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 LH6 engines 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. |
| • | Some applications may use a second design camshaft retainer plate and bolts. Refer to
Camshaft Installation. |
| • | 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
Disassembly and Assembly Procedure Revisions
The timing chain and sprocket installation procedure has been revised. Refer to
Timing Chain and Sprockets 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
| • | Timing belt tensioner retaining pin
EN 46330 is used to retain the timing chain tensioner during the chain and sprocket installation procedure. |
| • | Oil pressure gage adapter
EN-47971 is required for oil pressure testing. The new design oil filter with internal bypass valve has a larger diameter oil filter fitting. |
A Component Comparison from the Previous Year
| • | The camshaft sprocket is now retained to the front of the camshaft using a single bolt design with a torque and angle tightening strategy. |
| • | A new design timing chain tensioner replaces the timing chain dampener. |
| • | The oil filter bypass valve is now internal to the new design oil filter. |
