTANT:
• Do not use the crankshaft oil seal or the engine front cover gasket again.
• Do not apply any type 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.
Fig 1: View Of Front Cover & Gasket
Courtesy of GENERAL MOTORS CORP.
1. Install the front cover gasket, cover, and bolts onto the engine.
2. Tighten the cover bolts finger tight. Do not overtighten.
NOTE: Refer to Fastener Notice .
IMPORTANT: Start the tool-to-front cover bolts. Do not tighten the bolts at this time.
Fig 2: View Of J 41480 Installed On Engine Block
Courtesy of GENERAL MOTORS CORP.
3. Install the J 41480  . See Special Tools .

   Tighten:  Tighten the tool-to-engine block bolts to 25 N.m (18 lb ft).

IMPORTANT: Align the tapered legs of the tool with the machined alignment surfaces on the front cover.
Fig 3: View Of J 41476 & J 41480 Installed On Engine
Courtesy of GENERAL MOTORS CORP.
4. Install the J 41476  . See Special Tools .
5. Install the crankshaft balancer bolt.

   Tighten: 

   1. Tighten the crankshaft balancer bolt by hand until snug. Do not overtighten.
   2. Tighten the J 41480  . See Special Tools .
   3. Tighten the engine front cover bolts to 25 N.m (18 lb ft).

6. Remove the tools.
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 gage between the front cover and the straight edge tool. The cover must be flush with the oil pan surface or no more than 0.5 mm (0.02 in) below flush.
   Fig 4: Identifying Proper Front Cover Installation Position

   Courtesy of GENERAL MOTORS CORP.
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.