REMOVAL & INSTALLATION
See Figures 1 through 9
Except for the cap, adapter, rotor, Hall effect stator, TFI module (if applicable) and O-ring, no other distributor assembly parts are replaceable. There is no calibration required with the universal distributor. The distributor assembly can be identified by the part number information printed on a decal attached to the side of the distributor base.
- Disconnect the negative battery cable.
Set the No. 1 cylinder at TDC on the compression stroke with the timing marks aligned. To set the engine to TDC on No. 1 cylinder compression stroke, perform the following:
- Remove the rocker arm cover over the valves of cylinder No. 1.
- Rotate the crankshaft until the timing mark aligns with the TDC mark. While rotating the crankshaft watch the valves of cylinder No. 1. Since the crankshaft timing mark can align with the TDC mark on both the exhaust stroke and compression stroke, it is imperative that both the intake and exhaust valves are closed when cylinder No. 1 reaches TDC. If this is the case, cylinder No. 1 is at TDC on the compression stroke. If the exhaust valve is still not completely closed, or if the intake valve has opened some what, Cylinder No. 1 is on the exhaust stroke and must be rotated another 360°.
- Disconnect the primary wiring connector from the distributor.
- Mark the position of the No. 1 spark plug wire tower on the distributor base for future reference before removing the distributor cap.
- Use a screwdriver to remove the distributor cap and adapter. Position the distributor cap and any attached ignition wires to the side.
- Remove the rotor.
- For vehicles with the TFI IV ignition system (1986-92 models), remove the TFI wiring connector, if applicable.
- Remove the distributor hold-down bolt and clamp. Some engines may be equipped with a security type hold-down bolt, requiring a Torx® bit of the proper size to remove it.
- Remove the distributor by lifting it straight up.
- If the engine was rotated while the distributor was removed, once again set the No. 1 cylinder at TDC on the compression stroke with the timing marks aligned for correct initial timing.
- Rotate the distributor shaft so that the rotor tip is pointing toward the mark previously made on the distributor base (No. 1 spark plug tower). Continue rotating slightly so that the leading edge of the vane is centered in the vane switch stator assembly.
- Rotate the distributor in the engine block to align the leading edge of the vane and the vane switch and verify that the rotor is pointing at No. 1 cap terminal.
If the vane and vane switch stator cannot be aligned by rotating the distributor in the engine block, pull the distributor out of the block enough to disengage the distributor and rotate the distributor to engage a different distributor gear tooth. Repeat Steps 9 and 10 if necessary.
- Install the distributor hold-down bolt and clamp, but do not tighten yet.
- Connect the distributor TFI and primary wiring harnesses.
- Install the distributor rotor and tighten the attaching screws to 24-36 inch lbs. (3-4 Nm).
- Install the distributor cap and tighten the attaching screws to 18-23 inch lbs. (2-3 Nm). Check that the ignition wires are securely attached to the cap towers.
- Install the ignition wires to the spark plugs, making sure they are in the correct firing order and tight on the spark plugs.
- Check and adjust the initial timing to specifications with a timing light. Refer to the tune-up chart or the underhood emission control sticker for initial timing specifications. The ignition timing procedure is outlined in Routine Maintenance . No attempt should be made to alter the timing from factory specifications.
- Once the initial timing is set, tighten the distributor hold-down bolt to 17-25 ft. lbs. (23-34 Nm). Recheck the timing, then remove the timing light.