Tools Required

J 33049 Camshaft Bearing Replacer

1. Use the J 33049 in order to remove the inner camshaft bearing.
2. Inspect the camshaft bearings for scratches, pits or a loose bearing fit in the bores. Replace the camshaft bearings if necessary.
3. Remove the rear camshaft plug.
4. Disassemble all the camshaft bearings. Use J 33049

4.1.	Insert the tool with the correct collet into the camshaft bearing being replaced.

4.2.	Turn the tool until the collet has tightened in the bearing.

4.3.	Push the center cone against the block and into the first bearing bore to center the tool.

4.4.	Drive the bearing from the block.

Repeat this procedure in order to remove the remaining inner camshaft bearings.

4.5.	Remove the rear bearing from the front of the block.

4.6.	Remove the front bearing from the rear.

5. Clean the camshaft bearing bores in the block.

Tools Required

J 33049 Camshaft Bearing Replacer

1. Use the J 33049 in order to install the front and rear camshaft bearings.
2. Install the outer camshaft bearings first. These bearings serve as guides for the pilot, and these bearings help center the inner bearings during installation.
3. Fit the correct cam bearing into the bore. The cam bearing bores vary in size.
4. Assemble the outer camshaft bearings. Drive the bearings into place using J 33049 .

Important: The camshaft bearing hole (holes) must align with the oil hole (or holes) in the block. On some engines the oil holes may be difficult to see. If these oil holes are difficult to see, use a piece of 2 mm (3/32 in) rod to check the alignment. Rod length should be 762 mm (30 in) long.

5. Inspect the alignment of the camshaft bearing hole to the oil hole (or holes) in the block.
6. Assemble the inner camshaft bearing. Use J 33049 .

6.1.	Assemble the tool with the pilot engaged in the front bearing and the pilot flange against the front face of the block.

6.2.	Slide the puller screw (with the nut and the washer) through the pilot.

6.3.	Place the new bearing on the bearing tool. Hold the bearing tool and bearing against the bearing bore. Align the bearing hole in the block.

6.4.	Thread the puller screw into the bearing tool enough to hold the tool and the bearing in place.

6.5.	Holding the puller screw with a wrench, turn the nut with a second wrench in order to pull the camshaft bearing into place.

6.6.	Remove the puller screw, the pilot, and the bearing tool.

7. Install a new camshaft rear bearing hole plug. Coat the outside diameter of the plug with GM P/N 12345493 sealant or equivalent.

7.1.	Install the plug flush to 0.80 mm (1/32 in)

7.2.	Install the plug while RTV is still wet.