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
A variety of specifications have been revised based on the new design LFA engine. Refer to
Engine Mechanical Specifications.
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. |
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
A variety of procedures have been revised based on the new design LFA engine.
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.
New Special Tools Required
| • | Timing belt tensioner retaining pin
EN 46330
is used to retain the timing chain tensioner during the installation procedure. |
| • | Front cover alignment tool
EN-48853
is required for the LFA application. The front cover design has changed as the alignment tabs on the cover are relocated farther apart to accommodate for the
usage of the new design variable-displacement oil pump. The alignment tool is designed to properly align and position a front cover with the 159 mm (6.26 in) distance alignment tabs. |
A Component Comparison from the Previous Year
Second design engines will use a rivet-type plug replacing 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.
