GMC 4000 Series Service Manual page 284

Figure 2 7 — Centering Tool in Engine Cover
damper installation will not damage seal and to
position seal to seat evenly around the damper or
hub surface.
4. With centering Tool (J-0966) in place (fig.
27), position cover on front of cylinder block, in­
stall attaching bolts, and tighten firmly (6% foot­
pounds torque). Install two oil pan bolts, then re­
move centering tool.
5. Install crankshaft damper and pulley, re­
ferring to instructions given previously.
OIL SEAL REPLACEMENT
Removal
If front cover is installed, remove crankshaft
damper as previously instructed, then use suitable
tool to pry the seal out of cover.
If cover is removed from engine, drive oil
seal out of cover with suitable tool, then clean the
seal recess.
Installation
If cover is installed on engine, Tool (J-8340)
may be used as shown in figure 28 to drive new oil
seal into cover. The seal lip must be toward inner
side of cover.
When installing oil seal with cover removed,
Figure 2 8 — Installing Front Cover O il Seal (Cover Installed)
G M C S E R V I C E M A N U A L
support inner side of cover with Tool (J-971), posi­
tion seal with lip toward inner side of cover, then
use Tool (J-995) to drive new oil seal squarely
into cover as shown in figure 29.
FLYWHEEL REPLACEMENT
(All Except 292 Engines)
necessary), then remove the flywheel bolts, and
remove flywheel from crankshaft.
crankshaft, then place flywheel at crankshaft and
install bolts. Tighten bolts to 60 foot-pounds. Fig­
ure 30 shows flywheel installation views. Install
clutch parts (if used) and install transmission.
FLYWHEEL REPLACEMENT (292 Engines)
from engine. Remove engine oil pan and rear main
bearing cap, then use hammer and drift to drive
GASOLINE ENGINES
Figure 2 9 — Installing Front Cover Oil Seal
1. Remove transm ission and clutch parts (as
2. Clean mating surfaces on flywheel and
1. Remove transm ission and clutch mechanism
Figure 3 0 — Flyw heel Installation (Typical)
Sec. 6A
Page 273