Radiator Cap

Radiator Cap Testing and Replacement:

The radiator cap keeps your engine cool by sealing and pressurizing the coolant inside. It is designed to hold the coolant in the radiator under a predetermined amount of pressure. Once the pressure reaches its maximum, the cap opens the release valve and allows heat to escape. As the coolant expands when heated by the engine the cap contains the coolant in the cooling system and raises the boiling point of the coolant, thus protecting your engine in a wide range of temperatures.  Radiator caps are often overlooked and can saves thousands of dollars in damage if properly maintained.

To maintain your cooling system, it’s important that even the smallest components are working properly. If coolant is not moving efficiently throughout the system and your car is overheating, have your service advisor check the radiator cap as a starting point. A new cap is an inexpensive item and can prevent future engine damage. 

A Failing Radiator Cap can Lead to Expensive Repairs:

A malfunctioning cap will cause the coolant to boil, and your engine will not get the proper amount of cooling. If ignored long enough, the engine will overheat, leading to costly repairs. This simple and inexpensive part is well worth testing every few years.  Radiator cap replacement every few years is never a bad idea.

From a safety standpoint there is a slight risk, because an overheated engine might leave you stranded.  Never remove the radiator cap when an engine is overheating. Severe burns could result if you come in contact to pressurized boiling water.  There is high environmental impact, because leaking coolant is harmful for children, pets and other animals.