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 LS2 engine utilize metric threads. |
| • | Cylinder head, connecting rod, crankshaft balancer, and main bearing cap bolts now apply a torque angle tightening strategy. |
| • | 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. |
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
| • | The piston and piston pin are to be serviced as an assembly. |
| • | A crankshaft balancer washer has been added to later design 2005 model year production engines. The washer installs onto the front of the crankshaft and is positioned between the balancer and crankshaft sprocket. When servicing earlier design engines,
install the balancer washer as indicated in the service procedure. Refer to
Crankshaft Balancer 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 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 special tools have been designed for this application.
A Component Comparison from the Previous Year
| • | The 6.0 liter LS2 engine replaces the 5.7 liter LS6. |
| • | The camshaft position (CMP) sensor has been relocated to the front of the engine using the front surface of the camshaft sprocket as the target wheel. |
| • | The knock sensors have been relocated to the sides of the engine block and are flat-response type sensors. |
