New Product Information

Engine Mechanical - 5.3L L84 or 6.2L L87 | Description and Operation | Document ID: 5033944 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 Changed Engine Specifications A variety of specifications have been revised based on the new design L84 and L87 engines. Engine Mechanical Specifications. Torque Values and/or Fastener Tightening Strategies All fasteners and threaded holes on the L84 and L87 engines utilize metric threads. Cylinder head, connecting rod, crankshaft balancer, camshaft sprocket, and main bearing cap bolts still apply a torque and angle tightening strategy. Certain fasteners should not be used again. Bolts, studs, or other fasteners that must be replaced, will be called out in the specific service procedure. New Sealants and/or Adhesives Sealers and adhesives, as required, are identified within the specific service procedures. Adhesives, Fluids, Lubricants, and Sealers. Disassembly and Assembly Procedure Revisions A variety of procedures have been revised based on the new design L84 and L87 engines. Engine Mechanical Diagnostic Procedure Revisions 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 - Vehicle. New Special Tools Required A variety of new special tools are required for the new design L84 and L87 engines. Special Tools. A Component Comparison from the Previous Year The 5.3L L83 VIN C engine isreplaced by the 5.3L L84 VIN D Gen 5+ engine. Engine Component Description The 6.2L L86 VIN J Gen 5 engine is replaced by the 6.2L L87 VIN L Gen 5+ engine. Engine Component Description.