GM Chevy Mid-Size Cars 1964-1988 Repair Guide

Timing Gear



See Figure 1

Inline 6-Cylinder

The timing gear is pressed onto the camshaft. An arbor must be used to remove or install the timing gear.

  1. Remove the camshaft from the engine. For details, refer to the camshaft removal procedure found later in this section.
  3. Using an arbor press, a press plate and gear removal tool J-971 (or equivalent), press the timing gear from the camshaft.

When pressing the timing gear from the camshaft, be certain that the position of the press plate does not contact the woodruff key.

To install:
  1. Position the press plate to support the camshaft at the back of the front journal. Place the gear spacer ring and the thrust plate over the end of the camshaft, then install the woodruff key. Press the timing gear onto the camshaft, until it bottoms against the gear spacer ring.

The end clearance of the thrust plate should be 0.0015-0.005 in. If less than 0.0015 in., replace the thrust plate.

  1. Align the timing marks and install the camshaft.

Click image to see an enlarged view

Fig. Fig. 1: Timing gear alignment-inline 6-cylinder engine