REMOVAL & INSTALLATION
Engine Not Disturbed
This procedure outlines the steps for removing and installing the distributor, assuming the engine was not rotated while the distributor was out of the vehicle.
- Turn the crankshaft to align the timing mark on TDC and the distributor rotor facing No. 1 plug wire.
- Disconnect the negative battery cable.
- Remove the intercooler on the 3S-GTE engine for clearance. Disconnect the air temperature sensor, cruise control actuator cable and air cleaner hose, if more clearance is necessary.
- Disconnect the IIA connectors or ESA connectors.
- Disconnect the spark plug wires.
- Remove the distributor hold-down bolts.
- Remove the distributor assembly.
- If not already aligned, turn the crankshaft to align the timing mark on TDC on the compression stroke.
- Apply a light coat of engine oil to the O-ring.
- Align the cutout of the coupling with the line of the housing, or the protrusions on the housing with the spiral gear.
- Insert the distributor, aligning the center of the flange with that of the bolt hole on the cylinder head.
- Lightly tighten the hold-down bolts.
- Connect the wiring connectors.
- Connect the plug wires.
- Reconnect the battery cable.
- Adjust ignition timing.
If the engine has been turned, cranked or the timing position otherwise disturbed, the engine must be re-set to TDC/compression on No. 1 cylinder. This is necessary so that the distributor's position will agree with the engine's position. (When the distributor's match marks are aligned, it is set to fire cylinder 1.)
The engine must be turned clockwise until the timing marks align. Since this position occurs on both the compression and exhaust stroke of the piston, you have a 1 out of 2 chance of being right; an additional check must be performed to guarantee the correct position.
On the 3S-FE, 3S-GE, 3S-GTE, 5S-FE engines, observe the intake camshaft through the distributor hole and position the slot vertically with the offset to the right as you view it. Note that the cam end is not symmetric but has a distinct offset. Once this position is achieved approximately, observe the timing marks and align them exactly at zero.
The 4A-FE follows the same steps as the 3S-FE except the slot aligns at 8 o'clock and 2 o'clock. Note that the slot is offset and is correctly positioned with the slot offset to the bottom or lower side.
The 2S-E engine requires removal of the No. 1 spark plug to confirm TDC. With the plug out, place a finger over the plug hole and rotate the engine clockwise. As the timing marks approach zero, you should feel compression (air pressure) against your finger; align the timing marks. If not, continue another full revolution and align the timing marks.
Any engine can be set to TDC/compression on No. 1 cylinder by checking for compression at the No. 1 spark plug hole as the timing marks approach zero. However, with many spark plugs found in deep wells within twin-cam heads, plugging the hole with a finger or tool handle becomes awkward and unreliable.