Parts for your 1998 Nissan Navara-Spark plugs

1998 Nissan Navara Spark Plugs

Technical references, including the Nissan D22 Navara Factory Service Manual (Ignition System section) and AU/NZ parts catalogues from NGK and Bosch, confirm that the 1998 Navara was sold with both petrol and diesel engines. Petrol variants (notably the KA24E 2.4‑litre) use spark plugs, while diesel variants such as the TD27 and QD32 use glow plugs and do not use spark plugs. So, spark plugs are relevant and fitted on 1998 Nissan Navara models with petrol engines, but not on the diesels.

For the 1998 Navara with the KA24E 2.4‑litre petrol, spark plugs are the small but mighty parts that ignite the air–fuel mix, kicking off combustion and keeping the ute running smoothly. Fresh plugs help with crisp starts, steady idle, decent fuel economy, and solid pulling power. In Aussie and Kiwi conditions—heat, dust, towing, and plenty of stop‑start—they cop a harder life, so keeping on top of them pays off.

Service intervals depend on plug type and use. Copper plugs generally suit 20,000–40,000 km, while platinum or iridium can stretch to around 80,000–100,000 km. If the Navara works hard off‑road, tows regularly, or mostly does short trips, shorten the interval. Common signs it’s time include harder starts, a rough idle, misfires under load, sluggish acceleration, or higher fuel use.

When replacing, choose quality plugs matched to the engine code and build date (the KA24E commonly specifies a 1.1 mm gap in Nissan literature). Install on a cool engine, blow away grit before removal, and thread each plug by hand to avoid cross‑threading. Torque to the spec in the service manual (typically in the 18–22 N·m range for M14 gasket‑seat plugs). Modern nickel‑plated plugs generally don’t need anti‑seize, a tiny dab of dielectric grease in the boot helps future removal. Inspect the leads (or coil boots), distributor cap and rotor on KA24E models—cracked or tired ignition components can mimic bad plugs.

• Use the correct heat range and reach for the KA24E.
• Check and set gap only if the plug type allows it, many iridiums come pre‑gapped close to spec.
• If the old plugs are sooty, oily, or white‑blistered, investigate mixture, oil control, or cooling issues.

With the right plugs, proper gap, and a careful install, a 1998 Navara petrol stays eager to start and ready for the next long kilometre.

Popular questions about 1998 Nissan Navara spark plugs

What spark plug type and gap suit a 1998 Navara 2.4 petrol?
For the KA24E 2.4‑litre, parts catalogues list standard copper plugs and long‑life platinum/iridium options, with a commonly specified 1.1 mm gap in Nissan documentation. Always confirm by VIN/engine code and follow the service manual for the exact part number and gap.

How often should the plugs be changed in Australian or New Zealand conditions?
Copper plugs are typically replaced around 20,000–40,000 km, while quality platinum or iridium plugs can go 80,000–100,000 km. Shorten the interval if the ute tows frequently, drives dusty tracks, or mostly does short urban trips.

What are the symptoms of worn plugs on a KA24E Navara?
Expect harder cold starts, rough idle, hesitation under load, reduced fuel economy, and occasional misfires. If new plugs don’t clear it, check leads/boots, the distributor cap and rotor, and fuel/air filters.