- Remove the coil wire from the distributor cap terminal.
- Remove the distributor cap.
- Disconnect the vacuum advance line at the distributor.
- Note the position of the rotor and scribe a mark on the distributor body, indicating its position. Scribe two more marks, one on the body of the distributor and another on the engine block, indicating the position of the distributor body in relation to the engine block. All of the scribe marks should be made in line with each other, starting with the metal tip of the rotor and ending with the mark on the engine block. These marks will be used as guides when installing the distributor in the correctly timed engine (not disturbed).
- Disconnect the wiring harness from the distributor.
- Remove the retaining bolt and lockwasher which hold the distributor in the engine.
- Lift the distributor out of the engine block.
Engine Not Disturbed
- Insert the distributor shaft into the engine. Align the marks on the distributor body with the metal tip of the rotor and the mark made on the engine block. Make sure that the vacuum advance diaphragm is pointed in the same direction as it was pointed originally. This will be done automatically if the marks on the engine and the distributor are aligned properly.
- Install the distributor lockbolt and clamp. Leave the screw loose enough that you can turn the distributor with your hand.
- Connect the distributor primary wire and install the distributor cap. Secure the distributor cap with the spring clips.
- Install the spark plug wires. Make certain that the wires are pressed all the way into the top of the distributor cap and firmly onto the spark plugs.
- Adjust the point dwell and set the ignition timing. Refer to the "Tune-Up" Section (Chapter 2).
If the engine has been disturbed, (i.e., crankshaft turned) while the distributor has been removed or the alignment marks were not drawn, it will be necessary to initially time the engine. Follow the procedure given below:
- Place the No. 1 piston at TDC of the compression stroke. To determine this, remove the spark plug from the No. 1 cylinder and the high-tension coil wire from the distributor cap. Place your thumb over the spark plug hole while the engine is cranked. You will feel air being forced out of the cylinder as the piston comes up on its compression stroke. As soon as you feel this, stop cranking the engine. The final positioning adjustment for the No. 1 piston is to align the TDC timing mark with the pointer or notch in the crankshaft pulley.
- Lightly oil the distributor housing, where the distributor mounts on the cylinder block.
- Install the distributor so that the rotor, which is mounted on the shaft, points toward the No. 1 spark plug terminal of the distributor cap. To facilitate this operation, place the distributor cap on the distributor body in its normal position and make a mark on the body of the distributor just below the No. 1 spark plug terminal tower. Make sure that the metal tip of the rotor is pointing toward the mark when the distributor is installed.
- When the distributor shaft has reached the bottom of the hole, move the rotor back and forth slightly until the drive gears of the distributor shaft and the camshaft mesh and the distributor assembly slides down into place.
- When the distributor is correctly installed, the breaker point contacts should be in such a position that they are just ready to break contact with each other. This is accomplished by rotating the distributor body after it has been installed in the engine.
- Install the distributor retaining plate and lockbolt.
- Install the spark plug into the No. 1 cylinder spark plug hole and continue from Step 3 of the distributor installation procedure for engines that have not been disturbed.