cooling

Radiator Cap

for 2012 Toyota Camry 2.5L I4 · FWD

Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Mechanic · 20+ years

Difficulty

Easy

Time

6 min

Tools

Steps

✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.

This procedure covers the replacement of the radiator cap on a 2012-2017 Toyota Camry with a 2.5L I4 engine, a simple maintenance task that requires no coolant draining.

Warnings

⚠️Never remove the radiator cap when the engine is hot. The cooling system is pressurized and removing the cap can cause severe burns from escaping steam and coolant.

⚠Allow the engine to cool completely before attempting this procedure, ideally letting the vehicle sit for at least 2 hours after running.

Tools required

Clean rag or shop towelEssential

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Parts

Radiator cap × 1 — Use OEM specification - Toyota 16401-31310 or equivalent

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Ensure engine is completely cold to the touch
Park vehicle on level ground
Open hood and secure with prop rod
Locate the radiator cap on top of the radiator at the front of the engine bay

Procedure

1
Verify Engine Temperature
Place your hand near (not on) the radiator and upper radiator hose to confirm the engine is completely cool. If any heat is detected, wait longer before proceeding.
2
Release System Pressure
Place a clean rag or shop towel over the radiator cap. Slowly turn the cap counterclockwise to the first stop (approximately 1/4 turn) and wait for any residual pressure to release. Listen for hissing sounds which indicate remaining pressure.
3
Remove Old Radiator Cap
Once all pressure has been released, press down on the cap while continuing to turn counterclockwise until it can be lifted off. Remove the cap and set aside. Inspect the cap's rubber seal for cracks, deterioration, or loss of flexibility.
4
Inspect Radiator Filler Neck
Examine the radiator filler neck for damage, cracks, or corrosion on the sealing surface. Wipe away any debris or old coolant residue with a clean rag. Check coolant level and condition while cap is removed - coolant should be pink and fill to the base of the filler neck.
5
Install New Radiator Cap
Verify the new cap's pressure rating matches the original (typically 13.0-18.1 psi or 0.9-1.25 bar for this model). Position the new cap on the radiator filler neck, ensuring proper alignment. Press down firmly and turn clockwise until it stops at the fully locked position. You should feel it click or seat firmly into the locking tabs.

Reassembly

Ensure radiator cap is fully seated and locked in place
Close hood securely

Verification

Start the engine and allow it to reach normal operating temperature while monitoring for coolant leaks around the radiator cap
Verify the cap remains properly seated during warm-up and that no coolant sprays or leaks from the filler neck
After engine reaches operating temperature and cooling fan cycles on, turn off engine and allow to cool, then recheck cap for proper seal
Check coolant overflow reservoir to ensure coolant level is between MIN and MAX marks

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