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How to Pressurize a Radiator System?

Published in Automotive Maintenance 2 mins read

To pressurize a radiator system, you generally use a hand pump designed for this purpose. Here's a breakdown of the process:

  1. Attach Hand Pump: This involves connecting the quick-connect fitting of the hand pump to the radiator's pressure testing adaptor.
  2. Operate the Pump: Rapidly operate the hand pump to increase the pressure within the cooling system.
  3. Monitor Pressure: Be extremely careful not to exceed the maximum pressure specified for your vehicle's cooling system. This information is crucial to prevent damage.

The specific pressure your system requires is typically found in your car's workshop manual and often falls within the range of 12 to 15 psi. Exceeding the recommended pressure can damage hoses, seals, and even the radiator itself.

Why Pressurize a Radiator System?

Pressurizing the radiator system is primarily done to check for leaks. The increased pressure will force coolant to escape through any existing openings, making them easier to identify. This is a common diagnostic procedure when troubleshooting issues such as overheating or coolant loss.

Safety Considerations:

  • Always consult your vehicle's service manual for the correct pressure specifications.
  • Wear safety glasses to protect your eyes from coolant spray.
  • Work in a well-ventilated area.
  • Never pressurize the system beyond the recommended limit.
  • If a major leak is detected, immediately stop pressurizing the system.