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 Fastener Tightening Specifications

CHANGED ENGINE SPECIFICATIONS
- Crankshaft connecting rod diameter has changed slightly.
- Piston pin diameter specification was changed slightly.
Refer to Engine Mechanical 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 under Engine Unit Repair.
- 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 9290-1.
- Spark plug port adapter J 23590 has been replaced by J 22794.
- The crankshaft balancer remover/installer J 39046 has been replaced by J 23523-F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