So, Bad rad caps can cause a lot of cooling system problems.

You may think, the only purpose for rad caps is for adding coolant to the radiator, but it is not.

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So, What are the common parts of the cooling system:

  • Cooling passages inside the engine block and heads
  • The water pump to circulate the coolant
  • A thermostat to control the temperature of the coolant
  • The radiator to cool the coolant
  • A radiator cap to control the pressure in the system
  • Some plumbing consisting of interconnecting hoses

So, A cooling system works by sending a liquid coolant through passages in the engine block and heads. Consequently, As the coolant flows through these passages, it picks up heat from the engine. The heated fluid then makes its way through a rubber hose to the radiator in the front of the car.

So, As it flows through the thin tubes in the radiator, the hot liquid is cooled by the air stream entering the engine compartment from the grill in front of the car. Once the fluid is cooled, it returns to the engine to absorb more heat. Finally, The water pump has the job of keeping the fluid moving through this system of plumbing and hidden passages.

Maintaining the antifreeze coolant is an important aspect of a healthy cooling system. This involves one of the most basic components of the automobile, the radiator pressure cap.

The cap keeps cooling system pressure at the recommended pressure rating for the car. Each pound of pressure exerted on the cooling system raises the boiling point of the coolant by 3 degrees at sea level. This allows the cooling system to operate at a higher temperature before boiling over, increasing the system’s efficiency and reducing emissions.

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