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Wheel Movers: Leading Radiator Cap Manufacturer & Supplier in India

Wheel Mover is a prominent automotive part manufacturer and supplier in India, specializing in the production of high-quality radiator caps. With a strong commitment to excellence and client satisfaction, Wheel Mover has become a trusted name in the industry. Their extensive range of radiator caps caters to various automotive applications, ensuring optimal performance and durability. As a leading radiator cap manufacturer in India, Wheel Mover utilizes advanced manufacturing techniques and adheres to stringent quality control measures to deliver products that meet or exceed industry standards.

What is Radiator Cap?

A radiator cap is a crucial component of a vehicle's cooling system. It is designed to seal and pressurize the radiator, allowing the engine to maintain the optimal temperature for efficient operation. The radiator cap is located on top of the radiator and acts as a gateway between the cooling system and the outside environment.

Types of radiator Caps

  • Standard Pressure Cap: This is the most common type of radiator cap found in most vehicles. It functions by sealing the radiator and maintaining a specific pressure in the cooling system, typically around 13 to 16 pounds per square inch (psi). The standard pressure cap also acts as a safety valve, allowing excess pressure to escape if the coolant temperature rises too high.

  • High-Pressure Cap: High-pressure radiator caps are designed to withstand greater pressure levels in the cooling system. They are commonly used in performance vehicles or those with modified cooling systems that require higher pressure to prevent coolant from boiling at higher temperatures. These caps usually have pressure ratings above 16 psi, such as 18 or 20 psi.

  • Safety Pressure Cap: Safety pressure caps, also known as recovery caps or safety release caps, incorporate a pressure relief valve. If the pressure in the cooling system exceeds the cap's specified rating, the valve opens to release excess pressure and prevent damage. Safety pressure caps are often used in systems with pressurized coolant recovery tanks.

  • Lever-Type Radiator Cap: Lever-type caps have a lever mechanism attached to the top, making them easier to grip and remove. These caps typically feature a pressure relief valve and are designed for quick and easy access during coolant filling or system inspections.

  • Twist-Type Radiator Cap: Twist-type caps require twisting to remove or install them. They are commonly found in older vehicles or specific models where a lever-type cap is not used.

  • Coolant Recovery Tank Cap: Some vehicles have a separate coolant recovery tank, also known as an overflow tank or expansion tank. Instead of a cap directly on the radiator, these systems have a specific cap for the recovery tank. The recovery tank cap ensures a sealed system and allows coolant expansion and contraction as needed.

  • Specialty Caps: In addition to the standard types mentioned above, there may be specialty radiator caps designed for specific vehicle models or cooling system configurations. These can include caps with unique pressure ratings, thread sizes, or integrated features to accommodate specific cooling system requirements.

Functions of Radiator Cap

Pressure regulation: The radiator cap is designed to maintain the ideal pressure in the cooling system. It contains a pressure valve that opens when the pressure exceeds a predetermined limit. This allows coolant to flow into an overflow reservoir, preventing excessive pressure buildup that could damage the cooling system or cause leaks.

Coolant retention: The radiator cap ensures that the coolant remains inside the cooling system by creating a sealed environment. It prevents the loss of coolant due to evaporation and keeps air from entering the system. This helps to maintain the overall efficiency of the cooling system.


Boiling point elevation: The radiator cap also raises the boiling point of the coolant by increasing the pressure inside the system. As the boiling point of a liquid increases with pressure, the elevated pressure provided by the cap helps to prevent coolant from boiling and turning into vapor, even at higher temperatures.

Coolant circulation control: The radiator cap plays a role in regulating the flow of coolant through the cooling system. It allows coolant to flow from the radiator to the engine when the engine is running and the temperature is within a safe range. When the engine is turned off and begins to cool down, the cap prevents coolant from flowing back into the radiator, keeping it in the engine to aid in the gradual cooling process.


Detection of cooling system issues: Modern radiator caps often feature a built-in pressure relief valve and a pressure gauge. These additional features can help detect potential problems within the cooling system. If the pressure exceeds the normal range, it may indicate a malfunctioning radiator cap or other issues such as a faulty thermostat or a blocked radiator.


Prevention of air pockets: Air pockets or airlocks in the cooling system can disrupt the proper circulation of coolant and lead to localized overheating. The radiator cap helps to prevent the formation of air pockets by creating a sealed system and allowing coolant to expand and contract as needed.

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