Page 89 of 2009 Performance Parts by GM Parts Direct

chevy small-block v-8 balancers and pulleys balancers are relatively small parts that play a big role in how smooth an engine runs balancers are also known as torsional dampeners or harmonic balancers which is indicative of how they help control unwanted crankshaft vibrations by controlling vibrations gm performance parts balancers help engines run smoothly which also extends engine life flywheels and flexplates at the opposite end of the crankshaft from the balancer are flywheelsandflexplates,whichconnecttheenginetoeither manualflywheelsorautomaticflexplatestransmissions.gm performance parts offers both internally and externally balanced flywheelsandflexplates.itiscriticalyouusethecorrectdesignfor your engine application chevy small-block v-8 3858533 crankshaft pulley 6-5/8 not shown · two-groove,high-rpm,6-5/8 pulley · forengineswithshortwaterpump note important all chevy small-block and big-block engines with one-piece crankshaft seal require an externally balanced flywheel or flexplate note can be used with a water pump pulley and belt p/n 9433722 without an idler pulley or alternator bolts 12337973 flywheel bolt not shown pre-1986 flywheel 1986-up flywheel 3815933 crankshaft bolt not shown · positiveretention7/16-20x2-1/4 boltforengineswith tapped crank snouts · usewithwasherp/n14001829 383 crate engine balancer with 1-piece crank seal p/n 12498008 · fitsallchevysmall-blockv-8,big-blockv-8and90° v-6engines · soldindividually;6requiredperengine 14001829 washer not shown 3727207 flexplate bolt not shown · 1-3/4 x1/2 x5/16 thickwasherforcrankshaftbolt · fitsallchevysmall-blockv-8,big-blockv-8and90° v-6engines · soldindividually;6requiredperengine 14 flexplate 12-3/4 flexplate racing balancer p/n 24502534 and 24502535 small-block flywheels part number 14085720 3991469 year of engine 1955­1985 1955­1985 1986­up 1986­up 1986­up outside diameter 12.75 14 12.75 12.75 14 crank flange bolt pattern 3.58 3.58 3.00 3.00 3.00 clutch diameter 10.4 10.4 11 10 10.4 11 11.85 starter ring gear teeth 153 168 153 153 168 technical notes fortwo-piececrankseal.lightweightnodulariron;weighsapproximately15pounds fortwo-piececrankseal forone-piececrankseal.lightweightnodulariron;weighsapproximately17pounds standard-weightflywheelforone-piececrankseal forone-piececrankseal small-block balancers part number 12551537 3817173 88960604 12498008 6272225 24502534 24502535 engine application 1969-up305and350;90°v-6competition 1962-68302and327 1970-74350;zz4crateengine 383crateenginewith1-piececrankseal 400cuin allracing acceptsstandardpulleys allracing outside diameter 6.75 8 8 8 8 7.074 7.074 technical notes smallersizeforlimitedclearance.timingmarkis10degreesbeforekeywaycenterline.usewithtiming pointerp/n3991435 cast-iron.inertiaringis1-11/16 wide;timingmarkis2degreesbeforekeywaycenterline.donotuse pointerp/n3991436unlesstdcmarkisadjusted cast-iron.inertiaringis1-11/16 wide.usewithtimingpointerp/n3991436.forexternalbalancedengines usewith383enginecomponentsandcrankshaftp/n12489436.forexternalbalancedengines.counter weightcanberemovedforneutralbalance counterweighteddampenerforexternallybalancedcrankshaft.requiresflexplatep/n471578.timingmarkis 10degreesbeforekeywaycenterline.usewithtimingpointerp/n3991436 nascar-approvedandspeciallytunedupto9000rpm.usesstandardcrankhubdiameter nascar-approvedandspeciallytuned.usewithlarge-diameter1.598 crankshafthub 14088646 14088650 10105832 small-block flexplates part number 471598 471578 471529 14088765 12554824 14088761 year of engine 1970­1985 1970­1980 1969­1985 1986­up 1986­up 1986­up outside diameter 14 14 12.75 12.75 14 14 crank flange bolt pattern 3.58 3.58 3.58 3.00 3.00 3.00 converter bolt pattern 10.75 11.50 10.75 11.50 9.75 10.75 10.75 11.50 10.75 11.50 starter ring gear teeth 168 168 153 153 168 168 technical notes forinternallybalancedenginewithtwo-piececrankseal forexternallybalanced400-cu-inengineonly.usewithbalancerp/n6272225 forinternallybalancedenginewithtwo-piececrankseal forexternallybalancedone-piececrankseal heavy-dutyflexplatewithincreasedthicknessforone-piececrankseal,externallybalanced forone-piececrankseal,externallybalanced 174 buy online at www.gmperformanceparts.com available for purchase online at gmperformanceparts.com 175

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