Front Cover Replacement - GMC G Service Manual

Figure 16 — Removing the Torsional Damper
H Install or Connect (Figures 17 and 18)
Tools Required:
J 35468 Front Cover Aligner and Oil Seal
Installer
J 23523-E Torsional Damper Remover and
Installer
1. Crankshaft key, if removed.
2. Front crankshaft seal. Use J 35468 (figure 17). 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. J 23523-E stud (item A, figure 18) 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.
5. J 23523-E bearing, washer and nut (figure 18).
• Turn the nut to pull the vibration damper into
place.
• Remove the tool.
• Use a small amount of RTV sealant (GM part number
1052366 or equivalent) to seal the torsional damper
key to the crankshaft joint.
6. Torsional damper bolt and washer.
I ^ l Tighten
• Bolt to 95 N«m (70 ft. lbs.).
7. Accessory drive pulley.
8. Fan shroud assembly.
9. Fan pulley, fan, and fan belts. Refer to ENGINE
COOLING (SEC. 6B1).
SMALL BLOCK 6A4-15

FRONT COVER REPLACEMENT

B Remove or Disconnect
1. Torsional damper. Refer to "Torsional Damper and
Front Crankshaft Seal Replacement" in this section.
2. W ater pump. Refer to ENGINE COOLING
(SEC. 6B1).
3. Oil pan. Refer to "Oil Pan Replacement" in this
section.
4. Front cover bolts.
5. Front cover.
6. Front cover to block gasket.
7. Front crankshaft seal from the front cover. Pry out
with a screwdriver. Take care not to distort the front
cover.
PCM Clean
• Old gasket from the front cover and block.