There are two important factors that govern the boiling point of the vehicle:
· The first is the saturation boiling point of the cooling fluid
· The second is the pressure that the fluid is under.
As a rough guide the boiling point of a cooling system is raised by 1OC per 5.5kpa of radiator cap pressure. From this we can see the boiling point of a cooling system with a 100kpa (15LB) radiator cap would be approximately 118OC.
A fact that is often overlooked when evaluating a cooling system is the internal running temperatures of the cooling fluid. It is not unusual to have coolant temperature exceeding 140OC in the hotter areas of the modern engine and a general coolant temperature in the block approaching 130OC. This means that even with a 100kpa radiator cap on the cooling system, water just isn’t up to the task and will actually be boiling in certain parts of the engine.
A good quality Glycol based coolant will compensate and protect the cooling system from the effects of accelerated hot spot corrosion and give additional protection against boiling.
A new CPC radiator cap will help prevent the effects of boiling as it keeps a constant pressure on the cooling system.
By testing your customer’s radiator cap and adequate amount of glycol in the cooling system you are not only offering your customer an added service you can also be increasing the, charge per vehicle, which adds up to extra profit for you.
CPC also has a Radiator Cap Pressure Tester (CPCPT-01) that correctly tests the blow off and reseal characteristics of our O.E Manufactured Radiator Caps made right here in Australia.