For ignition system service not found below, please refer to Engine Electrical of this information.
REMOVAL & INSTALLATION
See Figures 1 and 2Point-Type Ignition, 1964-74
- Disconnect the negative battery cable.
- Remove the distributor cap and position it out of the way.
- Disconnect the primary coil wire and the vacuum advance hose.
- Scribe a mark on the distributor body and the engine block showing their relationship. Mark the distributor housing to show the direction in which the rotor is pointing. Note the positioning of the vacuum advance unit.
- Remove the hold-down bolt and clamp and remove the distributor.
To install the distributor with the engine undisturbed:
- Reinsert the distributor into its opening, aligning the previously made marks on the housing and the engine block.
- The rotor may have to be turned either way a slight amount to align the rotor-to-housing marks.
- Install the retaining clamp and bolt. Install the distributor cap, primary wire or electrical connector, and the vacuum hose.
- Start the engine and check the ignition timing.
To install the distributor with the engine disturbed:
- Turn the engine to bring the No. 1 piston to the top of its compression stroke. This may be determined by inserting a rag into the No. 1 spark plug hole and slowly turning the engine over. When the timing mark on the crankshaft pulley aligns with the 0 on the timing scale and the rag is blown out by compression, the No. 1 piston is at top dead center (TDC).
On Mark IV (big block) V8 engines there is a punch mark on the distributor drive gear which indicates the rotor position. Thus, the distributor may be installed with the cap in place. Align the punch mark 2 degrees clockwise from the No. 1 cap terminal, then rotate the distributor body1/8turn counterclockwise and push the distributor down into the block.
- Install the distributor to the engine block so that the vacuum advance unit points in the correct direction.
- Turn the rotor so that it will point to the No. 1 terminal in the cap.
- Install the distributor into the engine block. It may be necessary to turn the rotor a little in either direction in order to engage the gears.
- Connect the negative battery cable, then tap the starter a few times to ensure that the oil pump shaft is mated to the distributor shaft.
- Bring the engine to No. 1 TDC again and check to see that the rotor is indeed pointing toward the No. 1 terminal of the cap.
- After correct positioning is assured, turn the distributor housing so that the points are just opening. Tighten the retaining clamp.
- Install the cap and primary wire. Check the ignition timing. Install the vacuum hose.