Removal & Installation
See Figures 1 and 2
- Unfasten the retaining clips and lift the distributor cap straight up. It will be easier to install the distributor if the spark plug wires are not disconnected from the cap. If the wires must be removed from the cap remove the wires one at a time, mark or tag their positions to aid in installation.
- Disconnect the distributor wiring harness and or the electrical connection if so equipped.
On late model Datsun/Nissan a crankangle sensor is the basic component of the distributor. No vacuum lines are used just one electrical connection.
- Disconnect the vacuum lines if so equipped.
- Note the position of the rotor in relation to the base. Scribe a mark on the base of the distributor and on the engine block to facilitate reinstallation. Align the marks with the direction the metal tip of the rotor is pointing. (note the position of distributor base to engine block and distributor rotor to distributor assembly).
- Remove the bolt(s) which holds the distributor to the engine.
- Carefully lift the distributor assembly from the engine--DO NOT CRANK OR MOVE THE ENGINE AT THIS POINT OR INITIAL TIMING WILL HAVE TO BE SET!
- Insert the distributor shaft and assembly into the engine. Line up the mark on the distributor and the one on the engine with the metal tip of the rotor. Make sure that the vacuum advance diaphragm if so equipped 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 lined up with the rotor.
- Install the distributor hold-down bolt and clamp. Leave the screw loose enough so that you can move the distributor with heavy hand pressure.
- Connect the primary wire to the coil and or the electrical connections. Install the distributor cap on the distributor housing. Secure the distributor cap with the spring clips.
- Install the spark plug wires if removed. Make sure that the wires are pressed all the way into the top of the distributor cap and firmly onto the spark plug. Make sure the correct firing order is maintained.
- Adjust the ignition timing as necessary.
If the crankshaft has been turned or the engine disturbed in any manner (i.e., disassembled and rebuilt) while the distributor was removed, or if the marks were not drawn, it will be necessary to initially time the engine. Follow the procedure given below.
INSTALLATION CRANKSHAFT OR CAMSHAFT ROTATED
- It is necessary to place the No. 1 cylinder in the firing position to correctly install the distributor. To locate this position, the ignition timing marks on the crankshaft front pulley are used.
- Remove the No. 1 cylinder spark plug. Turn the crankshaft until the piston in the No. 1 cylinder is UP on the compression stroke. This can be determined by placing your thumb over the spark plug hole and feeling the air being forced out of the cylinder. Stop turning the crankshaft when the timing marks that are used to time the engine are aligned on the front timing cover assembly.
- Oil the distributor housing lightly where the distributor bears 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 tower position when the cap is installed. Of course you won't be able to see the direction in which the rotor is pointing if the cap is on the distributor. Lay the cap on the top of the distributor and make a mark on the side of the distributor housing just below the No. 1 spark plug terminal. Make sure that the rotor points toward that mark when you install the distributor.
- When the distributor shaft has reached the bottom of the hole, move the rotor back and forth slightly until the driving lug on the end of the shaft enters the slots cut in the end of the oil pump shaft and the distributor assembly slides down into place.
- When the distributor is correctly installed, the reluctor teeth should be aligned with the stator assembly. This can be accomplished by rotating the distributor body after it has been installed in the engine. Once again, line up the marks that you made before the distributor was removed.
- Install the distributor hold-down bolt.
- Install the spark plug into the No. 1 spark plug hole and continue from Step 3 of the preceding distributor installation procedure.
If your engine has a distributor with a crankangle sensor set up read the above section and then you will be able to remove and install the distributor assembly.
Basically, you have to remove the distributor cap, mark or tag all the spark plug wires and the electrical connections then remove them. Next, mark the position of the base of the distributor with relation to the engine mounting location and the rotor position as opposed to the base of the distributor assembly.
When installing the distributor, line up your marks and gently install the distributor and reconnect all spark wires and electrical connections. If you disturb the engine while the distributor is removed you will have to set initial timing.