Step #2: Track The Leak’s Source. To find where a coolant leak comes from, your best option is an ultra-violet (UV) leak detection dye, which is poured directly into the radiator. Once the dye circulates through the cooling system, any leaks will illuminate under a black light. Puddles of Coolant. The most obvious sign of a radiator leak is a puddle of antifreeze underneath the car. Of course, not all puddles indicate a coolant problem, and not all coolant pooling is related to the radiator itself. Take a close look at the puddle. If it’s got a green, yellow or blue tinge, it’s most likely coolant, but you can One option is to use egg yolks. This may sound odd, but the eggs will congeal enough to seal tiny leaks, and the effect should last long enough for you to get ahold of a better option, like AlumAseal. Just note that you have to separate the egg whites from the yolks of about four eggs, and then pour just the yolks into the cooling system. 5. Bad Heater Core. The heater core heats the cabin with the warm coolant from the motor. Some of the coolant moves through the heater core in the dashboard. It only takes a leak that’s the size of a pinhole to start spraying coolant out of the vents into the cabin when the heat is running. In the video, the YouTubers behind the channel try to answer the question of whether you can fix a hole in a radiator with an egg and more. Calling them "old farmer's trick", the YouTubers test Permatex makes a radiator repair kit BUT, it requires sanding and cleaning the nylon/fiberglass plastic before applying the patch and epoxy. That spot is going to be really tough to patch since it's leaking out of the gasket. You can try an epoxy, but the risk is that it fails while driving and you overheat the engine and destroy your head gasket. In this video I repair a leaking radiator valve nut by wrapping some PTFE tape around the olive. It is quite common for radiator valves to leak via the nut/o Uncategorized. You can use eggs to patch small holes and temporarily plug leaks if you’re far from a garage. The egg whites will be cooked by heat from the radiator, and the eggs will be forced into the holes by pressure, causing the leaks to be fixed long enough for your car to be taken to a garage for repairs. Might seal the leak for 6 months to a year. Then people like putting a second or third thinking the first one worked so well. Now you have a system full of boiled egg that plugs up everything - the radiator, heater core, smaller block passages. As soon as it starts leaking again, fix the leak properly and FLUSHthe system. 3. Dusty smell. 4. Furnace smells like burning plastic. 1. Musty furnace smells. Burdun Iliya/Shutterstock. When you start up your furnace in the fall, you may notice that the furnace smells musty. Generally, it means you have some mold growing in your ductwork or on the air conditioning coil mounted above your furnace. r3aryt.