14 to 18 psi in all of the cooling system
You attach a pressure test kit to where the radiator cap goes, and pressurize the system. If it holds pressure, it's good.
First, remove the radiator cap. If car is still warm, turn radiator cap about 1/4 turn to relieve the pressure. Then, I find it much easier to remove the lower radiator hose from the radiator. It's much quicker than draining it from the petcock.
Actually if car is not running hot and temp gauge is staying within range then car is probably fine. I've seen a few that didn't have a lot of pressure on hoses because the flow of coolant was just that good. If you have too much pressure on a hose then you may need to worry.
On a 1994 Lincoln Town Car : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1997 Lincoln Town Car : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1994 Lincoln Town Car : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1994 Lincoln Town Car : The thread on cap on the engine coolant reservoir is the pressure cap / radiator cap
On a 1997 Lincoln Town Car : The thread on cap on your engine coolant reservoir is your pressure cap / radiator cap
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.
Call Around; Find A Radiator Shop or A Mechanic That Can Pressure Test Your Radiator. This Should Help
On a 1993 Lincoln Town Car : The threaded cap on the engine coolant reservoir is the pressure cap / radiator cap
It is not so much the temperature of the water but the pressure that the hot water produces. If you will look at almost any car radiator cap you will notice a warning that says something to the effect'warning contents under pressure. Do not remove when hot.'