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. |
Changed Engine Specifications
• | Crankshaft connecting rod diameter has changed slightly. |
• | Piston pin diameter specification was changed slightly. |
Disassembly and Assembly Procedure Revisions
• | Engine front cover removal procedure has been revised. |
• | Reluctor ring removal procedure has been revised. |
• | 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 crankshaft balancer remover/installer J 39046
has been replaced by J 23523-F
. |
Refer to
Special Tools
.