Chevrolet Nova/ChevyII 1962-1979

Conventional Ignition System



  1. Disconnect the vacuum advance line at the distributor.
  3. Disconnect the primary wire at the coil.
  5. Unfasten the distributor cap retaining clips and lift off the cap. If it is necessary to disconnect any wires, mark them first.
  7. Mark the distributor body and the engine block to indicate the position of the body in the block. Scribe a mark on the edge of the distributor housing to indicate the position of the rotor on the distributor. These marks can be used as guides when installing the distributor in a correctly timed engine.
  9. Remove the distributor hold-down clamp screw and clamp.
  11. Carefully lift the distributor out of the block.

To install:

If the crankshaft has not been rotated while the distributor was removed from the engine, installation is the reverse of the removal procedure. (See steps two, three, and four of the procedure below.) Use the reference marks that were made before removal to correctly position the distributor in the block. Check the point gap and, before connecting the vacuum advance line, adjust the ignition timing. (See the "Tune-Up Procedures" section.)

If the crankshaft has been rotated or otherwise disturbed (as during engine rebuilding) after the distributor was removed, proceed as follows to install the distributor.

  1. Bring the No. 1 piston to top dead center (TDC). By removing the No. 1 spark plug and inserting a finger into the hole, while rotating the crankshaft, the compression pressure can be felt as the No. 1 piston approaches TDC. The TDC timing mark on the crankshaft vibration damper should now be opposite the indicator on the timing chain case.
  3. Position the distributor to the block so that the vacuum control unit is in its normal position.
  5. Position the rotor to point toward the front of the engine (with the distributor held out of the block, but in the installed attitude). Turn the rotor counterclockwise about one-eighth turn and push the distributor down to engage the camshaft drive. It may be necessary to move the rotor one way or the other to mesh the drive and driven gears properly.
  7. While holding the distributor down in place, engage the starter a few times to make sure the oil pump shaft is engaged. Install the hold-down clamp and bolt and snug up the bolt.
  9. Once again, rotate the crankshaft until No. 1 cylinder is on the compression stroke and the harmonic balancer mark is on 0°.
  11. Turn the distributor body slightly until the points open. Tighten the distributor clamp bolt.
  13. Place the distributor cap in position and see that the rotor lines up with the terminal for the No. 1 spark plug.
  15. Install the cap and distributor primary wire, and double check the plug wires in the cap towers.
  17. Start the engine and set the timing according to the "Tune-Up Specifications" chart.
  19. Reconnect the vacuum hose-to-vacuum control assembly.