LS7 Corvette Mechanical Repair Specs (PDF) - Bakes Online

Print Preview Version 8.0 PubTeX output 2006.06.15:1036 File: C:\DOCUME~1\PCOMPO~1.IGS\LOCALS~1\Temp\.aptcache\2006LS7/tfa01804.dvi User: PComposer Page: 332006 Y Car GMX245 Corvette7.0L (LS7) Engine MechanicalUpper Engine Noise, Regardless of Engine SpeedUpper Engine Noise, Regardless of Engine Speed:Engine Mechanical - 4.8L, 5.3L, and 6.0L@Engine Noise:Upper EngineNoise, Regardless of Engine Speed:Engine Mechanical - 4.8L, 5.3L, 6.0LCauseCorrectionLow oil pressure 1. Perform an oil pressure test. Refer to Oil PressureDiagnosis and Testing .2. Repair or replace, as required.Loose and/or worn valve rocker arm attachments 1. Inspect the valve rocker arms and retaining bolts.2. Repair or replace, as required.Worn or damaged valve rocker arm 1. Inspect the rocker arm for wear or missing needlebearings2. Replace the valve rocker arms, as required.Bent or damaged valve push rodInspect the following components and replace, as required:• The valve rocker arm• The valve push rod• The valve lifter• The valve lifter guide• The pistonInspect the top of the pistons for valve contact. If the top ofthe piston shows valve contact, replace the piston and pinassembly.Improper lubrication to the valve rocker armsInspect the following components and repair or replace, asrequired:• A restricted oil filter• The oil pump for a sticking relief valve causing low oilpressure• The crankshaft and connecting rod bearings forexcessive wearBroken valve springWorn or dirty valve liftersStretched or broken timing chain and/or damaged sprocketteethReplacethevalvespringandspringshim.Replace the valve lifters.Replace the timing chain and sprockets.Worn engine camshaft lobes 1. Inspect the engine camshaft lobes.2. Replace the camshaft and valve lifters, as required.Worn valve guides or valve stemsInspect the following components and repair, as required:Stuck valvesCarbon on the valve stem or valve seat may cause the valveto stay open.Diagnostic Information and Procedures1555019• The valves• The valve guidesInspect the following components and repair, as required:• The valves• The valve guides33 of 272