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The intake manifold is a two-piece design. The upper portion is made from a composite material Piston and Connecting Rod Assemblies The cast aluminum pistons use two compression rings and one oil control assembly. The piston is Valve Train Motion is transmitted from the camshaft through the hydraulic roller valve lifters and the tubular NEW PRODUCT INFORMATION The purpose of New Product Information is to highlight or indicate important product changes Changes may include one or more of the following items: A component comparison from the previous year Fastener changes
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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 Component Comparison Powdered metal connecting rods have replaced forged connecting rods. Torque Values and/or Fastener Tightening Strategies Addition of powdered metal connecting rod torque specification. Changed Engine Specifications No changes for 2007. New Sealants and/or Adhesives No new sealants or adhesives for 2007. Disassembly and Assembly Procedure Revisions Instructions added specific to powdered metal connecting rod service. Engine Mechanical Diagnostic Procedure Revisions No changes for 2007. New Special Tools Required No changes for 2007. LUBRICATION DESCRIPTION
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Fig. 731: Engine Lubrication Full pressure lubrication, through a full-flow oil filter is supplied by a gear-type oil pump. Oil is
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
arms. Oil drains back to the crankcase through the oil drain holes in the cylinder head. The CLEANLINESS AND CARE Throughout this section, it should be understood that proper cleaning and protection of When any internal engine parts are serviced, care and cleanliness is important. When components are removed for service, the components should be marked, organized or At the time of installation, the components should be installed in the same location and with An automobile engine is a combination of many machined, honed, polished and lapped Apply a liberal amount of clean engine oil to friction areas during assembly. Proper lubrication will protect and lubricate friction areas during initial operation. SEPARATING PARTS Mark or identify the following components: Piston and the piston pin Piston to the specific cylinder bore Piston rings to the specific cylinder bore Connecting rod to the crankshaft journal Connecting rod to connecting rod cap Crankshaft bearings and connecting rod bearings Engine camshaft and valve lifters IMPORTANT: Many internal engine components will develop specific wear patterns on their friction surfaces.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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