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Engine radiator cap

4.9

1200 reviews

583824 sold

Do you experience these issues? 👇

🚨Engine temperature rises quickly even after a short drive?
🚨Coolant keeps dropping for no clear reason?
Radiator often overflows, leaks, or bursts the reserve tank?
🚨 Overheating warning, fan runs constantly but can’t cool down?
🚨 Engine feels weak, sluggish, and wastes fuel due to unstable temperature?

These are all signs of a cooling system losing pressure or leaking steam — and the most common cause comes from one small part that many drivers overlook: the radiator cap.

Radiator Cap

Heat Dissipation

Engine Coolant

Radiator

Engine

Heat Absorption

Reserve Tank

The radiator cap is not just a simple lid, but an important part that maintains the proper pressure inside the cooling system using a valve located on the back of the cap. By applying pressure to the coolant, it becomes harder for it to boil, which enhances the cooling effect. Furthermore, if the pressure gets too high, it also serves to protect the cooling system by relieving pressure and allowing some of the coolant to escape into the reserve tank.

What is a Radiator Cap?

Symptoms like these are signs of engine trouble!!

Deformation of the seal

Damage to the seal

Dirt on the seal

Rust and deposits

Side effects caused by a defective radiator cap
Due to "seal degradation/deformation," "seal damage," "dirt, rust, and deposits," etc. inside the radiator cap, the operation of the main pressure valve and the negative pressure valve worsens, which can lead to overheating.

※Please check the valve opening pressure before purchasing.

Valve opening pressure (k): 1.3K
Cap shape: Type A

Type A

Type B

Radiator Cap Confirmation Items

※Shape and pressure of the pressure valve on the genuine radiator cap (Too high a pressure may cause issues.)

※There is no protrusion at the tip of the back side of the cap.

※Length of the spring

There is a reason for it being chosen

This product is chosen
main points

With Water Temperature Gauge

Can always check the coolant temperature

Easy Installation

No special tools or knowledge required!

Durability â—Ž

Compatible with changes in heat and pressure

With Water Temperature Gauge

Because it has a water temperature gauge, you can always check the coolant temperature. This prevents engine overheating and allows the high power of a high-performance engine to be maintained stably.

Easy Installation

Easy installation simply by replacing the cap, no special tools or knowledge required. The metallic blue design also subtly enhances the appearance under the hood.

Durability â—Ž

It uses a silicone gasket and is made from high-quality materials. The valve opening pressure is 108kPa (1.1kgf/cm2), making it resistant to changes in heat and pressure, and able to withstand long-term use.

How to replace the radiator cap

"Just twist and turn to remove it!"

Radiator Cap

Loosen slowly. (If removed abruptly, hot water or steam may erupt, which is dangerous.)

1. Since there is a risk of coolant spraying out when removing it, wait some time after the engine stops before performing the work.
2. To avoid the risk of burns, cover the cap with a wrung-out rag or towel and then turn the cap.
3. When removing, turn counterclockwise. Once you feel two clicks/stops, pull straight up to remove it.
4. Align the new cap with the removed position and turn it clockwise. Once you feel two clicks/stops, the locking is complete. Confirm that the cap is in the same direction as the hose and is not floating/lifted, and the replacement is finished.

If the radiator cap is removed when the coolant temperature is high immediately after the engine stops, hot water or steam may erupt, posing a risk of burns.
Please perform the work after the engine has cooled down sufficiently and the water temperature has dropped.

My old cap was leaking, and the coolant kept running low with a slight burning smell after turning off the car. After replacing it with this new one, those problems disappeared completely. The engine runs smoothly, and no more bubbling sound. I’m really satisfied—it’s affordable and works great.

Like - Reply
33
1 hours ago 

Verified purchase

Sarah Wilson

My car used to overheat a lot, especially during long drives or heavy traffic. I thought it was a radiator issue, but it turned out the old cap couldn’t hold pressure anymore. After switching to this one, the temperature stays steady and safe. Now I can drive long distances without worrying about coolant overflow or boiling.

Verified purchase

Emily Davis

Like - Reply
18
16 minutes  ago 

I’ve been using this radiator cap for about three months now, both in city and highway driving. The radiator no longer swells when hot, and the coolant level stays consistent. It fits tightly and holds pressure even at high temperatures. Definitely worth the money.

Jose Maria Santos

Verified purchase

Like - Reply
41
1 hours ago 

I bought this cap just as a temporary replacement, but it turned out to work even better than the original one. The pressure stays stable, and there’s no coolant spilling out anymore. The engine runs smoother and even feels more fuel-efficient. I’ll definitely buy again when needed.

Like - Reply
33
1 hours ago 

Verified purchase

Sarah Wilson

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COMMITMENT AND SALE POLICY

NATIONWIDE DELIVERY
30 DAY RETURN
12 MONTH WARRANTY
GENUINE
Fast nationwide delivery, only 2-5 days to receive the goods.
Even after using the product and not satisfied
Very good product warranty policy
We do not sell fake or poor quality products

 Level 4, Cinema Complex, Glorietta 4, Ayala Avenue & Pasay Road, Ayala Center, Makati City, Metro ManilaPhilippines

Hotline:  09360487428 - 09812007325

Email: 3DLED@gmail.com

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ORDER SUCCESS

Thank you for your order. The product will be delivered to you within 3-5 days. Please pay attention to your phone, courier will contact you for delivery.