Parts for your 1998 Nissan Navara-Coolant

1998 Nissan Navara coolant: purpose, care and when to change it

Coolant is absolutely relevant and used on every 1998 Nissan Navara. Technical sources including the Nissan D22 Navara Factory Service Manual (Cooling System section), the 1998 Owner’s Manual, and Gregory’s/Haynes service manuals all specify a pressurised liquid-cooling system using ethylene-glycol based Nissan Long Life Coolant. That means the Navara relies on coolant for temperature control, corrosion protection and reliable running in Aussie and Kiwi conditions.

In this Navara, coolant does far more than stop the engine from overheating. It raises the boiling point, prevents freezing on alpine trips, resists internal corrosion, and lubricates the water pump. The system holds roughly 7–9 litres depending on engine (KA24E petrol, TD27/QD32 diesel, etc.), and works best with a 50/50 mix of approved concentrate and demineralised water, or a premix that meets Nissan LLC or ASTM D3306 specifications. Sticking with a quality, silicate-free, ethylene-glycol coolant is the go-to for these D22s.

As part of regular servicing, it pays to refresh the coolant on time. Period-correct green Nissan Long Life Coolant is typically due every 2 years or around 40,000 km. If the vehicle has been fully flushed and switched to genuine Nissan “blue” long-life P-OAT coolant, longer intervals may apply, but only when documented and mixed correctly. Always avoid mixing different coolant chemistries or colours—if unsure what’s in the system, plan a complete flush.

When replacing coolant, do it with the engine cold. Drain the radiator (and block drain if fitted), set the heater to hot, then refill slowly with the correct mix. Bleed air through the bleed screw if equipped, or by running the engine with the cap off until bubbles stop and the thermostat opens. Top up the overflow bottle to the MAX mark, fit the cap, and check for leaks. Dispose of old coolant responsibly—it's toxic to pets and wildlife.

• Inspect hoses and clamps for softness, swelling or crusty deposits.
• Test or replace the radiator cap (correct pressure rating is vital).
• Look for signs of contamination: rusty colour, oil sheen, flakes or sludge.
• After the first drive cycle, recheck the level in the bottle and radiator.

Treat coolant as preventative maintenance. A fresh, correctly mixed fill protects the alloy head, heater core and water pump, helping this 1998 Navara stay happy on farm tracks, job sites and long highway hauls alike.

What coolant does a 1998 Nissan Navara use?

The 1998 D22 Navara uses an ethylene-glycol based, silicate-free coolant that meets Nissan Long Life Coolant requirements (or ASTM D3306). A 50/50 mix with demineralised water is ideal. Period-correct coolant is typically green