Parts for your 2013 Toyota Crown-Radiator cap

2013 Toyota Crown radiator cap — what it does and how to look after it

Based on technical sources, a radiator cap is absolutely relevant to the 2013 Toyota Crown. The Toyota Electronic Parts Catalog (EPC) lists a Radiator Cap Sub-Assembly for the S210-series Crown (from late 2012), typically a 1.1 bar (108 kPa) cap such as P/N 16401‑20353. Toyota repair manuals for the 2GR-FSE/4GR-FSE/2AR-FSE engines include the procedure “Inspect Radiator Cap Sub‑Assembly,” and the Owner’s Manual cautions not to remove the radiator cap when hot—clear indicators that a pressure cap is fitted and serviceable on this model.

On the 2013 Crown, the radiator cap sits on the filler neck of the radiator and seals the cooling system so it can run under pressure. That pressure bumps up the coolant’s boiling point, helping the Crown keep its cool on long motorway runs and Aussie–Kiwi summer days. The cap also has a vacuum valve that draws coolant back from the overflow bottle as the system cools, keeping air out and hoses from collapsing.

Good servicing practice is to check the cap at each coolant service. Look for cracked or hardened rubber seals, a sticky or weak spring, and crusty deposits on the seat. A tired cap can cause gradual coolant loss, overheating at speed, or hoses that look sucked-in after a cold start. If any of that shows up, fit a new cap with the correct pressure rating (1.1 bar/108 kPa is standard for most S210 Crowns—confirm by VIN or under-bonnet label).

Replacement is simple but only ever do it stone-cold. Twist the old cap off slowly to release any residual pressure, wipe the filler neck clean, and install the new cap until it clicks home. If coolant has been lost, top up with Toyota Super Long Life Coolant (pink) premix and bleed air per the repair manual.

For a preventative approach, many workshops suggest replacing the cap every 4–5 years or 80–100,000 kilometres, especially in hotter climates or where the vehicle sees lots of stop–start city duty. Sticking with a genuine or quality OEM-spec cap avoids under‑ or over‑pressurising the system.

• Only remove the cap when the engine is cold.
• Match pressure rating (about 108 kPa / 1.1 bar for most 2013 Crowns).
• Inspect seals and the spring at each coolant service.
• Keep the filler neck clean to ensure a proper seal.

Popular questions about the 2013 Toyota Crown radiator cap

What pressure rating does the 2013 Crown’s radiator cap use?
Most 2013 Toyota Crown variants use a 1.1 bar (108 kPa) cap. That rating is listed in Toyota’s EPC for the S210 series and aligns with the cap inspection specs in Toyota repair manuals. Always confirm against the vehicle’s VIN or the original cap stamp to be safe.

Where is the radiator cap on a 2013 Crown?
It’s mounted on the radiator filler neck at the front of the engine bay. The coolant overflow bottle is nearby and is non‑pressurised. Only remove the cap when the engine is completely cold.

How often should the radiator cap be replaced?
There’s no hard interval, but checking it at every coolant change is smart. Replace at the first sign of seal damage, weak spring tension, staining, or if the cooling system shows odd behaviour. As a preventative, many techs opt for 4–5 years or 80–100,000 kilometres.