Edited: 8/8/2009 9:36:32 AM by slmmdd97
the 4.3 is the vortec v6, i think u mean 5.3 which came starting in and around 99-00 chevy. this motor is the change over from the 350 5.7 L, the 4.8 motor is the change over from the 5.0 L. It has a little smaller displacement but I think it is the same size as the 350. hope this hlps out. I did a quick search this may you out. I hve nvr heard of chevy making a 4.3 v8 I could be wrong.Silverado - SpecsGet a price quote on a 2004 Chevy SilveradoCompare free price quotes from the leading online services. Fill out a no obligation price quote from the following online car buying
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Dimensions and capacities are in inches unless otherwise specified.
Powertrain / ChassisVortec 43004.3L V-6 (LU3) Vortec 48004.8L V-8 (LR4) Vortec 53005.3L V-8 (LM7) Vortec 60006.0L V-8 (LQ4) Type4.3L V-64.8L V-85.3L V-86.0L V-8Displacement (cu in / cc)262 / 4293294 / 4807327 / 5328364 / 5967Bore & stroke (in / mm)4 x 3.48 / 101.6 x 88.43.78 x 3.27 / 96 x 833.78 x 3.62 / 96 x 924 x 3.62 / 101.6 x 92Block materialcast ironcast ironcast ironcast ironCylinder head materialcast ironcast aluminumcast aluminumcast aluminumValvetrainOHVOHVOHVOHVIgnition systemdirect composite distributor, platinum-tipped spark plugs, low-resistance spark plug wirescoil-near-plug, platinum-tipped spark plugs, low-resistance spark plug wirescoil-near-plug, platinum-tipped spark plugs, low-resistance spark plug wirescoil-near-plug, platinum-tipped spark plugs, low-resistance spark plug wiresFuel deliverysequential fuel injectionsequential fuel injectionsequential fuel injectionsequential fuel injectionCompression ratio9.2:19.5:19.5:19.4:1Horsepower (hp / kw @ rpm)200 / 149 @ 4600285 / 212 @ 5200295 / 220 @ 5200325 / 242 @ 4400Torque (lb-ft / Nm @ rpm)260 / 353 @ 2800295 / 400 @ 4000330 / 447 @ 4000365 / 495 @ 4000Recommended fuel87 octane87 octane87 octane87 octaneMaximum engine speed (rpm) Manual5600560056005600Maximum engine speed (rpm) Automatic5600590059005600Emissions controls3-way catalytic converter, exhaust gas recirculation, positive crankcase ventilation, evaporative collection system3-way catalytic converter, exhaust gas recirculation, positive crankcase ventilation, evaporative collection system3-way catalytic converter, exhaust gas recirculation, positive crankcase ventilation, evaporative collection system3-way catalytic converter, exhaust gas recirculation, positive crankcase ventilation, evaporative collection system