No Pressure Radiator Cap

If there is no pressure in the cooling system the coolant will boil off.

No pressure radiator cap.

My coolant shows no sign of oil. The cap on the right has been mangled to do that. The old mopars originally had no pressure radiator systems. Cost was only 3 or 4 dollars.

Let s take a pan of water and heat it up. The cap pressure rating has nothing to do with regulating your engine coolant temperature nor will it make your engine run cooler. We get asked this question daily and it seems most people misunderstand what the pressure cap does. Find radiator caps with 0 psi maximum pressure psi and stant cap logo and get free shipping on orders over 99 at summit racing.

The easiest way to fix this problem is with a new radiator cap. The problem is my pepcock on my brand new radiator is leaking. Pressure testing the radiator. On the other hand if the pressure was allowed to increase above 16 psi the cooling system including the hoses and.

So i filled up the radiator. High pressure caps are made for use on race cars only. However you want to be sure that the problem is the cap and not in another part of the system. High pressure caps are available for open and closed cooling systems.

High pressure caps are available in pressures ranging form 19 to 32 pounds. I thought that it might be because the radiator was only 1 2 full of water. Visually inspect that cap to make sure the spring moves freely and there is no debris or corrosion under the cap. The water heats up and boils and 212 degrees.

It might simply be that the cap is no longer holding the pressure correctly. No pressure but it gets up to. So i replaced the radiator cap. Sometime back i found one available at napa stores they may have to order it in from the warehouse but last i knew they had them.

I m not losing coolant. They should not be used on passenger cars. The outer seal seals the cap to the radiator. I bleed the system.

When i removed the radiator cap there was no pressure on it. I m at my wits end. 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. To make a no pressure cap you want to remove the inner seal and fully tighten the cap so the outer seal keeps the coolant in the radiator and the overflow tank.

Sometimes its hard to find a correct radiator cap. Now i don t know what to do. You will also want to check the cap if you begin to have problems with the cooling system. My dipstick shows no sign of coolant.

I installed the stat spring side down so thats okay. This may help you find leaks or determine if the radiator cap has gone bad. If you have a radiator pressure tester then you can inspect the cooling system on your own.