New Product Information

New Product Information

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

Torque Values and/or Fastener Tightening Strategies

* All fasteners and threaded holes on the L66 engine utilize metric threads.
* A second design cylinder head bolt with a torque/angle tightening strategy has been developed with usage beginning in 2006 model year. Refer to Cylinder Head Installation - Left Side or Cylinder Head Installation - Right Side.

New Sealants and/or Adhesives

Sealers and adhesives, as required, are identified within the specific service procedures. Refer to Sealers, Adhesives, and Lubricants.

Engine Mechanical Diagnostic Procedure Revisions

All 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. Initial Inspection and Diagnostic Overview

A Component Comparison from the Previous Year

* A second design cylinder head bolt with a torque/angle tightening strategy has been developed with usage beginning in 2006 model year. Refer to Cylinder Head Installation - Left Side or Cylinder Head Installation - Right Side.
* A second design timing belt drive sprocket and powertrain control module (PCM) have been developed with usage beginning in 2006 model year. Refer to Timing Belt Drive Sprocket Installation.
* A second design valve stem key and valve spring cap have been developed with usage beginning later in 2006 model year. Refer to Cylinder Head Assemble.
* A second engine coolant temperature (ECT) sensor has been added to the engine and is located in the thermostat housing.