The cap is faulty, replace it.
There should be 15-17 psi in the cooling system when warmed up under normal operation. Any more than that the radiator cap should release.
You should have pressure in the cooling system. The radiator cap is marked as to how much pressure it is designed to hold, usually 15 to 17 lbs.
With a radiator cap pressure tester. The tool usually comes along with a cooling system pressure test kit.
The PSI (Pounds per Square Inch) rating is what pressure the radiator cap is designed to hold up to but not exceed in the cooling system.
The relief vent in the radiator cap is not working, replace the radiator cap.
The cap is faulty, replace it.
Probably an old hose that should have been replaced. Replace the hose, clamps and the radiator cap. Inspect the other hoses. The radiator cap should release pressure in excess of psi noted on cap, usually 15 to 17 psi.
Check valve in radiator cap malfunction, replace radiator cap.
GO AWAY YOU ARE WEIRD GO AWAY YOU ARE WEIRD
You likely need to replace your radiator cap - the rubber seal in the cap is worn.
Replace the cap with a new one. Any auto parts store will have that.
take the cap off and check this look under the cap and see if the rubber seal is broken or it looks worn but if in doubt replace it a mechanic has tool for connecting to radiator to check cap pressure. but if you think radiator cap is the problem, just buy a new one they cost under 10 bucks. if that is the problem, it is sure cheaper than going to a mechanic
Either the cap is defective or too much pressure is building up in the system. I would replace the cap is it does not appear to be overheating. answer you have a defective radiator cap replace with a new one with same pressure rating as old one
It should be printed on the radiator cap. Most are around 16 psi.It should be printed on the radiator cap. Most are around 16 psi.
To flush a radiator on an Acura RL you will need to make sure the care is level. Remove the radiator cap from the radiator under the hood. Place a bucket under the radiator and remove the radiator plug. This is a white plug located on the bottom of the radiator which may be hidden by the splash guards at the front of the vehicle. After the radiator fluid has been drained replace the white radiator plug. Refill the radiator with coolant and replace the radiator cap.
generally most radiator caps should hold 15psi, if they drop the cap is no good.