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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.
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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.
BECK/ARNLEY 1754217
NGK 8 mm (large diameter) silicone leads
Inspection
You can test the spark plug wires, they can last for decades unless they get oil-soaked or burned.
- One by one, remove a wire from the cap. If one has a metal end that is corroded -- yet the other plug wires look good -- that indicates that particular 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.
Inspect the high tension leads:
- Visually inspect the spark plug wires carefully for cracks or burn marks. Throw away any that have them.
- Measure resistance with an ohmmeter. Resistor wires (modern wires) should be around 10,000 ohms per foot. Antique or racing wires will have far less resistance. Throw out any with resistance too high.
- Check the metals ends of the wires and the distributor cap. If one end is oxidized compared to the others (e.g one plug end is oxidized, the other three are shiny), that cylinder isn't firing correctly. Could be the cap, the wire, a vacuum leak, bad cylinder compression or some other reason.
Check for burn marks where the leads touch metal
Spacers help prevent shorting/sparking/burning by separating the leads
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: * 22450-H1025 Datsun B110 1971-1973 * 22450-13225 Datsun 410 1965 * Datsun 411 1967 * Datsun 1600 Roadster 1966-1970 * Datsun 2000 Roadster 1968-1970 * 22450-14825 Datsun 520 Pickup 1966-1968 (J13 engine) 22450-14929 * Datsun 521 Pickup 1969 (L16 engine) * 22183-71300 1965 Nissan Cedrice 1900 G31 * 22450-38725 1964 Nissan Cedric H31 * 22450-85029 Nissan Clipper T665L-2,D665A02
Borg Warner CH421 fits: * B110 1971-1973 * 520 Pickup 1968 (L16 engine) * 521 Pickup 1969 (L16 engine) * Fiat 124 1968-1969 * Triumph Spitfire 1963-1969, 1972-1974
Nissan Competition
Source: 1984 Nissan Competition Catalog
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* 99996-H2020 COMPETITION PLUG WIRE SET For racing purposes only |
These are probably solid-core wires, which interfere with radio communications.