What are the different types of radiator caps?

What are the different types of radiator caps?

there are four different types of cap: With lower seal only, with free-hanging vent valve (Partial-pressure, open system) With lower and upper seals, with free-hanging vent valve (Partial-pressure, coolant recovery system) With lower seal only, with spring-loaded vent valve (Full-pressure, open system)

What is the difference between a vented and non vented radiator cap?

Non-vented caps release pressure above their rating so your cooling system runs under pressure but not so much it bursts. Vented caps do the same thing but ALSO let coolant in the expansion/recovery/overflow tank back into the system when it all cools down.

What type of valve is the radiator cap?

But a radiator cap is not any ordinary cap. Though it seals the cooling system from the outside, the radiator cap is actually a two-way valve and a device to maintain system pressure. When liquids are heated sufficiently, they boil and vaporize, changing to a gas. Water boils at 212 degrees Fahrenheit.

Do all radiator caps fit the same?

Radiator caps can come in all shapes and sizes unique to your car’s radiator. Different vehicles have different systems and therefore work with individual pressures. A malfunctioning radiator cap may cause the engine to overheat at lower temperatures or prevent the coolant from returning to the engine.

What is the difference between a recovery and non recovery radiator cap?

A non recovery system does not have a recovery or expansion tank; therefore a non recovery cap (single seal) only allows the release of coolant and return of air to the system. A non recovery cap cannot be used on a recovery system.

What is a recovery style radiator cap?

Recovery Caps (double seal) In a sealed or recovery cooling system the recovery radiator cap (double seal) allows coolant to flow to and from the recovery or expansion tank, maintaining the integrity of the cooling system.

Is the radiator cap the same as the coolant cap?

How Does a Radiator Cap Work? The radiator cap is the gatekeeper of the cooling system. The cooling system uses pressurized coolant (also known as antifreeze) to take accumulated heat away from the engine. Having a functional radiator cap is critical to this process, as it maintains the proper amount of pressure.

Is there a universal radiator cap?

Radiator caps can come in all shapes and sizes unique to your car’s radiator. Different vehicles have different systems and therefore work with individual pressures.

Can a radiator cap make a car overheat?

When it’s working properly, the radiator cap helps normalize the pressure within the cooling system and keeps the engine cool. If the cap can’t maintain the correct pressure for your vehicle, the engine will start to overheat. An overheating engine could also be a symptom of air pockets within the cooling system.

What does a non vented radiator cap do?

This is the cap that actually goes on the radiator. A non-vented cap will not allow pressure to enter the system. This means that if you remove the cap and allow the pressure to be released, then you must wait until it has cooled back down before putting the cap back on.

When it comes to coolant caps, there is a surprisingly wide array of radiator caps. There are different ratings as well as vented and non-vented caps to name a few. So, how do these differ and which should you use on your car?

How much pressure can a radiator cap go up?

While you can get caps that go up to 20 pounds, this is not advised. Increasing the pressure too far beyond OEM specs can cause serious damage to your cooling system. If the pressure is allowed to build beyond the safe limit and not be released, then it can cause gaskets to fail or even blow out the wall of the radiator tank.

Are header tank caps vented or non-vented?

E-Type header tank caps are ALWAYS non-vented. This doesn’t mean what you might expect. Let’s take a look at what a cap looks like in cross section: