Camshaft Bearings - GMC T Series 1994 Repair Manual

Figure 47— Crankshaft Sprocket Replacement (5.0L
and 5.7L Engines)
• Camshaft journal diameter. Use a micrometer (fig­
ure 46). The proper diameter is listed in " Specifica­
tions."

CAMSHAFT BEARINGS

6
Refer to SECTION A for replacement procedures.
TIM IN G CHAIN AND
SPROCKETS
Inspect
• Sprockets for chipped teeth and wear.
• Timing chain for damage.
• It should be noted that excessively worn sprockets
will rapidly wear a new chain. Likewise, an exces­
sively worn chain will rapidly wear a new set of
sprockets.
J 22102
Figure 48—Crankshaft Sprocket Replacement (7.4L
Engines)
CRANKSHAFT SPROCKET REPLACEMENT
Disassemble (Figures 47 and 48)
❖
Tools Required:
J 5825 Crankshaft Sprocket Puller
J 28509-A Crankshaft Sprocket Puller
1
. Crankshaft sprocket. On 5.0L and 5.7L engines,
use J 5825 (figure 47). On 7.4L engines, use
J 28509-A (figure 48).
2. Key, if necessary.
Assemble (Figures 47 and 48)
*
Tools Required:
J 5590 Crankshaft Sprocket Installer
J 22102 Crankshaft Sprocket Installer
1. Key, if removed.
2. Crankshaft sprocket. Use J 5590 (5.0L and 5.7L
engines) or J 22102 (7.4L engines). Make sure the
timing mark faces outside.
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