Chevrolet Silverado / GMC Sierra. Manual — part 156
1. Select the cone (1), the handle (10), the expanding driver (4-8), the washer (2 or 3), and the
expander assembly (15) from the J 33049 . See Special Tools.
2. Assemble the J 33049 . See Special Tools.
Fig. 524: Removing/Installation Camshaft Inner Bearing Using J 33049
Courtesy of GENERAL MOTORS CORP.
CAUTION: Refer to SAFETY GLASSES CAUTION .
IMPORTANT:
A loose camshaft bearing may be caused by an enlarged,
out-of-round, or damaged engine block camshaft bearing
bore.
Always remove the camshaft inner bearings #2 and #3
first. The camshaft outer bearings #1 and #4 serve as a
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
3. Remove the camshaft inner bearings #2 and #3.
1. Insert the J 33049 through the front of the engine block and into the camshaft inner
bearing #2. See Special Tools.
2. Tighten the J 33049 expander assembly nut until snug. See Special Tools.
3. Push the J 33049 guide cone into the camshaft front bearing in order to align the J
33049 . See Special Tools.
4. Drive the camshaft inner bearing #2 from the camshaft inner bearing bore #2.
5. Loosen the J 33049 expander assembly nut. See Special Tools.
6. Remove the camshaft inner bearing #2 from the J 33049 expander assembly. See
Special Tools.
7. Insert the J 33049 expander assembly into the camshaft inner bearing #3. See Special
Tools.
8. Tighten the J 33049 expander assembly nut until snug. See Special Tools.
9. Push the J 33049 guide cone into the camshaft front bearing in order to align the J
33049 . See Special Tools.
10. Drive the camshaft inner bearing #3 from the camshaft inner bearing bore #3.
11. Loosen the J 33049 expander assembly nut. See Special Tools.
12. Remove the camshaft inner bearing #3 from the J 33049 expander assembly. See
Special Tools.
4. Remove the J 33049 from the engine block. See Special Tools.
5. Remove the camshaft outer bearings #1 and #4.
1. Insert the J 33049 into the camshaft outer bearing #1. See Special Tools.
2. Tighten the J 33049 expander assembly nut until snug. See Special Tools.
3. Drive the camshaft outer bearing #1 from the camshaft outer bearing bore #1.
4. Loosen the J 33049 expander assembly nut. See Special Tools.
5. Remove the camshaft outer bearing #1 from the J 33049 expander assembly. See
Special Tools.
6. Remove the J 33049 from the engine block. See Special Tools.
7. Insert the J 33049 into the camshaft outer bearing #4. See Special Tools.
8. Tighten the J 33049 expander assembly nut until snug. See Special Tools.
9. Drive the camshaft outer bearing #4 from the camshaft outer bearing bore #4.
guide for the J 33049 . See Special Tools.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
10. Loosen the J 33049 expander assembly nut. See Special Tools.
11. Remove the camshaft outer bearing #4 from the J 33049 expander assembly. See
Special Tools.
6. Remove the J 33049 from the engine block. See Special Tools.
7. Discard the camshaft bearings.
CAMSHAFT BEARING INSTALLATION
Tools Required
J 33049 Camshaft Bearing Service Kit. See Special Tools.
Installation
Fig. 525: Locating Camshaft Bearing Lubrication Hole At 3 & 9 O'clock Positions
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: When installing the camshaft bearings, always look in order to
ensure that the camshaft bearing lubrication hole is located
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
above the 3 o'clock position (1) or the 9 o'clock position (2). The
proper positioning of the camshaft bearing lubrication hole is in
order to ensure the best lubrication of the engine camshaft
journals.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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