![]() Water pumps are built with a small weep hole. The next place you can check is the water pump. Since the radiator is located towards the front of the motorcycle, it’s possible that some sort of rock or road debris punctured a hole in one or more of those tubes/fins which would cause it to leak. Within these tubes is where the coolant runs to cool off and recirculate throughout the engine. The radiator consists of small little tubes or fins that go throughout the whole part. If neither of these two common culprits are the cause of your coolant leak on your motorcycle, the next place you should investigate is the radiator itself. Overtime, these drain plugs can break down or corrode or even become loose from the constant vibration from the motorcycle. Sometimes they break even by turning it too tight with your hand. Almost all radiators have a small plastic hand screw (that are pretty cheaply made) that can easily break. Having these clamps too tight can end up tearing the hose and putting holes in them.Īnother common failure point that could cause a motorcycle to leak coolant is the drain plug. These clamps need to be tight, but don’t require to be extremely tight. In addition to that, sometimes mechanics or motorcycle owners tighten those metal clamps at the end of the radiator hoses too tight. One may have slipped off or the end could be corroded and cracked. More commonly there is a metal clamp at each end of the hose to keep it fastened in place. This is usually caused by the connection between the hose and radiator/engine not being tight enough. That means there are four possible failure points from the hoses coming from the radiator. All motorcycles that have a radiator have an upper and lower hose there’s an engine connection on the top and bottom and a radiator connection on the top and bottom. The most common reason a motorcycle leaks coolant is because of a loose radiator hose. If you’re still unsure, try to smell it coolant will have a distinct sweet smell that the other fluids won’t have. Antifreeze can come in all different colors, but the most common color you’ll see is a neon green. To tell for sure if it’s a coolant leak you’re dealing with, assess the liquid you see leaking from your motorcycle. It’s becoming more and more common among newer motorcycles because of how efficient the system is compared to air cooled engines. Many years ago, water cooled motorcycle engines weren’t near as prevalent as they are today. This article can help guide you through your coolant leak and teach you how to fix it. The cooling system on a water cooled motorcycle is a little less complex compared to the cooling system on a car, but there are still a lot of things to consider and look out for when you own a motorcycle like this. A coolant leak can also be caused by punctured fins in the radiator, a weeping water pump, and pressure on the radiator cap from an overheating engine. Why is my motorcycle leaking coolant? There are several reasons a motorcycle will leak coolant including faulty hoses and clamps connecting the radiator and the engine as well as a faulty drain plug that has broken or become loose. Leaking coolant on a motorcycle can be incredibly frustrating, especially when you’re unsure where the leak is coming from and why it’s even happening in the first place. But, like most things, it also has it’s drawbacks. There are many advantages of owning a motorcycle that is water cooled including more effectively controlling the engine’s temperature and thermal efficiency.
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