GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Corvette 🢒 Engine 🢒 Engine Controls - 5.7L 🢒 New Product Information

New Product Information F Car

The purpose of New Product Information is to highlight or indicate important product changes from the previous model year.

Changes may include one or more of the following items:

    • Torque values and/or fastener tightening strategies
    • Changed engine specifications
    • New sealants and/or adhesives
    • Disassembly and assembly procedure revisions
    • Engine mechanical diagnostic procedure revisions
    • New special tools required
    • A component comparison from the previous year

Torque Values and/or Fastener Tightening Strategies
    • The new service thread repair tools and service procedures are identified.
        Refer to Thread Repair , Thread Repair Specifications , and Fastener Tightening Specifications for additional information.
    • A second design connecting rod bolt may be used. The proper fastener tightening value MUST be used with the correct bolt.
        Refer to Piston, Connecting Rod, and Bearing Installation .

New Sealants and/or Adhesives

No sealant or adhesive changes from the previous year. Refer to Sealers, Adhesives, and Lubricants .

Disassembly and Assembly Procedure Revisions
    • The piston, pin, and connecting rod are to be serviced as an assembly.
    • Newer design pistons have a graphite coated piston skirt. The coated skirt outside diameter (OD) may be slightly larger than the cylinder bore inside diameter (ID) and the piston assembly may have a slight interference fit to the cylinder bore during initial installation.

Engine Mechanical Diagnostic Procedure Revisions

All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system problem. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis in General Information or Diagnostic Starting Point - Engine Mechanical in Engine Mechanical.

New Special Tools Required
    • The proper thread repair procedures for aluminum cylinder blocks and cylinder heads have been added.
    • J 42078 is not required for installation of the second design seal and shim assembly.
    • Refer to Thread Repair .

A Component Comparison from the Previous Year
    • The engine coolant air bleed system has been changed to a two point system with the coolant air bleed pipe mounted to the front top area of both cylinder heads.
    • Valve lift specifications are changed. Refer to Engine Mechanical Specifications .
    • The exhaust gas recirculation (EGR) system has been deleted.
    • Crankshaft main bearing clearances are reduced.
    • A second design valve stem oil seal and shim assembly may be used on later engines.

New Product Information Y Car

The purpose of New Product Information is to highlight or indicate important product changes from the previous model year.

Changes may include one or more of the following items:

    • Torque values and/or fastener tightening strategies
    • Changed engine specifications
    • New sealants and/or adhesives
    • Disassembly and assembly procedure revisions
    • Engine mechanical diagnostic procedure revisions
    • New special tools required
    • A component comparison from the previous year

Torque Values and/or Fastener Tightening Strategies
    • Certain fasteners should not be reused. Bolts, studs, or other fasteners that must be replaced will be called out in the specific service procedure. Refer to Thread Repair , Thread Repair Specifications , or Fastener Tightening Specifications .
    • A second design connecting rod bolt may be used. The proper fastener tightening valve MUST be used with the correct bolt.
        Refer to Piston, Connecting Rod, and Bearing Installation .

New Special Tools Required

J 42078 is not required for installation of the second design seal and shim assembly.

Changed Engine Specifications
    • Both the LS1 and LS6 applications have a new design camshaft.
    • The LS6 has a new design valve spring.
    • Refer to Engine Mechanical Specifications .

New Sealants and/or Adhesives

No sealant or adhesive changes from the previous year. Refer to Sealers, Adhesives, and Lubricants .

Disassembly and Assembly Procedure Revisions
    • The piston, pin, and connecting rod are to be serviced as an assembly.
    • Newer design pistons have a graphite coated piston skirt. The coated skirt outside diameter (OD) may be slightly larger than the cylinder bore inside diameter (ID) and the piston assembly may have a slight interference fit to the cylinder bore during initial installation.

Engine Mechanical Diagnostic Procedure Revisions

All diagnosis on a vehicle should follow a logical process. Strategy Based Diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system problem. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis in General Information or Diagnostic Starting Point - Engine Mechanical in Engine Mechanical.

A Component Comparison from the Previous Year
    • The 5.7 L now uses cast iron exhaust manifolds with bolt on heat shields.
    • Both the LS1 and LS6 have new design camshafts. Valve lift specifications have changed.
    • The LS6 has unique cast aluminum cylinder heads.
    • The LS6 has a unique valve spring with a copper plated spring shim (first design).
    • A second design valve stem oil seal and shim assembly may be used on later engines.
    • The LS6 has a unique design valley cover/PCV valve and hose/ventilation system.
    • Crankshaft main bearing clearances are reduced.