Parts for your 2013 Toyota Land cruiser-Radiator cap

2013 Toyota Land Cruiser radiator cap — what it does and when to replace it

Technical sources confirm the 2013 Toyota Land Cruiser (J200 Series) uses a radiator cap. The Toyota Land Cruiser 200 Series Repair Manual (Cooling System section), Toyota’s Electronic Parts Catalogue (EPC) for 2013 J200 variants, and the Owner’s Manual safety cautions all reference a pressure cap fitted to the cooling system. Depending on engine and market (e.g., 3UR-FE petrol or 1VD-FTV diesel), the cap sits on the radiator neck or on a pressurised reservoir under the bonnet.

On a 2013 Land Cruiser, the radiator cap isn’t just a lid — it’s a pressure regulator. By holding a set pressure, it lifts the coolant’s boiling point so the engine can run cool under load, tow, and tackle hot Aussie and Kiwi summers without boiling over. Inside the cap is a spring-loaded valve that vents excess pressure to the overflow bottle, plus a vacuum valve that draws coolant back as the engine cools. That pressure-and-recovery cycle keeps the system full, stable, and efficient.

Because it’s small and cheap, the cap is often overlooked — but a tired cap can cause hard-to-trace overheating, coolant loss, or premature hose and radiator damage. It’s good practice to have the cap pressure-tested during regular servicing, and to replace it if it won’t hold the specified pressure, the rubber seal is cracked or flattened, or there’s crusty buildup around the neck. Always match the correct pressure rating specified for your engine and market (you’ll see markings in kPa or bar on the cap).

• Never remove the cap when hot — wait until the system is cool to the touch.
• Inspect the seal and spring action, replace at the first sign of perishing, stickiness, or corrosion.
• Use a quality or genuine cap with the right pressure rating, don’t guess.
• If you’ve had overheating or a coolant change, test the cap as part of the diagnosis.

After fitting a new cap, top up with Toyota Super Long Life Coolant (pink) as specified, run the engine with the heater on to purge air, and recheck the level next morning. For hard-working Land Cruisers that tow or go off-road, many workshops in Australia and New Zealand recommend pressure-testing the cap annually and replacing it around the five-year/100,000 km mark, or sooner if it fails a test.

Does the 2013 Land Cruiser have a radiator cap or a sealed system?

It has a pressure cap. On most 200 Series, you’ll find it on the radiator neck under the plastic cover, some markets use a pressurised reservoir. Either way, the cap regulates system pressure and coolant recovery.

What pressure rating should the cap be?

Use the rating specified for your exact engine and market — it’s stamped on the cap (kPa or bar) and noted in service information. Avoid mixing ratings, an incorrect cap can cause overheating or stress the radiator.

How often should the cap be replaced?

Have it pressure-tested during routine services. Many workshops suggest replacement about every five years/100,000 km, or immediately if it fails a test, shows seal damage, or there’s evidence of coolant loss at the neck.