The level of insulation in your home will also play a role. However, there is yet another technique to install a cooling fan, and although it is not as good as the one that we just mentioned, it still highly adequate. Mark it down. You need to hard wire the radiator fan to a toggle switch on the dash in such a manner that the fan will shut off when the ignition key is off. If your fan has a shroud, then it will be able to evenly pull in air from all surfaces of the radiator instead of simply sucking in air from the small area located directly in front of the fan blades or from the middle of the blades and the radiator. Bowman has a business degree from Pennsylvania State University and was an officer in the U.S. Army (aircraft maintenance officer, pilot, six Air Medal awards, two tours Vietnam). Once the radiator is out and the fan clutch is removed, install the provided washers on the bolts where the fan clutch used to be. (Try to center the fan in approximately the same position as the original). The fan can also be turned off manually when cruising to extend the life of the fan. Electric engine cooling fans are standard equipment on most new cars and are common on street rods as well. The more current a fan draws, the more airflow it will have. Test the relay terminals for power with the ignition key off (use the voltmeter). Run a 16-gauge wire from the ground terminal of the relay to a good ground. When This TR6 electric fan project came along, I could not ignore the modern fan control circuits that are already in … A larger room requires either a higher capacity radiator or more units to be properly heated. The fan uses a relay in the fuse relay box under the hood. This is the one from the key that will be used to actuate the relay. Another factor to look at is the current draw. Flex-a-lite makes several fans that have an open shroud design to allow for airflow, which is ideal for this use. Attach the fan to the small area around the core Of the radiator where there is a metal lip that is approximately 1/4" to 3/8". The plug is typically mounted on the lower end passenger side, but may be connected at the center of the fan hub. Remove the radiator fan relay from the fuse and relay box on the fender well. 5. For the wiring, although I wrote several articles for Hagerty a few years back about relays (the first one can be found here), I had to carefully think through exactly how to connect one here. A fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. Mark this terminal on … However, in case you are able to tie your cooling fan to your radiator, do make sure that you do not secure it to the radiator’s core. Now all four terminals have been marked. Install the inside toggle switch where convenient. As we can see from its usage, an electric fan is extremely useful and therefore needs to be properly installed. Test the relay terminals for power with the ignition key off (use the voltmeter). When carrying out this idea, people have it in mind that they will turn the cooling fan on by themselves while the car is at rest or is only at the point of gaining some amount of speed after looking at the temperature gauge for some time. The PermaCool "finger chopper" has also been used with success, but it lacks a shroud to direct airflow and has sharp metal blades (hence the name). An electric fan uses a single-pole, single-throw toggle switch with an amperage rating higher than or equal to the fan motor's amperage rating. Rimsavers vs Rimblades – What Are the Differences? Turn the key on and check for a second terminal to have power. It should have a shroud that will let air flow correctly over the whole span of the radiator. The reason why you should drill holes in the fan shroud is so that you can later mount the brackets to the radiator with their help. Current Draw. 2) Take off the fan. This is the easiest part and only requires for you to take off 4 nuts. A lot of times, people tend to connect their cooling fans to the cockpit where the built-in thermostat of the car lies. Make sure to check out some of other Do-It-Yourself videos to keep your ride out of the shop and out on the track. Place a jumper wire across the terminal that had power with the key off and the terminal that was dead and did not go to ground. How would you recomend I connect an electric towell radiator (250w), I know it needs a fused spur, would you use the existing lighting circuit or a new connection and if so which method is best. Another option is to transplant a fan from another car. This is how you connect the new fan. The fan switch should be left on except when cruising. In this section, we’ll detail the entire process step-by-step for you. This is the terminal that actuates the relay. Mark this terminal on a piece of paper so it can be used later. Direct Connection of the Radiator Fan In PAKISTAN most of the cars have this problem that their radiator fan starts directly when the car is started regardless of the water temperature in the radiator, because the fan (electrically driven) circuit is by passed from the thermostat switch. Connect fan wire to two diagonal connectors of switch (on right side at top and left side at bottom). Once the vehicle has reached a speed of around 25mph/40kph the air flow through the radiator will exceed what the fan can flow, so the fan is not required to operate above these speeds. See all 8 photos. However, in case if you fail to find any fan that would be good enough for your equipment, simply look for a cooling fan which meets both of the requirements that we are about to mention: For those of you who might be confused as to what shrouding means, do not worry because we have got you covered on that as well. Take some zip ties and tie them to a stationary place in your engine bay! This is the fan hot wire. Do try and steer clear of fan mounting ties, which are made of plastic, because they will only work to damage the fins of the radiator and hence shift almost all of the weight and force on the core, which will subsequently damage it. Installing the fan: When installing electric cooling fans, it is important to cover as much surface area as possible. Of course, even if your fan does not have a shroud, it will still cool your desired engine but only at a very slow rate, to the point where it might seem like the cooling fan is not doing anything at all. 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