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The coolant system has to be under pressure to operate properly. For each pound of pressure the system is able to go 3 degrees above boiling point. Lets use water and water only for this example. Water boils at 212 degrees, if you have a 15 pound radiator cap then you can raise the temperature of the water to 257 degrees. 15 pound cap X 3 degrees per pound equals 45 degrees and add that to the boiling point of 212 degrees. With coolant, the numbers are slightly higher. You can't have pressure on one hose and not the other. It is a closed loop system. So if you have engine with 180 degree thermostat, that is too close to boiling point. Adding the 15 pound cap moves the boiling point to 257 degrees that way you have room to move the temperature up. It is similar to a pressure cooker.
What else can I help you with?
What would cause Both radiator hoses to collapsed?
Radiator cap
What would cause a radiator water leak from under the hood if not hoses leaking?
maybe your radiator is broken and you need to get a new one or just get a reparation if the radiator starts leaking when is in use it may be leaking because of the pressure of the water.
What would cause pressure in the radiator besides thermostatalready replaced head gasket?
radiator cap
What would cause a jeep Cherokee radiator upper and lower hoses to collapse?
If they are collapsing after the engine is off, the rad cap is bad. The cap needs to allow pressure back in as the engine cools off.
What would cause a water leak in your 98 Le Sabre?
Where is it leaking from? Could leak from the radiator, hoses, or water pump.
How would a radiator cap cause a leak?
A radiator cap would not cause a leak! However, if the radiator cap is holding pressure, other weak parts could signal issues in need of attention.
What would cause the engine to overheat in a 1986 1.8L Hyundai excel?
low coolant ,froze thermostat ,leaks in hoses ,radiator
What would cause a 1997 Intrepid to keep overheating even after replacing the water pump and thermostat?
Low coolant? system "airbound"? Hoses collapsing under pressure clutch or cooling fan not working? Defective radiator cap?
What would cause your 1999 Dakota to all of a sudden start leaking coolant?
sounds like water pump.check radiator hoses as well
Why would the radiator hoses be very firm when there is no thermstat?
Without a thermostat, the coolant continuously circulates through the radiator hoses, causing them to heat up and expand. This can make the hoses feel very firm due to the increased pressure from the heated coolant. The thermostat helps regulate the flow of coolant to maintain a consistent temperature in the engine.
What would cause your radiator cap to blow off?
the radiator cap is a pressure regulating device if it is blocked for some reason the pressure in the cooling system could blow it off
Why would your 1996 Oldsmobile aurora overheat?
Low coolant? Cooling fan not working? Thermostat not opening? Radiator plugged or restricted? System Airbound? Hoses collapsing under pressure? Defective radiator cap?
