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 |
| • | 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| • | Spark plug port adapter J 23590 has been replaced by J 22794.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| • | The crankshaft balancer remover/installer J 39046 has been
replaced by J 23523-F |
