If you do not have the equipment to do the radiator cap pressure testing, you can have it done at a shop. If the cap fails to hold the rated pressure, replace the cap. As the coolant heats up, it expands. And over time your fuel costs will also increase. Typically, the pressure found inside the radiator is 16 pounds per square inch and the radiator cap is the piece that controls that pressure. Radiator Caps & Necks. Some people think this cap is broken when they first see it because the part that goes into the fill pipe to seal the system “wobbles.” This is a vented coolant cap. Determine the amount of space you have available for a radiator. If the valve in the radiator cap doesn’t open at the right moment to bleed the excess pressure, you can damage the cooling system as it will end up holding more pressure than it was designed for. Let the vehicle sit with this pressure for 20 – 30 minutes. MEASURE ONLY THE CORE to determine the size of the radiator. The first is called a DOWNFLOW. (think of the cap rating in pounds per square inch, and the force pulling the tank apart as the PSI times the square inches of tank surface) squirrel, Apr 16, 2017. Member. The radiator cap holds pressure on the cooling system to raise the boiling point of the coolant. MEASURE ONLY THE CORE to determine the size of the radiator. OVERALL HEIGHT. Before measuring a radiator, make sure it is in the upright position with the inlet and outlet connection facing you. Sort by . Minesafe radiator caps come in a variety of sizes to suit a full range of mining vehicles and equipment. Why do you want pressure in the cooling system? If the pressure is not constant, your vehicle could run the risk of overheating […] Install the cap onto the radiator cap adaptor supplied with the tester set. Remember, more space means larger radiators, and larger radiators can give off more heat. Nobody does it better than NPD! Only the core is measured to determine the width of the radiator, not the side rails. 100 Pieces (Min Order) 12 … SHARE POST #2. lothianwilly71 and lothiandon1940 like this. Profile Page. In both diagrams, core height is always the first dimension … There are several different sizes and shapes of radiator cap, and several sizes and shapes of adaptors. How about replaced your radiator cap? Step 7: Buy a new radiator cap from the auto parts store. Contact Supplier. from North East England. The core is the central part of the radiator (between the tanks and the side-pieces) and consists of parallel rows of tubes and fins. OVERALL DIAMETER. radiator cap (double seal) allows coolant to flow to and from the recovery or expansion tank, maintaining the integrity of the cooling system. You don’t need to wait five minutes, though. Finance avail. Replacement Baseboard Radiator Covers; Sign in; Your Cart is Empty; Measure Your Baseboard Heaters How to measure baseboard heaters: Step 1 HOW TO MEASURE Always measure left to right, and twice for accuracy. When was the last time that you changed an oil filter? It explains the different types of caps and their respective features and benefits. US $0.18-$2.80 / Piece. You may find that it is beneficial to test the cap so that you can be sure that it is working properly. PART #. Let’s take a pan of water and heat it … In both diagrams, core width is illustrated by measurement 'B'. 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. The cap pressure rating has nothing to do with regulating your engine coolant temperature, nor will it make your engine run cooler. Pressure test the cap with a professional pressure testing device (follow manufacturer’s instruction). The easiest way to measure the thickness, is to place a small piece of wire between the fin so each end is flush from one side to the other. Radiator cap pressure is something that you will have to keep an eye on to ensure that your car is not going to overheat. Radiator caps are critical to catch coolant overflow, keeping your engine cooling system operating at optimal pressure and temperature, and your vehicle operating at optimal performance.