Parts for your 2012 Toyota Camry-Radiator cap

2012 Toyota Camry radiator-cap: purpose, service tips and when to replace

Technical sources confirm the 2012 Toyota Camry (XV50 series — ASV50/51 2.5L, GSV50 3.5L V6, AVV50 Hybrid) uses a pressurised radiator-cap mounted on the radiator’s upper tank. The Toyota Repair Manual for 2012–2017 Camry (Cooling System, “Radiator Cap Sub-Assembly — On-Vehicle Inspection”) specifies an inspection and pressure range, and the Toyota Electronic Parts Catalogue lists a radiator cap for these models (commonly referenced as P/N 16401‑31650, typical 108 kPa/16 psi). Major aftermarket catalogues also list direct-fit caps for the 2012 Camry (e.g., Stant 10238, Gates 31528), further verifying that a radiator-cap is fitted and serviceable on this vehicle.

On this Camry, the radiator-cap does a deceptively big job. It seals the cooling system and holds a set pressure so the coolant can run hotter without boiling, which keeps temperatures steady under the bonnet on long climbs and in summer traffic. Inside the cap is a spring-loaded relief valve that lets excess pressure bleed into the overflow bottle when things get hot, then a vacuum valve that draws coolant back in as the engine cools. That controlled flow protects hoses, the radiator core, and the water pump from pressure spikes and collapse.

As part of servicing a 2012 Camry, the radiator-cap should be checked whenever the coolant is inspected — always stone cold. A quick visual tells a lot: look for a cracked or flattened rubber seal, corroded spring, sticky valve, or scale on the seat. A workshop can pressure-test the cap with an adaptor, Toyota’s spec for relief opening typically falls in the 78–108 kPa range, and anything outside that is grounds for replacement.

• Common signs of a tired cap: coolant smell or stains near the neck, the overflow bottle overfilling or staying empty, random temp swings, collapsed upper radiator hose after cool-down, or slow cabin heat.

When replacing, use the correct pressure rating (about 108 kPa/1.1 bar/16 psi) and the right neck style for the Camry’s radiator. Genuine or quality equivalent is worth it. Wipe the filler neck clean before fitting, then tighten the cap fully to its stop. Many technicians swap the cap at coolant change intervals or around the 5–7 year mark, sooner if any symptoms show.

Safety note: never open the radiator-cap on a hot engine. Wrap a rag around the cap and crack it slowly only when the system is cool to avoid a scalding gush of steam and coolant.

Popular questions

What pressure radiator-cap does a 2012 Toyota Camry use?

Most 2012 Camry variants use a cap around 108 kPa (1.1 bar, 16 psi). Always match the rating and cap style to the vehicle’s build and radiator, check the service manual, parts catalogue, or the old cap’s marking to be sure.

How often should the radiator-cap be replaced on a 2012 Camry?

Inspect at every service and pressure-test if there are cooling complaints. Many workshops replace the cap during a coolant change or about every 5–7 years, or immediately if the seal is damaged or it fails a pressure test.

Is it safe to open the radiator-cap on a warm engine?

No. Only open the cap when the engine is completely cold. Opening a hot system can release pressurised steam and coolant, causing burns. If urgent, use a thick rag and release slowly — but best practice is to wait.