Parts for your 2020 Toyota Camry-Radiator cap

2020 Toyota Camry radiator cap — what it does and how to look after it

Yes, a radiator cap is relevant on the 2020 Toyota Camry. Technical sources indicate the XV70 Camry (2018–2022) uses a pressurised cooling system with a “radiator cap sub‑assembly”. On this model, the pressure cap is fitted to the pressurised expansion tank rather than directly on the radiator, but it performs the same job. References: Toyota Repair Manual (TIS) Cooling section (radiator cap inspection/pressure test), Toyota Genuine Parts catalogue entries listing a radiator cap for 2020 Camry, and the 2020 Camry Owner’s Manual cooling-system cautions about not removing the radiator cap when hot. Typical spec is a 1.1 bar (about 108 kPa) cap.

The cap’s purpose is to keep the cooling system at a set pressure so the coolant’s boiling point is raised, helping the engine run at the right temperature without boiling over on hot days or big hills. It also lets expanding coolant vent to the tank and draws it back in as the engine cools, thanks to a two-way valve inside the cap. A healthy cap protects hoses, the water pump, and the radiator by keeping pressure where it belongs.

As part of normal servicing, it’s smart to inspect or test the radiator cap at least annually:

• Check the rubber seals for cracks or flattening, and make sure the spring-loaded valve moves freely.
• Pressure-test the cap with a cooling-system tester, it should hold its rated pressure (around 1.1 bar) and release cleanly.
• Replace the cap if it fails testing or if age/wear is evident. Many owners opt to renew it every 5 years or 100,000 km as inexpensive insurance.

Signs the cap may be on the way out include coolant loss with no visible leaks, the overflow bottle overfilling or staying empty, hoses collapsing as the engine cools, or intermittent overheating.

When replacing the cap on a 2020 Camry, only do it with the engine stone cold. Wrap a rag around the cap and crack it slowly to bleed off any residual pressure. Inspect the filler neck on the tank, wipe away grit, and fit a quality 1.1 bar cap (Toyota SLLC-compatible). Seat it squarely and tighten until fully home. After replacement, confirm the coolant level in the tank is at the “FULL” mark with Toyota Super Long Life Coolant (pink, pre-mix) and top up if needed. If you’ve opened the system elsewhere, bleed air per the service procedure to avoid hot spots.

Popular questions

Where is the radiator cap on a 2020 Toyota Camry?
On the XV70 Camry the pressure cap sits on the pressurised expansion tank, not on the radiator itself. Pop the bonnet and look at the coolant tank on the passenger side, the metal-sprung cap on that tank is the radiator cap for service purposes.

What pressure radiator cap does a 2020 Camry use?
Most 2020 Camry variants use a 1.1 bar (about 108 kPa) cap. Always match the rating on the original cap or check the under-bonnet label and service data to confirm your exact spec before buying a replacement.

Is it okay to drive if the radiator cap is faulty?
Not recommended. A weak or stuck cap can cause overheating, coolant loss, or hose collapse. If you suspect the cap is failing, replace it before driving far — it’s a low-cost part that protects much more expensive components.