What do different pound radiator caps do?
A high-pressure radiator cap is used to raise the boiling point. This protects the system from boiling over at the top of the operating temperature range. High-performance engines also create more heat. Higher pressure caps can boost the boiling point even more.
What should the pressure be on a radiator cap?
Pressure Rating. Always replace the cap with the same pressure rating as recommended by the vehicle manufacturer. Each additional pound of pressure above the specified pressure increases the boiling point of the coolant by 1.4°C or 2.5°F. Generally caps are designed from 4PSI (30kPa) to 30PSI (205kPa).
How to tell if a Nissan radiator cap is genuine?
Enter your VIN for the most accurate results. Enter your VIN for the most accurate results. We offer a full selection of genuine Nissan Radiator Caps, engineered specifically to restore factory performance. Please narrow the Cooling Radiator Cap results by selecting the vehicle.
How many parts are in a lever radiator cap?
There are 7 part numbers available in lever style caps (refer to page 95 for range and pressures). For correct radiator cap testing a commercial type radiator cap and coolant system tester is required.
Is the radiator cap compatible with the cooling system?
As the radiator cap must be compatible with the vehicle cooling system, always refer to the vehicle application list to ensure the correct part number is selected. Failure to use the correct radiator cap may result in severe engine damage.
What does the pressure cap on a radiator do?
The part of a vehicle known as the “radiator pressure cap” contains 2 valves. Its purpose is to contain coolant in the radiator and ensure that the cooling system remains pressurized.
When do you Know Your radiator cap needs to be replaced?
Your mechanic can use a pressure tester to verify that your radiator cap is opening and closing at the correct cooling system pressure settings. If your cap fails any part of the test, it should be replaced. If you see rust inside the cap, or have any other reason to doubt the condition of your radiator cap, replace it.
Why does my car have a bad radiator cap?
Inadequate pressure means that the boiling point of your coolant gets much lower and unable to remove sufficient heat from your engine. Another possibility: Pockets of air in your cooling system can prevent coolant circulation and lead to overheating. This air can enter the cooling system through a radiator cap with a bad seal.
What to do if your Radiator is leaking coolant?
If you notice coolant fluid near the radiator or the radiator cap, then you clearly have leaky coolant. Check to see if the radiator has holes in it or if the cap looks worn or damaged. If so, then replace the cap.