New Product Information

The purpose of New Product Information is to highlight important technical 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
^ Cylinder head bolts are tightened in four passes.
^ Upper intake manifold bolts are tightened in two passes.
Refer to Specifications

CHANGED ENGINE SPECIFICATIONS
^ Crankshaft connecting rod diameter has changed slightly.
^ Piston pin diameter specification was changed slightly. Refer to Specifications

DISASSEMBLY AND ASSEMBLY PROCEDURE REVISIONS
^ Engine front cover removal procedure has been revised,
^ Reluctor ring removal procedure has been revised. Refer to Timing Chain and Sprockets Removal.
^ Install a NEW oil pump driveshaft retainer whenever removing or installing an oil pump assembly.
^ Oil bypass valve removal and installation procedure has been revised.
^ Upper intake manifold bolt tightening sequence revised.

ENGINE MECHANICAL DIAGNOSTIC PROCEDURE REVISIONS
A new engine mechanical Base Engine Misfire chart has been added. Refer to Base Engine Misfire Diagnosis.

NEW SPECIAL TOOLS REQUIRED
^ The valve lifter remover pliers J 3049-A replaces J 9290-01.
^ Spark plug port adapter J 23590 has been replaced by J 22794.
^ The crankshaft balancer remover/installer J 39046 has been replaced by J 23523-F
^ Refer to Special Tools.