5. Torsional Damper Bolt; Torsional Damper And Front Crankshaft Seal Replacement - GMC G Service Manual

6A5-10 7.4 LITER V8
TORSIONAL DAMPER AND
FRONT CRANKSHAFT SEAL
REPLACEMENT
H Remove or Disconnect (Figure 10)
Tool Required:
J 23523-E Torsional Damper Puller and
Installer
1. Battery negative cable.
2. Fan belts, fan, and pulley.
3. Fan shroud assembly.
4. Accessory drive pulley.

5. Torsional damper bolt.

6. Torsional damper. Use J 23523-E (figure 10).
7. Front crankshaft seal. Pry out with a large screw­
driver. Take care not to distort the front cover.
8. Crankshaft key, if necessary.
Il? | Inspect
• Oil seal contact area on the torsional damper shaft for
grooving and roughness. Replace if necessary.
H Install or Connect (Figures 11 and 12)
Tools Required:
J 22102 Seal Installer
J 23523-E Torsional Damper Puller and
Installer
1. Crankshaft key, if removed.
2. Front crankshaft seal. Use J 22102 (figure 11). The
open end of the seal faces inside the engine. Coat the
seal lips with engine oil.
NOTICE: The inertia weight section of the tor­
sional damper is assembled to the hub with a
rubber type material. The correct installation
procedures (with the proper tool) must be fol­
lowed or movement of the inertia weight section
of the hub will destroy the tuning of the torsional
damper.
3. Stud (item A, figure 12) 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 crank­
shaft key.
• Use a small amount of RTV sealer to seal the crank­
shaft key to crankshaft joint.
5. Bearing, washer and nut (figure 12).
• Turn the nut to pull the vibration damper into
place.
• Remove the tool.
6. Torsional damper bolt and washer.
HH] Tighten
• Bolt to 115 N*m (85 ft. lbs.).
7. Accessory drive pulley.
8. Fan shroud assembly.
9. Fan pulley, fan, and fan belts.
10. Battery negative cable.
A. Installation Stud
B. Nut
C. Washer and Bearing
Figure 12 — Installing the Torsional Damper
B-07880