Torsional Damper Installation Figure 12-79 Tool Required : J 39046 Torsional Damper Puller and Installer Install or Connect 1 . Apply RTV sealant GM P/N 12345739 to crankshaft keyway (if removed). 2 . Crankshaft key (if removed). NOTICE: The inertial weight section of the torsional damper is assembled to the hub with rubber type material. The correct installation procedures (with the proper tool) must be followed or movement of the inertial weight section of the hub will destroy the tuning of the torsional damper. 3 . Stud (part of J 39046) to the crankshaft. Thread the stud fully into the tapped hole in the crankshaft. 4 . Torsional damper over the end of the stud.
Align the keyway in the torsional damper shaft with the crankshaft key. 5 . Bearing, washer, and nut. A . Turn the nut to pull the torsional damper into place (figure 12-79). B . Remove the tool. 6 . Torsional damper bolt and washer. NOTICE : Refer to “Notice” on page 1. Tighten • Bolt to 95 N m (70 lb. ft.). Oil Pump Installation Figure 12-80 Install or Connect 1 . Oil pump to the engine. • Align the slot in the oil pump shaft with the tang on the distributor shaft. • The oil pump should slide easily into place. • No gasket is used. 2 . Oil pump to main bearing cap bolt. NOTICE : Refer to “Notice” on page 1. Tighten • Oil pump to main bearing cap bolt to 90 N m (66 lb. ft.).
Figure 12-80 Oil Pump Installation Figure 12-79 Installing Torsional Damper G643 (E) Service Manual Chapter 3. Engine Mechanical System 101