Parts for your 2002 Nissan Navara-Radiator

2002 Nissan Navara Radiator — Purpose, care, and when to replace

Based on the Nissan D22 Navara Factory Service Manual (Cooling System section) and OEM parts catalogues for the D22 platform, the 2002 Nissan Navara is equipped with an engine radiator. Across the KA24DE petrol and the TD27/QD32/ZD30/YD25 diesel options (market-dependent), it uses a crossflow aluminium core with plastic end tanks, and many automatic models integrate a transmission fluid cooler in the lower tank.

The radiator’s job is simple but vital: it dumps engine heat into the airstream so the Navara stays in its comfort zone, whether towing, crawling on a track, or idling on a hot arvo. Coolant absorbs heat in the block and heads, flows through the radiator, and cools as air passes the fins. A healthy radiator keeps temps steady, protects head gaskets, and helps the heater work properly on cold mornings.

• Controls engine temperature for performance and fuel economy
• Prevents overheating under load and in summer conditions
• Supports heater performance and overall cooling system longevity

For servicing, workshops typically pressure-test the system, check the cap, and inspect fins, tanks, and seams. Coolant should meet Nissan specifications, a quality ethylene-glycol premix (around 50/50) is standard. Older green long-life coolants are usually serviced about every 2–4 years or 40,000–60,000 km, extended-life coolants can run longer. Local conditions and the service book should guide intervals.

1. Inspect for leaks, staining, brittle hoses, and soft spots on the tanks.
2. Flush with a proper cooling system flush, not plain tap water, refill with demineralised/deionised water plus approved coolant.
3. Bleed air with the heater set to hot, top the overflow bottle to the correct mark after a heat cycle.
4. On autos, check the integrated trans cooler lines and watch for “strawberry milkshake” cross-contamination, many owners add an auxiliary ATF cooler for peace of mind.
5. Replace the cap, thermostat, and aging hoses/clamps while access is easy.

Typical replacement time varies by engine and accessories, but 1.5–3.0 hours is common. If temperatures creep up, fins are clogged or corroded, the cap won’t hold pressure, or there’s coolant loss with sweet-smelling steam, the radiator’s due. Using the right coolant, bleeding correctly, and keeping the fins clean will keep a 2002 Navara happy for the long haul.

Popular questions

What coolant should a 2002 Navara use?
Nissan-spec ethylene-glycol long-life coolant is recommended. Many 2002 vehicles originally used green long-life coolant, modern equivalents are fine as long as they meet or exceed Nissan requirements. Mixing coolant chemistries isn’t ideal—if changing type, perform a thorough flush first.

How often should the radiator be flushed or replaced?
A flush every 2–4 years or 40,000–60,000 km suits most 2002 Navaras running conventional green coolant. Extended-life coolants can go longer, but local conditions and service history matter. Replacement is needed if leaks, internal blockage, or tank degradation are present, or if repeated overheating occurs despite a sound thermostat and cap.

Does the 2002 Navara radiator include a transmission cooler?
Many automatic D22 models route ATF through a heat exchanger in the lower tank. When replacing the radiator, cap the lines to avoid contamination, renew the sealing washers, and consider adding an auxiliary cooler for heavy towing or hot climates.