Parts for your 2014 Nissan Navara-Radiator

2014 Nissan Navara radiator – what it does and how to look after it

The 2014 Nissan Navara (primarily the D40, with some markets still offering D22) is factory‑equipped with a liquid‑cooled engine and a front‑mounted radiator, so the radiator is absolutely relevant to this model. This is confirmed by Nissan’s workshop/service manual cooling system section (CO) for the D40, which details radiator construction, pressure cap specs, fans and bleed procedures, and by Nissan parts catalogues listing radiator assemblies for YD25 diesel, V6 diesel, and petrol variants, including versions with an integrated automatic transmission fluid cooler. Sources: Nissan Navara D40 Series Workshop Manual, Cooling System (CO), model year 2014, Nissan FAST/Parts Catalogue for D40/D22, Haynes/Max Ellery repair manuals covering Frontier/Navara 2005–2014.

On a 2014 Navara, the radiator’s job is simple but vital: dump engine heat into the air so the ute runs at the right temperature, even when towing, idling in traffic, or slogging up a dune. Coolant leaves the engine hot, crosses the aluminium core of the radiator where it’s cooled by airflow and the fans, then heads back through the thermostat to keep everything in the sweet spot. On many autos, the radiator side tank also houses a small heat exchanger to temper ATF, which helps gearbox longevity under load.

For servicing, it’s worth staying a step ahead. Use a Nissan‑approved long‑life coolant (phosphated HOAT type) mixed with demineralised water if concentrate is used, and stick to the service schedule for change intervals. If the service history’s a mystery, a coolant replacement and system inspection is a smart reset.

• Check for leaks, staining, or sweet coolant smell around the tanks, crimps, and hose necks.
• Inspect fins for damage or clogging, gently clean bugs and grass seeds to restore airflow.
• Pressure‑test the cap and system, a tired cap can cause boil‑over and hard‑to-trace losses.
• Replace aged hoses and brittle clamps while access is easy, consider a new thermostat with a radiator swap.
• Bleed air properly after refilling to avoid hot spots and heater gurgle, follow the manual’s bleed points and warm‑up steps.

When replacing, choose a quality unit with the correct core size and transmission cooler configuration for the exact engine/gearbox. For heavy towing in Aussie and Kiwi summers, pairing a fresh radiator with a dedicated auxiliary ATF cooler is popular insurance. A well‑kept radiator keeps the Navara pulling hard, keeps EGTs in check indirectly, and staves off costly head gasket or transmission dramas.

Technical references used (no external links):

• Nissan Navara D40 Series Workshop/Service Manual, Cooling System (CO), 2014 model year.
• Nissan FAST/Parts Catalogue, Navara D40/D22, radiator assemblies and associated hoses/caps.
• Haynes/Max Ellery Frontier/Navara 2005–2014 repair manuals, cooling system sections.

FAQs

What coolant should a 2014 Navara use, and how often should it be changed?
Use a Nissan‑approved long‑life coolant (phosphated HOAT type, often the blue Nissan Genuine coolant). Change intervals vary by coolant type and service conditions, so follow the service manual or the bottle’s spec. Many owners in Australia and New Zealand opt for roughly 5‑year/100,000 km intervals for long‑life formulas, with shorter intervals if towing, off‑roading, or after any cooling system repair.

Always mix with demineralised water if using concentrate, and bleed the system properly to avoid airlocks. If the coolant is rusty, sludgy, or the history is unknown, a full flush and refill is the safest play.

Is the radiator connected to the automatic transmission on a D40?
On most 2014 D40 autos, the radiator has an integrated ATF cooler in a side tank. That’s normal and helps manage gearbox temps in daily driving. If the ute tows heavy or tackles long climbs in heat, many owners add an auxiliary cooler in series to keep ATF temperatures steadier and reduce thermal load on the radiator.

Whenever the radiator is replaced on an auto, reconnect the ATF lines carefully, check for leaks, and verify fluid level and condition after a proper road test.

What are the signs a Navara radiator needs replacing?
Watch for coolant loss with no obvious puddle, overheating at idle, crusty pink/white staining around the plastic tanks, swollen hoses, or a persistent sweet smell. Fins that are crumbling or clogged, or a radiator that fails a pressure test, are clear replacement triggers.

After any overheat event, have the cap tested and consider a system check for head‑gasket gases. A fresh radiator, cap, and hoses together often prevents repeat issues.