REPAIR INSTRUCTIONS

Installation

Refer to Figure 164.

Each camshaft bushing is located at set distances from the thrust washer mounting surface to the forward edge of the bushings.

Correct installation of each camshaft bushing is very important. If a bushing is not properly aligned with both its oil supply and oil feed passages in the cylinder block, either the camshaft bushing will fail or the components lubricated by the bushing feed will fail from inadequate lubrication.

164

Repair Instructions

Refer to Figure 166.

1.Position a replacement bushing (2) against the side of the block at the No. 7 (rear) bushing bore. Align the oil hole in the bushing (1) with the oil passage (7) in the block.

2.Using a dark-colored felt-tip marker, mark the block and the bushing with a line (5) to facilitate correct alignment during installation.

3.Clean the surfaces of the bushing and the bore. Dry both surfaces with compressed air.

4.Using bushing remover/installer J 21428-01 kit (4) and the appropriate pilot adapter J 37713 (3), install the bushing.

5.Check the surface of the bushing for burrs caused by installation.

Refer to “FITS AND LIMITS” on page 289 for correct bushing ID dimensions.

Refer to Figure 167.

6.Using an inside micrometer or telescope gauge, measure the ID of the bushing to ensure against an undersize bushing. An undersize bushing may cause the camshaft to seize in the bushing during installation. 167

7.Repeat steps 1 through 6 for all of the remaining bushings in sequence.

Auxiliary Driveshaft Bushing Replacement

Description

The front and rear auxiliary driveshaft bushings are identical. Engine lubrication oil passing through the No. 1 camshaft bushing supplies oil to the front auxiliary driveshaft bushing. Oil passing through the No. 4 camshaft bushing supplies oil to the rear auxiliary driveshaft bushing. A groove in the rear auxiliary driveshaft journal, in conjunction with a rifle-drilled hole in the auxiliary driveshaft and a small metered oil feed hole inside a cup plug, supplies lubrication oil to the raw water pump.