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 |
Changed Engine Specifications
| • | Specifications have been added for the Active Fuel Management (AFM) oil pressure relief valve. |
Torque Values and/or Fastener Tightening Strategies
| • | All fasteners and threaded holes on the LFA engine utilize metric threads. |
| • | Cylinder head, connecting rod, crankshaft balancer, camshaft position actuator valve, and main bearing cap bolts now apply a torque and 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. |
| • | A new design crankshaft balancer bolt is used with a four pass tightening process. |
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
Engine oil pan disassembly now includes servicing of the AFM oil pressure relief valve. Refer to
Oil Pan Cleaning and Inspection.
Engine Mechanical Diagnostic Procedure Revisions
| • | 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. |
| • | A diagnostic procedure has been added for testing the AFM oil pressure relief valve. |
New Special Tools Required
No new service tools are required.
A Component Comparison from the Previous Year
| • | A rivet-type plug replaces 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. |
| • | A new design crankshaft balancer bolt is used with a four pass tightening process. |
| • | The oil pan assembly now includes the AFM oil pressure relief valve. |
