Note

On late 1977 and later engines, the pitch diameter on the camshaft, pinion gear and breather valve gear was changed. These components are not interchangeable with earlier style components unless replaced in sets only. Late 1977 and later gear sets are identified by a circular groove machined in the outer face of the cam gear. Pinion and cam gears are color coded according to their pitch diameter. When replacing single gears, replacement gears should be matched according to the same color code. If gears are not matched, lifter noise or gear whine may result.

Figure 3-34. Removing and Installing Cam Gear Needle Bearing
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