* If your radiator has a leak, don't use a granulated metal product to plug the leak unless it's to get you out of the desert and into a radiator shop. That stuff clogs more than just the leak.
* The drain petcock on many Mustang radiators is directly over the frame. When the system is drained the used coolant runs everywhere, starting your job out with a big mess. Stick a length of hose over the petcock end and run it to the drain pan.
* Want to add coolant to your radiator, but don't have a funnel? Just lay the coolant jug flat before pouring, and there's no mess.
* When checking for proper V-belt tension, the belt should deflect less than an inch on its longest span. Too loose, and you could throw the belt or have an annoying squeal. Too tight, and you could damage the pulley shaft or bearing of the accessory you are driving and even cause fluid leakage.
* Most classic Fords do not have a catch can or overflow bottle. One can be purchased or made from a simple plastic container or bottle. This prevents coolant overflow from entering the ground and contaminating the soil. you will also have to top the cooling system off less as the overflow system will allow the coolant to return to the radiator once the radiator cools off.
* If you are using the factory metal fixed-blade fan, make sure you don't have the fan on backwards. It is easy to do. Look for the word "FRONT" on the fan or inspect the pitch of the fan blade to ensure it is pulling air from the radiator when spinning.
* Don't obstruct airflow to the radiator. Extensive lighting, custom grille work, and other cooling items in front of the radiator (A/C condenser, aftermarket oil coolers, and so on) all contribute to lack of airflow across the radiator core. Make sure you are getting the maximum amount of airflow to the radiator, and that it is going through the radiator core and not around or over it.