While you re in there check to make sure your coolant overflow tank is working properly.
Rad cap pressure.
The radiator pressure cap is a two valve part that holds coolant and keeps the radiator system pressurized.
The cap pressure rating has nothing to do with regulating your engine coolant temperature nor will it make your engine run cooler.
If you do not have the equipment to do the radiator cap pressure testing you can have it done at a shop.
The radiator cap releases the extra pressure by sending some coolant into the overflow tank.
When to check the radiator cap.
Let s take a pan of water and heat it up.
If you have recently bought a used vehicle the radiator cap is something that you will want to check.
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1 1 bar is roughly 15psi and 1 3 bar is around 18psi.
The water heats up and boils and 212 degrees.
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Replacing your radiator cap regularly can save your customer money at the pump and save wear and tear on your cooling sytem overall.
Most radiator pressure caps keep the system pressure at 16 psi so the engine coolant can get considerably hotter without the fear that it will boil off.
If there is no pressure in the cooling system the coolant will boil off.
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How much does the pressure raise the boiling point.
The top portion of the radiator cap will list the pressure rating.
Typically the pressure found inside the radiator is 16 pounds per square inch and the radiator cap is the piece that controls that pressure.
Always use a cap of the correct pressure for your cooling system.
You may find that it is beneficial to test the cap so that you can be sure that it is working properly.
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We get asked this question daily and it seems most people misunderstand what the pressure cap does.
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Abn radiator pressure tester kit and radiator cap tester adapter set coolant pressure tester kit coolant tester.
How to choose the right radiator cap by dimension pressure and size.
All modern automotive cooling systems are under pressure completely regulated by the radiator cap.
If the pressure is not constant your vehicle could run the risk of overheating.
And over time your fuel costs will also increase.
Radiator caps are critical to catch coolant overflow keeping your engine cooling system operating at optimal pressure and temperature and your vehicle operating at optimal performance.
If you have a bad radiator cap the coolant could get released too quickly and cause the reservoir to overflow.
