At this point, the engine will likely need a complete rebuild, even if you managed to stop the bike before the pistons seized utterly. When you hear ticking sounds from the engine, you know this process is well on its way, and the pistons are close to seizing. Both increase friction until the pistons seize completely, causing permanent damage to the cylinder walls. Also, increased temperatures will cause metals to expand. When the engine runs too hot, oil begins to burn off, causing a gradual lubrication loss.Overheating left unattended may cause damages to your ATV, such as: Then there is the factor of what is causing the bike to overheat, where some issues are more prone to causing permanent damage than others. As more coolant evaporates, the risk of severe damage increases. The boiling coolant evaporates, gradually reducing the cooling system’s ability to keep the bike cool. The severe problem comes when you allow the coolant to keep boiling. Boiling coolant usually won’t cause any damage if you catch it early. When things get so hot that the coolant boils, it’s definitely time to take a break to let things cool off. At the lower end of the scale, you have situations where the bike seems to run a bit hotter than usual, the fan may run more than you’re used to, but the temp never gets so high that the coolant starts boiling. The key to preventing overheating damage is to catch it early, get the ATV cooled off, and fix whatever issue is preventing the bike from staying cool. Prolonged overheating may cause permanent damage to the engine if left unaddressed. If you suspect that your ATV is starting to overheat, you should stop immediately and try to identify what is causing it. Overheating Can Cause Permanent Damage to Your ATV As it reaches boiling temperatures, it may start leaking out of the cooling system, releasing its maple syrup-like smell. A Sweet Smell of Hot CoolantĬoolant contains sweet-smelling (but toxic) ethylene glycol. If you see steam, it is boiling coolant from the radiator or a leak in a coolant pipe. Steam From the Radiator AreaĬoolant should not reach boiling-hot temperatures in typical riding situations. This may cause the engine to start making a ticking noise that speeds up as you rev the bike. When engine temperatures get too hot, oil meant to lubricate the engine’s internals may burn away. You usually won’t consciously pay attention to the engine temperature, but your body will still pick up when there is a change, and something doesn’t feel normal.Ĭaution! Please do not touch the engine with your bare hands, as it may be scolding hot. After all, you sit with the engine in between your legs. That’s right you will likely feel when the engine is becoming warmer than usual. If you notice fluids dripping from underneath the ATV, it’s a sign that things are getting way too hot. Fluid Leaks (Oil or Other Fluids)Īs the engine temperature rises, the viscosity in oils and other fluids decreases (thins), pressure increases, and metal parts may start warping, causing leaks. Modern ATVs will automatically reduce engine power whenever an overheating issue lasts longer than a short period. If your high temp light turns on, but all systems seem to be working as usual, and you don’t find any other signs of overheating, you may only have a bad sensor. A sensor mounted on the cylinder monitors the engine’s temperature and activates the light when it reaches a set value. Most ATVs have a lamp that flashes or turns on to indicate an overheated engine. Here are some typical signs and symptoms that may indicate the ATV is starting to overheat. It is vital to pay extra attention in riding situations where the ATV is extra prone to overheating, such as when: When an ATV begins to overheat, it will give you various warning signs that tell you something is not quite right.īy knowing what signs to look out for, you are more likely to become aware of a potentially harmful issue before it has a chance of causing permanent damage. Install a High-Pressure Radiator Cap if You Use Little to No Coolant.Use “Water Wetter” When Riding in Scorching Climates.Install an Aftermarket Water Pump and Impeller.Ensure the coolant is fresh and doesn’t need to be replaced.How to Improve Cooling and Prevent ATV Overheating.Prolonged Idling Causing Air-Cooled ATVs to Overheat The Cooling System Can’t Keep up When Riding on a Hot Day Improper Engine Tuning Causing the ATV to Run Hot ![]() Damaged Radiator, Causing Poor Cooling Performance Broken Head Gasket Causing a Coolant Loss ![]() Trapped Air Preventing Proper Coolant Circulation A Faulty Water Pump or Impeller Prevents Proper Cooling Low Battery Voltage Prevents the Radiator Fan From Working Overheating Can Cause Permanent Damage to Your ATV.
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