Balance Shaft Installation - GMC T Series 1994 Repair Manual

34. NUT
35. STUD
36. KEY
37. GEAR, BALANCE SHAFT DRIVE
38. SPROCKET CRANKSHAFT
39. BOLT
40. SPROCKET, CAMSHAFT
41. CHAIN, TIMING
Figure 38— Installing Camshaft
BALANCE SHAFT
INSTALLATION
Install or Connect (Figures 39 and 40)
NOTICE: For steps 3, 4, and 6, refer to "No­
tice" on page 6A4-1.
Tools Required:
J 38834 Balance Shaft Bearing Service Kit
J 36996 Balance Shaft Installer
J 8092 Driver Handle
J 36660 Torque/Angle Meter
1. Balance shaft rear bearing (45) using J 38834 (fig­
ure 39).
• Dip bearing in clean engine oil before installa­
tion.
2. Balance shaft (47) into block using J 36996 and
J 8092.
A. Dip the front balance shaft bearing into clean
engine oil before assembly.
Figure 37— Camshaft and Components
B. Retaining ring on balance shaft front bearing
must be seated on case.
3. Install balance shaft bearing retainer (43) and bolts
(48).
Tighten
• Balance shaft retainer bolts (48) to 14 N.m
(120
lbs. in.).
4. Balance shaft driven gear (42) and bolt (49).
Tighten
a
• Balance shaft driven gear bolt (49) to 20 N-m
(15 lbs. ft.) plus an additional turn of 35
degrees using J 36660.
• Rotate balance shaft (47) by hand to make sure
there is clearance between the balance shaft (47)
and retainer (43). If balance shaft (47) does not
rotate freely, check to be sure retaining ring on
front bearing is seated on case.
• Turn the camshaft so, with the balance shaft drive
gear temporarily installed, the timing mark on the
drive gear is straight up.
• With the balance shaft drive gear removed, turn the
balance shaft so the timing mark on the driven
gear (42) points straight down.
5. Balance shaft drive gear (37) onto camshaft.
Important
• Make sure the timing marks on the balance shaft
drive gear and driven gear line up (figure 40).
6
. Balance shaft drive gear stud (35).
Tighten
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