The HS-HIT4 distributor is compatible with these standard Hitachi parts:

Can use standard Hitachi 4-cylinder Rotor and Distributor Cap (a matched set):  for 4-cylinder 22100-J1710 Nissan Z24 engine

Replaces certain 4-cylinder Hitachi L16, L18 and L20B vacuum-advance distributors

We inspect each distributor thoroughly; everything is checked, adjusted, lubricated, etc.

Installing the HS-HIT4 Distributor
Rotate the engine until the rotor is pointing at No.1 Cylinder's spark plug wire. Remove each spark plug wire from the old distributor cap, one-at-a-time, and insert it into the new distributor cap in the same location and order (cylinders 1-3-4-2, counter- or anti-clockwise).

Remove the old distributor and remove its clamp. Coat the new distributor's shaft and O-Ring with motor oil before sliding it into its hole. Look down into the engine's distributor hole to see how the distributor drive slot is oriented and turn the distributor shaft to match it. Work the shaft down all the way, turning the rotor gently, as needed, until the distributor shaft gear settles into its slot and the rotor will no longer turn.

Turn the distributor body until the rotor points to the spark plug wire of No. 1 Cylinder. Place the cap on the new distributor. Tighten the distributor clamp enough so that the distributor can't turn on its own, but you can still turn it by hand.

Timing the HS-HIT4 Distributor
Use a stroboscopic timing light. Timing should be set initially to about 32° BTDC at 3,500+ RPM, vacuum hose connected. Firing order is: 1-3-4-2, counter-clockwise (anti-clockwise). The ignition timing should be checked with the engine running, using a stroboscopic timing light, ensuring optimum engine performance and economy. Paint a small line of white paint on both the reference pointer and the appropriate mark on the timing scale to make them more easily seen. With the engine running at the specified speed, the appropriate timing mark should be in line with the reference pointer. Rotate the distributor body clockwise to advance the timing, or counter-clockwise to retard it. Tighten the distributor clamp. Reconnect the vacuum line to the distributor's vacuum canister port.

This distributor requires a 12-volt, negative ground electrical system.

Coil: A coil with 3.0 Ohms or more primary resistance must be used. The Bosch Black Coil with 3.4 Ohms primary resistance is ideal for 4- and 6-cylinder ignition kits.

To measure coil's primary resistance: Label and remove all wires to coil ( + or - ). Using a common digital multimeter in the 200 Ω mode, cross the red and black leads of the Ohmmeter. Allow 10 seconds or more for the reading to settle and write down the reading. Still in the 200 Ohm mode, measure between coil’s + and - terminals. Allow a few seconds for the reading to settle, until it stabilizes. Subtract the previous reading, taken with the leads crossed, to compensate for multimeter’s inherent resistance. Do not use a low-resistance coil, such as the MSD or Accel coil; they don’t have enough primary resistance for this application.

www.Hot-Spark.com/Coil.htm

Test the charging system's maximum voltage:  If the charging system voltage, measured at the coil's + terminal, is more than 13.9 volts at higher RPM levels, the voltage regulator likely needs replacing or a 1.4 Ohm ballast resistor should be wired between the coil's + terminal and the red HotSpark ignition wire. Too much voltage can damage the ignition module and other electronic components.

Critical: Before ordering this distributor, remove your current Hitachi distributor and compare its drive shaft dimensions and drive gear with the above photos. If this distributor won't fit your engine, a 25% restocking fee applies to undamaged, like-new returned items. Returned items must be in perfect condition, otherwise no refund will be granted.

Replaces 4-cylinder Hitachi Distributors in Certain Datsun/Nissan L16, L18 and L20B Engines (single-point versions only):

Hello, Hot-Spark -

This is to express my thanks for the excellent service you recently provided me. The Hot Spark electronic distributor has behaved faultlessly during our 17,000 miles trip through South and Central America.


Kind regards,

Ross Letten
Australia