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 7.0 liter engine utilize metric threads.
New Sealants and/or Adhesives
Cleaning chemicals have been identified for the titanium intake valves and connecting rods. Refer to Sealers, Adhesives, and Lubricants .
Changed Engine Specifications
Engine specifications for the LS7 application have been added. Refer to Engine Mechanical Specifications .
Disassembly and Assembly Procedure Revisions
Oil draining and filling procedures are unique for the LS7 application. Refer to Engine Oil and Oil Filter Replacement .
The piston, pin, and connecting rod are to be serviced as an assembly.
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 Strategy Based Diagnosis or Diagnostic Starting Point - Engine Mechanical .
New Special Tools Required
EN-47812 installer bolt has been developed for use with the EN-47813 front cover alignment, the J 41478 crankshaft front oil seal installer, and the J 41665 crankshaft balancer and sprocket installer. The EN-47812 installer bolt is required due to the increased length at front of crankshaft.
EN-47813 front cover alignment has been developed for alignment of the front cover. The EN-47813 is required due to the increased size of the front cover.
J-41558-10 crankshaft sprocket remover bolts have been developed for use with the J 8433 two jaw puller and the J 41816-2 crankshaft end protector for crankshaft sprocket removal. The longer bolts are required due to the increased length at front of crankshaft.
EN-47971 oil pressure gage adapter has been developed for use with the new design oil filter with internal bypass valve.
Refer to Special Tools .
A Component Comparison from the Previous Year
The 7.0 liter V8 engine (RPO LS7) is optional in place of the 6.0 liter V8 engine (RPO LS2).
The LS7 application has a dry-sump type oiling system with a remote oil tank, a hose assembly from oil tank to oil pan, and a dual rotor oil pump assembly. Refer to Engine Component Description and Lubrication Description .
The connecting rods are a titanium alloy design.
The intake valves are titanium and the exhaust valves have sodium filled valve stems.
The new design oil filter has an internal oil bypass valve in the event the oil filter becomes restricted.
A second design crankshaft balancer washer is now used. The second design washer is retained onto the rear face of the crankshaft balancer.
