Spark Plug Wires

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Spark plug wires (leads) from many 4-cylinder engines will the Datsun 1200, although the wires might be a little long. It is easiest to buy a set specifically for the B110's A12 engine.

Overview

• Resistor type wires are recommended to prevent radio static.
• Large diameter wires (8mm, 9mm, etc) will have no effect unless you are running a non-stock high-energy ignition system.

Inspection

You can test the spark plug wires, they last for decades.

• One by one, remove a wire from the cap. If the metal end is corroded, yet the other plug wires look good, that indicates the cylinder is not firing correctly.

• Check the spark plug wires with an ohm-meter. It should read somewhere around 1,000 ohms per inch
  • If a plug wire reads 0 ohms, or much lower than the others (per length) it is bad

• Replace those wires that are bad. Looks for burns, cuts, bubbles or detached metals ends

Likewise inspect the cap & rotor. Mine are 30 years old still working perfectly.

• You can carefully scrape the metal contacts inside the cap to bare metal
• Scrape the edge of the rotor to bare metal
• Look for burn marks inside or out, look like black scratches. Replace if any are found.

Part Numbers

RockAuto - buy online []

• AcDelco 9044N (88861957) $13
• Autolite 86406 $15
• Borg Warner CH421SP $12
• Borg Warner CH421 $16
• Bosch 09065 $15
• Beck/Arnley 1754217 $14
• NGK 9393 (NGK NE67) $13
• Niehoff 12409NPS 7mm Black Silicone $13
• Niehoff 12409N 7mm ULTRA Black Silicone $14
• Powermax 700194 $10
• Xact 4620 $12

Interchange

Spark plug wires (leads) from many 4-cylinder engines will fit, although the wires might be a little long. It is easiest to buy a set specifically for the B110's A12 engine.

For example, each set for B110 fits several other engines. It probably depends on exact how the manufacturer cut the wire lengths.

Beck/Arnley 1754217 Spark Plug wire set fits:

• B110 1971-1973
• 410 1965
• 411 1967
• 1600 Roadster 1966-1970
• 2000 Roadster 1968-1970
• 520 Pickup 1966-1968 (L16 or J13 engine)
• 521 Pickup 1969 (L16 engine)

Borg Warner CH421 fits:

• B110 1971-1973
• 520 Pickup 1968 (L16 engine)
• 521 Pickup 1969 (L16 engine)
• Fiat 124 1968-1969
• Triump Spitfire 1963-1969, 1972-1974

Nissan Competition

Source: 1984 Nissan Competition Catalog

• 99996-H2020 COMPETITION PLUG WIRE SET
  • For racing purposes only
  • [These are probably solid-core wires, which interfere with radio communications]