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
| • | All fasteners and threaded holes on the LS1 engine utilize metric threads. |
| • | All M11 cylinder head bolts are the same length and have a common torque/angle
tightening strategy. |
Changed Engine Specifications
Piston pin specifications have been revised.
New Sealants and/or Adhesives
Canadian SPO Part Numbers have been added.
Disassembly and Assembly Procedure Revisions
| • | The piston and pin are to be serviced as an assembly. |
| • | All applications use a full-floating piston pin design. |
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.
New Special Tools Required
A variety of new tools have been developed to assist in engine disassembly,
assembly and on-vehicle service.
A Component Comparison from the Previous Year
| • | The cable operated throttle body has been replaced by a drive-by-wire
assembly. |
| • | All M11 cylinder head bolts are the same length. |
| • | The positive crankcase ventilation (PCV) system has been relocated
to the engine valley area. The PCV valve is now a fixed orifice within the valley
cover assembly. |
| • | All applications use full-floating design piston pins. |
