New Product Information 6.2L
The purpose of New Product Information is to highlight, or indicate, important product changes from the previous model year.
Changes may include 1 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
| • | All fasteners and threaded holes on the LS3 engine utilize metric threads. |
| • | Certain fasteners should not be used again. Bolts, studs, or other fasteners that must be replaced, will be called out in the specific service procedure. |
| • | A second design camshaft retainer and bolts are optional. |
| • | The camshaft sprocket is now retained to the front of the camshaft using a single bolt design with a torque and angle tightening strategy. |
New Sealants and/or Adhesives
Sealers and adhesives, as required, are identified within the specific service procedures. Refer to
Adhesives, Fluids, Lubricants, and Sealers
.
Disassembly and Assembly Procedure Revisions
No new disassembly or assembly procedure revisions.
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 condition. The diagnostic flow is the place to start
when repairs are necessary. For a detailed explanation, refer to
Diagnostic Starting Point - Engine Mechanical
.
New Special Tools Required
No new tools are required for LS3 service.
A Component Comparison from the Previous Year
| • | The 6.0L RPO LS2 engine has been replaced by the 6.2L RPO LS3. |
| • | The new design intake manifold has non-serviceable cap with acoustic foam added to the top of the manifold to reduce engine noise. |
| • | The cylinder heads are redesigned for improved flow. |
| • | The intake valve rocker arms are off-set 6 mm (0.24 in). |
| • | Second design engines will use a rivet-type plug replacing the coolant air bleed covers located at the top rear of each cylinder head. To properly repair a leaking plug, remove cylinder head from the engine, remove the plug from the cylinder head
and install first design coolant air bleed cover and bolt. |
New Product Information 7.0L
The purpose of New Product Information is to highlight, or indicate, important product changes from the previous model year.
Changes may include 1 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
| • | All fasteners and threaded holes on the 7.0 liter engine utilize metric threads. |
New Sealants and/or Adhesives
No new sealants, cleaning chemicals, or adhesives. Refer to
Adhesives, Fluids, Lubricants, and Sealers
.
Changed Engine Specifications
No revisions to the engine mechanical specifications. Refer to
Engine Mechanical Specifications
.
Disassembly and Assembly Procedure Revisions
No revised disassembly or assembly procedures.
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 condition. The diagnostic flow is the place to start
when repairs are necessary. For a detailed explanation, refer to
Strategy Based Diagnosis
or
Diagnostic Starting Point - Engine Mechanical
.
New Special Tools Required
No new special tools required. Refer to
Special Tools
.
A Component Comparison from the Previous Year
Second design engines will use a rivet-type plug replacing the coolant air bleed covers located at the top rear of each cylinder head. To properly repair a leaking plug, remove cylinder head from the engine, remove the plug from the cylinder head and install
first design coolant air bleed cover and bolt.
