Parts for your 2016 Nissan Pathfinder-Radiator cap

2016 Nissan Pathfinder Radiator Cap — What It Does and When To Replace It

Based on technical references, the 2016 Nissan Pathfinder (R52, VQ35DE) uses a pressure radiator cap. The Nissan factory Service Manual for this model (CO – Cooling System) details radiator-cap inspection and pressure checks, and reputable parts catalogues from major cooling-system manufacturers list a compatible pressure cap for the 2013–2016 Pathfinder. So yes, a radiator cap is fitted and very much relevant to this vehicle.

The radiator cap isn’t just a lid, it’s a calibrated pressure valve that keeps the coolant system sealed to a set pressure (around 0.9 bar/13 psi as specified for this platform in Nissan service literature). By raising the system’s boiling point, it helps the Pathfinder manage heat on long hauls, towing, or city traffic without boiling over. It also controls coolant recovery to and from the overflow reservoir as the engine heats and cools, keeping the system topped and air-free.

For owners and fleets in Australia and New Zealand, treating the radiator cap as a service item is smart. Age, heat cycles, or a perished rubber seal can let pressure drop, which can show up as higher temps, coolant loss, or hoses that feel oddly soft after a drive. During servicing of the 2016 Nissan Pathfinder’s cooling system, technicians typically check the cap’s seal, spring tension, and relief pressure with a tester, and replace it if it can’t hold spec.

Good practice under the bonnet includes:

• Inspect the cap at every coolant change or annually if towing or driving in hot conditions.
• Pressure-test and replace if it won’t hold the rated pressure or shows corrosion, cracked seals, or a sticky valve.
• Only remove the cap when the engine is cold, use a cloth and open slowly to release any residual pressure.
• Refit a quality cap that matches the OE pressure rating for the R52 Pathfinder, and bleed air per the service procedure.

Many workshops recommend replacement about every 4–5 years or 80,000–100,000 km, sooner if symptoms appear. Pairing a fresh, correct-pressure cap with the proper Nissan blue long-life coolant, clean hoses, and a clear overflow line helps the Pathfinder stay cool, efficient, and reliable on Kiwi and Aussie roads.

Popular questions

Where is the radiator cap on a 2016 Nissan Pathfinder?
It sits on the radiator filler neck at the front of the engine bay, typically under the plastic top shroud near the bonnet latch area. The translucent reservoir bottle nearby is not the pressure cap location. Remove the cover carefully to access the cap when the engine is cold.

What pressure rating should the cap be?
The R52 Pathfinder uses a pressure cap around 0.9 bar (about 13 psi), as specified for this platform in Nissan service information. Always match the OE pressure rating, using a cap that’s too low can allow overheating, and too high can stress hoses and the radiator.

How often should the radiator cap be replaced?
Have it inspected at each coolant service and replaced every 4–5 years or 80,000–100,000 km, or immediately if it fails a pressure test, shows damaged seals, or there are signs of coolant loss or overheating. It’s a low-cost item that protects far pricier components.