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 4.8, 5.3, and 6.0 liter engines utilize metric threads. |
| • | All M11 cylinder head bolts are the same length and have a common torque/angle tightening strategy. |
| • | Some applications may use a second design camshaft retainer plate and bolts. Refer to
Camshaft Installation
. |
Changed Engine Specifications
Piston pin specifications have been revised.
New Sealants and/or Adhesives
A new sealant has been identified for the oil pan to front cover and oil pan to rear housing sealing surfaces. Refer to
Adhesives, Fluids, Lubricants, and Sealers
.
Disassembly and Assembly Procedure Revisions
| • | For certain applications, a spacer plate has been added between the flywheel and rear of the crankshaft. It is necessary to remove the spacer plate prior to removal and installation of the crankshaft rear oil seal and clutch pilot bearing. |
| • | Applications with RPO HP2 do not have a flywheel. The crankshaft balancer MUST be removed before the engine assembly is removed from the vehicle and installed after the engine is installed. |
| • | 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 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
.
New Special Tools Required
| • | J 41479-2A
has been developed to install the rear oil seal on RPO HP2 equipped vehicles. |
| • | J 45849
has been developed to remove the pilot bushing on RPO HP2 equipped vehicles when the crankshaft is replaced. |
| • | J 45949
has been developed to install the pilot bushing on RPO HP2 equipped vehicles when the crankshaft has been replaced. |
| • | J 46093
has been developed to hold the cranktrain stationary on RPO HP2 equipped vehicles to allow for the on-vehicle removal and installation of the crankshaft balancer. |
A Component Comparison from the Previous Year
| • | All M11 cylinder head bolts are the same length. |
| • | All applications use full-floating design piston pins. |
| • | 5.3 liter RPO L33 applications have an aluminum engine block. |
| • | Some applications may use a second design camshaft retainer plate and bolts. Refer to
Camshaft Installation
. |
