Chevrolet Cobalt Service & Repair Manual: Balance Shaft R&R

1. Remove the balance shaft bearing carrier bolts, Fig. 1.
2. Remove the balance shaft assemblies.
3. Install tool No. J-43650 installer into the balance shaft hole and insert the tool with the foot parallel to the shaft, Fig. 2.
4. When tool No. J-43650 installer is inserted in the block turn tool No. J-43650 installer so that the foot becomes perpendicular to the shaft.
5. Center the foot of tool No. J-43650 installer on the balance shaft bushing.
6. Once tool No. J-43650 installer is centered on the balance shaft bushing, insert the centering guide into the front balance shaft bore and tighten the nut with an appropriate wrench. When tool No. J-43650 installer is properly installed, before removing the bushing, the end of the tool should be 4.6 inches (a) from the block face. If tool No. J-43650 installer is less than approximately 4.5 inches (a), recheck the tool alignment.
7. Tighten the nut on tool No. J-43650 installer until the tension releases. When the tension releases, remove tool No. J-43650 installer and the balance shaft bushing.
8. Reverse procedure to install. Torque balance shaft retaining bolts to 89 inch lbs.

Fig. 1 Balance shaft bearing carrier bolts

Fig. 2 Balance shaft replacement

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