GM BALANCERS & PULLEYSA smooth running engine depends on an effective balancer or torsional damper. A GM Performance Parts damper not only helps your engine run smoothly, it can extend the life of the engine. Pulleys 3899660 Crankshaft Pulley, 6" (not shown) • Two groove • Cast iron • High rpm, power-saving crankshaft pulley Balancer Bolts & Washers 9419218 Crankshaft Bolt (not shown) • Positive retention 1/2-20 x 1-1/2" bolt • For engines with tapped crank snout
• Use with washer P/N 3864814 3864814 Washer (Crankshaft Bolt) (not shown) • 2.06" OD x 0.52" ID x 0.28" thick washer • For crankshaft bolt GM BIG-BLOCK BALANCERSPart Engine Outside Technical Notes Number Application Diameter 3879623 Originally used on 1967–1969 427 8" Can be used on all engines with internally balanced crank. Use with timing pointer P/N 3991436. 10216339 454 and 502 with 4.00"-stroke crank 8" Counterweighted for externally balanced engines. Use chrome timing pointer P/N 3991436. 88962814 572 8" SFI-approved |