For 1990-2009 cars only

Makes 🢒 Generic 🢒 2008 🢒 Unit Repair 🢒 Engine 🢒 Engine Mechanical - 6.0L 🢒 New Product Information

New Product Information for Generic Unit Repair 2008

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 L98 engines utilize metric threads.

•	Certain fasteners should not be used again. Bolts, studs, or other fasteners that must be replaced, are called out in the specific service procedure.

•	Some applications may use a second design camshaft retainer plate and bolts. Refer to Camshaft Installation .

•	The camshaft sprocket is now retained to the front of the camshaft using a single bolt design with a torque and angle tightening strategy. Refer to Timing Chain and Sprockets Installation .

New Sealants and/or Adhesives

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

•	A new sealant has been identified for the oil pan to front cover and oil pan to rear housing sealing surfaces. Refer to Adhesives, Fluids, Lubricants, and Sealers .

Disassembly and Assembly Procedure Revisions

The timing chain and sprocket installation procedure has been revised. Refer to Timing Chain and Sprockets Installation .

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 .

New Special Tools Required

•	Timing belt tensioner retaining pin EN 46330 is used to retain the timing chain tensioner during the chain and sprocket installation procedure.

•	Oil pressure gage adapter EN-47971 is required for oil pressure testing on VE applications. The new design oil filter, with internal bypass valve, has a larger diameter oil filter fitting.

A Component Comparison from the Previous Year

•	The 6.0 liter RPO L76 engine has been replaced by the 6.0 liter RPO L98 engine.

•	The 6.0 liter L98 engines do not contain the GM Active Fuel Management™ hardware.

•	The camshaft sprocket is now retained to the front of the camshaft using a single bolt design with a torque and angle tightening strategy.

•	A new design timing chain tensioner replaces the timing chain dampener.

•	For the VE applications, the oil filter bypass valve is now internal to the new design oil filter.

•	For VE applications, the oil pressure relief valve has been removed from the oil pan assembly.